/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/array-eq-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 17:07:41,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 17:07:41,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 17:07:42,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 17:07:42,067 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 [2022-03-01 17:07:42,091 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 17:07:42,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 17:07:42,091 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 17:07:42,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 17:07:42,092 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 17:07:42,092 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 17:07:42,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 17:07:42,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 17:07:42,093 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 17:07:42,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 17:07:42,094 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 17:07:42,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 17:07:42,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 17:07:42,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 17:07:42,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 17:07:42,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 17:07:42,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 17:07:42,095 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 17:07:42,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 17:07:42,101 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 17:07:42,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 17:07:42,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 17:07:42,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 17:07:42,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 17:07:42,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 17:07:42,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:07:42,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 17:07:42,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 17:07:42,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 17:07:42,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 17:07:42,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 17:07:42,104 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 17:07:42,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 17:07:42,104 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 17:07:42,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 17:07:42,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 17:07:42,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 17:07:42,308 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 17:07:42,309 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 17:07:42,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl [2022-03-01 17:07:42,310 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl' [2022-03-01 17:07:42,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 17:07:42,332 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 17:07:42,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 17:07:42,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 17:07:42,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 17:07:42,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:07:42" (1/1) ... [2022-03-01 17:07:42,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:07:42" (1/1) ... [2022-03-01 17:07:42,356 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 17:07:42,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 17:07:42,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 17:07:42,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 17:07:42,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 17:07:42,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:07:42" (1/1) ... [2022-03-01 17:07:42,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:07:42" (1/1) ... [2022-03-01 17:07:42,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:07:42" (1/1) ... [2022-03-01 17:07:42,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:07:42" (1/1) ... [2022-03-01 17:07:42,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:07:42" (1/1) ... [2022-03-01 17:07:42,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:07:42" (1/1) ... [2022-03-01 17:07:42,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:07:42" (1/1) ... [2022-03-01 17:07:42,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 17:07:42,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 17:07:42,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 17:07:42,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 17:07:42,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:07:42" (1/1) ... [2022-03-01 17:07:42,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:07:42,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:42,405 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) [2022-03-01 17:07:42,422 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 [2022-03-01 17:07:42,445 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 17:07:42,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 17:07:42,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 17:07:42,445 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 17:07:42,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 17:07:42,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 17:07:42,446 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 17:07:42,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 17:07:42,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 17:07:42,446 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 17:07:42,481 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 17:07:42,482 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 17:07:42,562 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 17:07:42,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 17:07:42,568 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 17:07:42,569 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:07:42 BoogieIcfgContainer [2022-03-01 17:07:42,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 17:07:42,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 17:07:42,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 17:07:42,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 17:07:42,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:07:42" (1/2) ... [2022-03-01 17:07:42,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d9bb8c and model type array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 05:07:42, skipping insertion in model container [2022-03-01 17:07:42,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:07:42" (2/2) ... [2022-03-01 17:07:42,581 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.bpl [2022-03-01 17:07:42,588 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 17:07:42,588 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 17:07:42,588 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 17:07:42,588 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 17:07:42,641 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-01 17:07:42,692 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 17:07:42,699 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 17:07:42,699 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-01 17:07:42,710 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 66 flow [2022-03-01 17:07:42,732 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:42,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 17:07:42,740 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:42,741 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:42,741 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:42,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:42,747 INFO L85 PathProgramCache]: Analyzing trace with hash -167955401, now seen corresponding path program 1 times [2022-03-01 17:07:42,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:42,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413622890] [2022-03-01 17:07:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:42,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:42,869 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:42,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413622890] [2022-03-01 17:07:42,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413622890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:07:42,870 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:07:42,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-01 17:07:42,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906261435] [2022-03-01 17:07:42,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:07:42,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 17:07:42,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:42,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 17:07:42,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:07:42,916 INFO L87 Difference]: Start difference. First operand has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:42,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:42,990 INFO L93 Difference]: Finished difference Result 102 states and 226 transitions. [2022-03-01 17:07:42,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 17:07:42,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 17:07:42,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:43,001 INFO L225 Difference]: With dead ends: 102 [2022-03-01 17:07:43,001 INFO L226 Difference]: Without dead ends: 95 [2022-03-01 17:07:43,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:07:43,014 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:43,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:07:43,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-01 17:07:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2022-03-01 17:07:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.2839506172839505) internal successors, (185), 81 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:43,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 185 transitions. [2022-03-01 17:07:43,092 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 185 transitions. Word has length 11 [2022-03-01 17:07:43,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:43,092 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 185 transitions. [2022-03-01 17:07:43,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 185 transitions. [2022-03-01 17:07:43,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:07:43,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:43,094 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:43,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 17:07:43,095 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:43,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:43,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1051815822, now seen corresponding path program 1 times [2022-03-01 17:07:43,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:43,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144331982] [2022-03-01 17:07:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:43,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:43,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:43,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144331982] [2022-03-01 17:07:43,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144331982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:07:43,201 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:07:43,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:07:43,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885170188] [2022-03-01 17:07:43,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:07:43,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:07:43,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:43,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:07:43,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:07:43,204 INFO L87 Difference]: Start difference. First operand 82 states and 185 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:43,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:43,270 INFO L93 Difference]: Finished difference Result 128 states and 286 transitions. [2022-03-01 17:07:43,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:07:43,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:07:43,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:43,272 INFO L225 Difference]: With dead ends: 128 [2022-03-01 17:07:43,272 INFO L226 Difference]: Without dead ends: 128 [2022-03-01 17:07:43,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:07:43,274 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:43,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 15 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:07:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-01 17:07:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 89. [2022-03-01 17:07:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.3181818181818183) internal successors, (204), 88 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 204 transitions. [2022-03-01 17:07:43,288 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 204 transitions. Word has length 14 [2022-03-01 17:07:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:43,288 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 204 transitions. [2022-03-01 17:07:43,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 204 transitions. [2022-03-01 17:07:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:07:43,290 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:43,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:43,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 17:07:43,290 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:43,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:43,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1207263346, now seen corresponding path program 2 times [2022-03-01 17:07:43,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:43,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172697741] [2022-03-01 17:07:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:43,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:43,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:43,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172697741] [2022-03-01 17:07:43,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172697741] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:07:43,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:07:43,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:07:43,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638080804] [2022-03-01 17:07:43,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:07:43,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:07:43,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:43,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:07:43,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:07:43,366 INFO L87 Difference]: Start difference. First operand 89 states and 204 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:43,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:43,432 INFO L93 Difference]: Finished difference Result 152 states and 327 transitions. [2022-03-01 17:07:43,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:07:43,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:07:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:43,434 INFO L225 Difference]: With dead ends: 152 [2022-03-01 17:07:43,434 INFO L226 Difference]: Without dead ends: 152 [2022-03-01 17:07:43,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:07:43,436 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:43,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 30 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:43,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-01 17:07:43,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 94. [2022-03-01 17:07:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3118279569892475) internal successors, (215), 93 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 215 transitions. [2022-03-01 17:07:43,447 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 215 transitions. Word has length 14 [2022-03-01 17:07:43,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:43,448 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 215 transitions. [2022-03-01 17:07:43,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 215 transitions. [2022-03-01 17:07:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:07:43,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:43,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:43,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 17:07:43,449 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:43,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:43,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1376889075, now seen corresponding path program 1 times [2022-03-01 17:07:43,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:43,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075436763] [2022-03-01 17:07:43,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:43,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:43,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:43,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075436763] [2022-03-01 17:07:43,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075436763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:07:43,536 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:07:43,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:07:43,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307412510] [2022-03-01 17:07:43,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:07:43,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:07:43,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:43,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:07:43,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:07:43,537 INFO L87 Difference]: Start difference. First operand 94 states and 215 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:43,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:43,601 INFO L93 Difference]: Finished difference Result 138 states and 314 transitions. [2022-03-01 17:07:43,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:07:43,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:07:43,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:43,604 INFO L225 Difference]: With dead ends: 138 [2022-03-01 17:07:43,605 INFO L226 Difference]: Without dead ends: 130 [2022-03-01 17:07:43,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:07:43,611 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:43,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 17 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:07:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-01 17:07:43,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2022-03-01 17:07:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.292929292929293) internal successors, (227), 99 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 227 transitions. [2022-03-01 17:07:43,622 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 227 transitions. Word has length 14 [2022-03-01 17:07:43,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:43,622 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 227 transitions. [2022-03-01 17:07:43,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:43,623 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 227 transitions. [2022-03-01 17:07:43,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:07:43,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:43,624 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:43,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-01 17:07:43,624 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:43,625 INFO L85 PathProgramCache]: Analyzing trace with hash 633913395, now seen corresponding path program 2 times [2022-03-01 17:07:43,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:43,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650362105] [2022-03-01 17:07:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:43,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:43,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:43,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650362105] [2022-03-01 17:07:43,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650362105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:43,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511751556] [2022-03-01 17:07:43,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:07:43,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:43,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:43,734 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) [2022-03-01 17:07:43,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 17:07:43,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:07:43,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:43,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-01 17:07:43,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:43,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:44,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511751556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:44,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:44,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-01 17:07:44,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751344102] [2022-03-01 17:07:44,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:44,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:07:44,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:44,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:07:44,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:07:44,090 INFO L87 Difference]: Start difference. First operand 100 states and 227 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:44,195 INFO L93 Difference]: Finished difference Result 150 states and 346 transitions. [2022-03-01 17:07:44,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:07:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:07:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:44,198 INFO L225 Difference]: With dead ends: 150 [2022-03-01 17:07:44,198 INFO L226 Difference]: Without dead ends: 150 [2022-03-01 17:07:44,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:07:44,201 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:44,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 28 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-01 17:07:44,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 103. [2022-03-01 17:07:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.2941176470588234) internal successors, (234), 102 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 234 transitions. [2022-03-01 17:07:44,207 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 234 transitions. Word has length 14 [2022-03-01 17:07:44,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:44,208 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 234 transitions. [2022-03-01 17:07:44,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 234 transitions. [2022-03-01 17:07:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:07:44,209 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:44,209 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:44,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-01 17:07:44,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:44,434 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:44,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:44,435 INFO L85 PathProgramCache]: Analyzing trace with hash 56537190, now seen corresponding path program 3 times [2022-03-01 17:07:44,435 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:44,435 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105672737] [2022-03-01 17:07:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:44,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:44,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:44,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105672737] [2022-03-01 17:07:44,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105672737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:07:44,497 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:07:44,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:07:44,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197895991] [2022-03-01 17:07:44,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:07:44,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:07:44,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:44,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:07:44,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:07:44,499 INFO L87 Difference]: Start difference. First operand 103 states and 234 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:44,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:44,550 INFO L93 Difference]: Finished difference Result 134 states and 303 transitions. [2022-03-01 17:07:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:07:44,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:07:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:44,551 INFO L225 Difference]: With dead ends: 134 [2022-03-01 17:07:44,551 INFO L226 Difference]: Without dead ends: 132 [2022-03-01 17:07:44,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:07:44,554 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:44,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:07:44,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-01 17:07:44,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 103. [2022-03-01 17:07:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.284313725490196) internal successors, (233), 102 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2022-03-01 17:07:44,573 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 14 [2022-03-01 17:07:44,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:44,574 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2022-03-01 17:07:44,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2022-03-01 17:07:44,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:07:44,575 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:44,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:44,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-01 17:07:44,575 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:44,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:44,576 INFO L85 PathProgramCache]: Analyzing trace with hash -2012435128, now seen corresponding path program 1 times [2022-03-01 17:07:44,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:44,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420236122] [2022-03-01 17:07:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:44,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:07:44,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:44,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420236122] [2022-03-01 17:07:44,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420236122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:44,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053516386] [2022-03-01 17:07:44,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:44,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:44,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:44,644 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) [2022-03-01 17:07:44,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 17:07:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:44,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:07:44,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:44,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:07:44,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053516386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:44,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:44,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 6 [2022-03-01 17:07:44,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049071922] [2022-03-01 17:07:44,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:44,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:07:44,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:44,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:07:44,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:07:44,877 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:44,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:44,970 INFO L93 Difference]: Finished difference Result 300 states and 674 transitions. [2022-03-01 17:07:44,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:07:44,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:07:44,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:44,973 INFO L225 Difference]: With dead ends: 300 [2022-03-01 17:07:44,973 INFO L226 Difference]: Without dead ends: 286 [2022-03-01 17:07:44,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:07:44,975 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:44,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 55 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:44,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-03-01 17:07:44,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2022-03-01 17:07:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.352112676056338) internal successors, (334), 142 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:44,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2022-03-01 17:07:44,987 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 17 [2022-03-01 17:07:44,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:44,987 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2022-03-01 17:07:44,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:44,988 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2022-03-01 17:07:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:07:44,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:44,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:45,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:45,202 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,SelfDestructingSolverStorable6 [2022-03-01 17:07:45,203 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:45,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:45,203 INFO L85 PathProgramCache]: Analyzing trace with hash 617878888, now seen corresponding path program 1 times [2022-03-01 17:07:45,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:45,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341923724] [2022-03-01 17:07:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:45,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:45,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:45,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341923724] [2022-03-01 17:07:45,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341923724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:45,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991110184] [2022-03-01 17:07:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:45,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:45,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:45,262 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) [2022-03-01 17:07:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:45,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 17:07:45,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:07:45,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:45,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:45,405 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:07:45,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:07:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:45,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991110184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:45,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:45,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2022-03-01 17:07:45,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138916478] [2022-03-01 17:07:45,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:45,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:07:45,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:45,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:07:45,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:07:45,427 INFO L87 Difference]: Start difference. First operand 143 states and 334 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:45,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:45,509 INFO L93 Difference]: Finished difference Result 248 states and 569 transitions. [2022-03-01 17:07:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:07:45,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:07:45,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:45,511 INFO L225 Difference]: With dead ends: 248 [2022-03-01 17:07:45,511 INFO L226 Difference]: Without dead ends: 248 [2022-03-01 17:07:45,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:07:45,512 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 70 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:45,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 48 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:45,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-01 17:07:45,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 194. [2022-03-01 17:07:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.4248704663212437) internal successors, (468), 193 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2022-03-01 17:07:45,519 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 17 [2022-03-01 17:07:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:45,519 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2022-03-01 17:07:45,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:45,519 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2022-03-01 17:07:45,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:07:45,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:45,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:45,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:45,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:45,735 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:45,736 INFO L85 PathProgramCache]: Analyzing trace with hash 456277538, now seen corresponding path program 2 times [2022-03-01 17:07:45,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:45,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027864557] [2022-03-01 17:07:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:45,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:07:45,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:45,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027864557] [2022-03-01 17:07:45,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027864557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:07:45,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:07:45,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:07:45,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891012386] [2022-03-01 17:07:45,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:07:45,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:07:45,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:07:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:07:45,802 INFO L87 Difference]: Start difference. First operand 194 states and 468 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2022-03-01 17:07:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:45,836 INFO L93 Difference]: Finished difference Result 311 states and 725 transitions. [2022-03-01 17:07:45,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:07:45,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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 [2022-03-01 17:07:45,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:45,840 INFO L225 Difference]: With dead ends: 311 [2022-03-01 17:07:45,840 INFO L226 Difference]: Without dead ends: 304 [2022-03-01 17:07:45,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:07:45,842 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:45,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 24 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:07:45,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-03-01 17:07:45,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2022-03-01 17:07:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.4701195219123506) internal successors, (620), 251 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 620 transitions. [2022-03-01 17:07:45,851 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 620 transitions. Word has length 17 [2022-03-01 17:07:45,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:45,851 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 620 transitions. [2022-03-01 17:07:45,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 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) [2022-03-01 17:07:45,851 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 620 transitions. [2022-03-01 17:07:45,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:07:45,852 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:45,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:45,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-01 17:07:45,853 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:45,853 INFO L85 PathProgramCache]: Analyzing trace with hash 614663528, now seen corresponding path program 1 times [2022-03-01 17:07:45,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:45,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823865693] [2022-03-01 17:07:45,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:45,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:45,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:45,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823865693] [2022-03-01 17:07:45,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823865693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:45,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136539978] [2022-03-01 17:07:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:45,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:45,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:45,911 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) [2022-03-01 17:07:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:45,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 17:07:45,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:07:45,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:46,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:46,048 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:07:46,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:07:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:46,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136539978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:46,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:46,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-03-01 17:07:46,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307247559] [2022-03-01 17:07:46,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:46,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:07:46,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:46,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:07:46,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:07:46,063 INFO L87 Difference]: Start difference. First operand 252 states and 620 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:46,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:46,129 INFO L93 Difference]: Finished difference Result 355 states and 832 transitions. [2022-03-01 17:07:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:07:46,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:07:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:46,132 INFO L225 Difference]: With dead ends: 355 [2022-03-01 17:07:46,132 INFO L226 Difference]: Without dead ends: 314 [2022-03-01 17:07:46,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:07:46,133 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:46,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 40 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-03-01 17:07:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 225. [2022-03-01 17:07:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.46875) internal successors, (553), 224 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 553 transitions. [2022-03-01 17:07:46,145 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 553 transitions. Word has length 17 [2022-03-01 17:07:46,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:46,145 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 553 transitions. [2022-03-01 17:07:46,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:46,145 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 553 transitions. [2022-03-01 17:07:46,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:07:46,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:46,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:46,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:46,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:46,368 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:46,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:46,368 INFO L85 PathProgramCache]: Analyzing trace with hash -38242968, now seen corresponding path program 2 times [2022-03-01 17:07:46,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:46,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256823737] [2022-03-01 17:07:46,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:46,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:46,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:46,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256823737] [2022-03-01 17:07:46,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256823737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:07:46,408 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:07:46,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:07:46,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937618129] [2022-03-01 17:07:46,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:07:46,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:07:46,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:46,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:07:46,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:07:46,409 INFO L87 Difference]: Start difference. First operand 225 states and 553 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) [2022-03-01 17:07:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:46,448 INFO L93 Difference]: Finished difference Result 243 states and 593 transitions. [2022-03-01 17:07:46,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:07:46,449 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 [2022-03-01 17:07:46,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:46,450 INFO L225 Difference]: With dead ends: 243 [2022-03-01 17:07:46,450 INFO L226 Difference]: Without dead ends: 243 [2022-03-01 17:07:46,450 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 [2022-03-01 17:07:46,451 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:46,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:07:46,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-01 17:07:46,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2022-03-01 17:07:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.450413223140496) internal successors, (593), 242 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:46,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 593 transitions. [2022-03-01 17:07:46,458 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 593 transitions. Word has length 17 [2022-03-01 17:07:46,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:46,458 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 593 transitions. [2022-03-01 17:07:46,458 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) [2022-03-01 17:07:46,458 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 593 transitions. [2022-03-01 17:07:46,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:07:46,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:46,459 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:46,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-01 17:07:46,459 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:46,459 INFO L85 PathProgramCache]: Analyzing trace with hash 417389902, now seen corresponding path program 3 times [2022-03-01 17:07:46,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:46,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153556389] [2022-03-01 17:07:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:46,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:46,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:46,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153556389] [2022-03-01 17:07:46,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153556389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:46,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395280386] [2022-03-01 17:07:46,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:07:46,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:46,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:46,520 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) [2022-03-01 17:07:46,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 17:07:46,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:07:46,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:46,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:07:46,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:46,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-01 17:07:46,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395280386] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:07:46,911 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-01 17:07:46,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-03-01 17:07:46,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61571409] [2022-03-01 17:07:46,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:07:46,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:07:46,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:46,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:07:46,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:07:46,914 INFO L87 Difference]: Start difference. First operand 243 states and 593 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:47,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:47,122 INFO L93 Difference]: Finished difference Result 410 states and 950 transitions. [2022-03-01 17:07:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:07:47,122 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 17:07:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:47,124 INFO L225 Difference]: With dead ends: 410 [2022-03-01 17:07:47,124 INFO L226 Difference]: Without dead ends: 403 [2022-03-01 17:07:47,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:07:47,125 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:47,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 72 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:47,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-01 17:07:47,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 295. [2022-03-01 17:07:47,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.4727891156462585) internal successors, (727), 294 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 727 transitions. [2022-03-01 17:07:47,134 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 727 transitions. Word has length 20 [2022-03-01 17:07:47,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:47,134 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 727 transitions. [2022-03-01 17:07:47,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:47,134 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 727 transitions. [2022-03-01 17:07:47,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:07:47,135 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:47,135 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:47,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:47,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-01 17:07:47,344 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:47,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:47,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1841689266, now seen corresponding path program 4 times [2022-03-01 17:07:47,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:47,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041084554] [2022-03-01 17:07:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:47,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:47,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:47,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041084554] [2022-03-01 17:07:47,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041084554] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:47,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380032641] [2022-03-01 17:07:47,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:07:47,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:47,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:47,402 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) [2022-03-01 17:07:47,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 17:07:47,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:07:47,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:47,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:07:47,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:47,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-01 17:07:47,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380032641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:07:47,584 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-01 17:07:47,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-03-01 17:07:47,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965450201] [2022-03-01 17:07:47,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:07:47,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:07:47,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:07:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:07:47,585 INFO L87 Difference]: Start difference. First operand 295 states and 727 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:47,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:47,711 INFO L93 Difference]: Finished difference Result 559 states and 1286 transitions. [2022-03-01 17:07:47,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:07:47,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 17:07:47,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:47,714 INFO L225 Difference]: With dead ends: 559 [2022-03-01 17:07:47,714 INFO L226 Difference]: Without dead ends: 559 [2022-03-01 17:07:47,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:07:47,715 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 68 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:47,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 49 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:47,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-03-01 17:07:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 363. [2022-03-01 17:07:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.5138121546961325) internal successors, (910), 362 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:47,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 910 transitions. [2022-03-01 17:07:47,729 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 910 transitions. Word has length 20 [2022-03-01 17:07:47,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:47,729 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 910 transitions. [2022-03-01 17:07:47,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:47,729 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 910 transitions. [2022-03-01 17:07:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:07:47,730 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:47,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:47,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:47,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:47,948 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:47,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1408864728, now seen corresponding path program 5 times [2022-03-01 17:07:47,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:47,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818574889] [2022-03-01 17:07:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:47,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:48,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:48,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818574889] [2022-03-01 17:07:48,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818574889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:48,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929204896] [2022-03-01 17:07:48,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:07:48,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:48,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:48,004 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) [2022-03-01 17:07:48,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 17:07:48,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:07:48,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:48,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:07:48,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:48,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:48,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929204896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:48,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:48,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2022-03-01 17:07:48,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678500881] [2022-03-01 17:07:48,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:48,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:07:48,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:48,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:07:48,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:07:48,270 INFO L87 Difference]: Start difference. First operand 363 states and 910 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:48,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:48,443 INFO L93 Difference]: Finished difference Result 581 states and 1368 transitions. [2022-03-01 17:07:48,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:07:48,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 17:07:48,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:48,446 INFO L225 Difference]: With dead ends: 581 [2022-03-01 17:07:48,446 INFO L226 Difference]: Without dead ends: 581 [2022-03-01 17:07:48,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:07:48,447 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:48,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 69 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:48,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-03-01 17:07:48,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 364. [2022-03-01 17:07:48,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.509641873278237) internal successors, (911), 363 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 911 transitions. [2022-03-01 17:07:48,458 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 911 transitions. Word has length 20 [2022-03-01 17:07:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:48,459 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 911 transitions. [2022-03-01 17:07:48,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:48,459 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 911 transitions. [2022-03-01 17:07:48,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:07:48,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:48,461 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:48,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:48,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:48,684 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:48,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:48,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2078534299, now seen corresponding path program 6 times [2022-03-01 17:07:48,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:48,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484236953] [2022-03-01 17:07:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:48,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:48,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:48,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484236953] [2022-03-01 17:07:48,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484236953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:48,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96151622] [2022-03-01 17:07:48,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:07:48,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:48,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:48,736 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) [2022-03-01 17:07:48,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 17:07:48,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:07:48,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:48,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:07:48,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:48,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:48,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96151622] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:48,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:48,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 17:07:48,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692733245] [2022-03-01 17:07:48,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:48,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:07:48,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:48,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:07:48,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:07:48,926 INFO L87 Difference]: Start difference. First operand 364 states and 911 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:49,006 INFO L93 Difference]: Finished difference Result 733 states and 1784 transitions. [2022-03-01 17:07:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:07:49,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 17:07:49,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:49,010 INFO L225 Difference]: With dead ends: 733 [2022-03-01 17:07:49,010 INFO L226 Difference]: Without dead ends: 731 [2022-03-01 17:07:49,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:07:49,010 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:49,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 39 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-01 17:07:49,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 499. [2022-03-01 17:07:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.6305220883534135) internal successors, (1310), 498 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:49,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1310 transitions. [2022-03-01 17:07:49,028 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1310 transitions. Word has length 20 [2022-03-01 17:07:49,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:49,028 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1310 transitions. [2022-03-01 17:07:49,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:49,028 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1310 transitions. [2022-03-01 17:07:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:07:49,030 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:49,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:49,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:49,251 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,SelfDestructingSolverStorable14 [2022-03-01 17:07:49,252 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:49,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1456653889, now seen corresponding path program 7 times [2022-03-01 17:07:49,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:49,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626909256] [2022-03-01 17:07:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:49,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:49,303 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:49,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626909256] [2022-03-01 17:07:49,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626909256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:49,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242708906] [2022-03-01 17:07:49,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:07:49,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:49,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:49,305 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) [2022-03-01 17:07:49,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 17:07:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:49,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:07:49,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:49,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:49,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242708906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:49,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:49,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 17:07:49,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756170083] [2022-03-01 17:07:49,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:49,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:07:49,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:49,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:07:49,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:07:49,482 INFO L87 Difference]: Start difference. First operand 499 states and 1310 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:49,605 INFO L93 Difference]: Finished difference Result 733 states and 1776 transitions. [2022-03-01 17:07:49,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:07:49,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 17:07:49,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:49,609 INFO L225 Difference]: With dead ends: 733 [2022-03-01 17:07:49,609 INFO L226 Difference]: Without dead ends: 733 [2022-03-01 17:07:49,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:07:49,610 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 94 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:49,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 50 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:49,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-03-01 17:07:49,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 496. [2022-03-01 17:07:49,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 2.614141414141414) internal successors, (1294), 495 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1294 transitions. [2022-03-01 17:07:49,626 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1294 transitions. Word has length 20 [2022-03-01 17:07:49,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:49,626 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 1294 transitions. [2022-03-01 17:07:49,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1294 transitions. [2022-03-01 17:07:49,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:07:49,628 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:49,628 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:49,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:49,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-01 17:07:49,843 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:49,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:49,843 INFO L85 PathProgramCache]: Analyzing trace with hash 524837442, now seen corresponding path program 8 times [2022-03-01 17:07:49,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:49,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744560847] [2022-03-01 17:07:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:49,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:49,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:49,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744560847] [2022-03-01 17:07:49,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744560847] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:49,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947302159] [2022-03-01 17:07:49,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:07:49,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:49,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:49,890 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) [2022-03-01 17:07:49,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 17:07:49,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:07:49,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:49,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:07:49,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:07:49,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:07:50,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947302159] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:50,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:50,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 17:07:50,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089432940] [2022-03-01 17:07:50,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:50,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:07:50,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:50,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:07:50,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:07:50,073 INFO L87 Difference]: Start difference. First operand 496 states and 1294 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:50,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:50,138 INFO L93 Difference]: Finished difference Result 580 states and 1484 transitions. [2022-03-01 17:07:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:07:50,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 17:07:50,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:50,141 INFO L225 Difference]: With dead ends: 580 [2022-03-01 17:07:50,141 INFO L226 Difference]: Without dead ends: 577 [2022-03-01 17:07:50,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:07:50,142 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:50,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 30 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:07:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-03-01 17:07:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 492. [2022-03-01 17:07:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.604887983706721) internal successors, (1279), 491 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1279 transitions. [2022-03-01 17:07:50,170 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1279 transitions. Word has length 20 [2022-03-01 17:07:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:50,171 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1279 transitions. [2022-03-01 17:07:50,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1279 transitions. [2022-03-01 17:07:50,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:07:50,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:50,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:50,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:50,387 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,SelfDestructingSolverStorable16 [2022-03-01 17:07:50,387 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:50,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:50,388 INFO L85 PathProgramCache]: Analyzing trace with hash -855067826, now seen corresponding path program 9 times [2022-03-01 17:07:50,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:50,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015291793] [2022-03-01 17:07:50,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:50,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:50,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:50,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015291793] [2022-03-01 17:07:50,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015291793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:50,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039983893] [2022-03-01 17:07:50,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:07:50,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:50,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:50,433 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) [2022-03-01 17:07:50,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 17:07:50,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:07:50,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:50,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:07:50,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:07:50,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:07:50,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039983893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:50,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:50,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 17:07:50,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728155678] [2022-03-01 17:07:50,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:50,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:07:50,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:50,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:07:50,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:07:50,653 INFO L87 Difference]: Start difference. First operand 492 states and 1279 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:50,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:50,752 INFO L93 Difference]: Finished difference Result 724 states and 1784 transitions. [2022-03-01 17:07:50,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:07:50,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 17:07:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:50,756 INFO L225 Difference]: With dead ends: 724 [2022-03-01 17:07:50,756 INFO L226 Difference]: Without dead ends: 724 [2022-03-01 17:07:50,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:07:50,757 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:50,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 36 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:50,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-03-01 17:07:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 528. [2022-03-01 17:07:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.6242884250474385) internal successors, (1383), 527 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1383 transitions. [2022-03-01 17:07:50,772 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1383 transitions. Word has length 20 [2022-03-01 17:07:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:50,772 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1383 transitions. [2022-03-01 17:07:50,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1383 transitions. [2022-03-01 17:07:50,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:07:50,773 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:50,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:50,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:50,995 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,SelfDestructingSolverStorable17 [2022-03-01 17:07:50,995 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:50,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:50,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1432444031, now seen corresponding path program 10 times [2022-03-01 17:07:50,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:50,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907789246] [2022-03-01 17:07:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:50,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:51,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:51,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907789246] [2022-03-01 17:07:51,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907789246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:51,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915130237] [2022-03-01 17:07:51,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:07:51,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:51,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:51,039 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) [2022-03-01 17:07:51,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 17:07:51,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:07:51,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:51,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:07:51,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:51,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:51,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915130237] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:51,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:51,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 17:07:51,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515415973] [2022-03-01 17:07:51,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:51,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:07:51,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:07:51,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:07:51,240 INFO L87 Difference]: Start difference. First operand 528 states and 1383 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:51,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:51,348 INFO L93 Difference]: Finished difference Result 936 states and 2429 transitions. [2022-03-01 17:07:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:07:51,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 17:07:51,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:51,353 INFO L225 Difference]: With dead ends: 936 [2022-03-01 17:07:51,353 INFO L226 Difference]: Without dead ends: 928 [2022-03-01 17:07:51,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:07:51,354 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 73 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:51,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 52 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:51,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-03-01 17:07:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 735. [2022-03-01 17:07:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.7329700272479562) internal successors, (2006), 734 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2006 transitions. [2022-03-01 17:07:51,373 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2006 transitions. Word has length 20 [2022-03-01 17:07:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:51,373 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 2006 transitions. [2022-03-01 17:07:51,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:51,374 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2006 transitions. [2022-03-01 17:07:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:07:51,375 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:51,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:51,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-01 17:07:51,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:51,598 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:51,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:51,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2054324441, now seen corresponding path program 11 times [2022-03-01 17:07:51,598 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:51,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953801168] [2022-03-01 17:07:51,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:51,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:51,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:51,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953801168] [2022-03-01 17:07:51,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953801168] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:51,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568213512] [2022-03-01 17:07:51,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:07:51,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:51,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:51,646 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) [2022-03-01 17:07:51,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 17:07:51,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:07:51,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:51,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:07:51,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:51,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:51,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568213512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:51,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:51,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 17:07:51,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999890014] [2022-03-01 17:07:51,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:51,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:07:51,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:51,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:07:51,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:07:51,836 INFO L87 Difference]: Start difference. First operand 735 states and 2006 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:51,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:51,957 INFO L93 Difference]: Finished difference Result 942 states and 2441 transitions. [2022-03-01 17:07:51,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:07:51,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 17:07:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:51,962 INFO L225 Difference]: With dead ends: 942 [2022-03-01 17:07:51,962 INFO L226 Difference]: Without dead ends: 942 [2022-03-01 17:07:51,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:07:51,963 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:51,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 45 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:51,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-03-01 17:07:51,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 740. [2022-03-01 17:07:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.7212449255751014) internal successors, (2011), 739 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:51,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2011 transitions. [2022-03-01 17:07:51,988 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2011 transitions. Word has length 20 [2022-03-01 17:07:51,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:51,988 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2011 transitions. [2022-03-01 17:07:51,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:51,989 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2011 transitions. [2022-03-01 17:07:51,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:07:51,990 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:51,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:52,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:52,206 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,SelfDestructingSolverStorable19 [2022-03-01 17:07:52,206 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:52,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:52,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1308826408, now seen corresponding path program 12 times [2022-03-01 17:07:52,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:52,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33638026] [2022-03-01 17:07:52,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:52,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:52,243 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:52,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33638026] [2022-03-01 17:07:52,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33638026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:52,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038367220] [2022-03-01 17:07:52,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:07:52,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:52,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:52,244 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) [2022-03-01 17:07:52,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 17:07:52,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:07:52,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:52,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:07:52,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:07:52,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:07:52,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038367220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:52,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:52,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-01 17:07:52,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141161929] [2022-03-01 17:07:52,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:52,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:07:52,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:52,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:07:52,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:07:52,443 INFO L87 Difference]: Start difference. First operand 740 states and 2011 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:52,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:52,512 INFO L93 Difference]: Finished difference Result 933 states and 2399 transitions. [2022-03-01 17:07:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:07:52,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 17:07:52,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:52,516 INFO L225 Difference]: With dead ends: 933 [2022-03-01 17:07:52,517 INFO L226 Difference]: Without dead ends: 930 [2022-03-01 17:07:52,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:07:52,517 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:52,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 33 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:52,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-03-01 17:07:52,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 742. [2022-03-01 17:07:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.7112010796221324) internal successors, (2009), 741 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2009 transitions. [2022-03-01 17:07:52,534 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2009 transitions. Word has length 20 [2022-03-01 17:07:52,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:52,535 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 2009 transitions. [2022-03-01 17:07:52,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:52,535 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2009 transitions. [2022-03-01 17:07:52,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:07:52,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:52,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:52,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:52,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:52,761 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:52,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:52,761 INFO L85 PathProgramCache]: Analyzing trace with hash 603070399, now seen corresponding path program 13 times [2022-03-01 17:07:52,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:52,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144984453] [2022-03-01 17:07:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:52,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:52,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:52,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144984453] [2022-03-01 17:07:52,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144984453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:52,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692791050] [2022-03-01 17:07:52,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:07:52,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:52,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:52,821 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) [2022-03-01 17:07:52,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 17:07:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:52,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:07:52,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:52,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:52,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692791050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:52,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:52,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2022-03-01 17:07:52,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764967944] [2022-03-01 17:07:52,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:52,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:07:52,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:52,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:07:52,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:07:52,994 INFO L87 Difference]: Start difference. First operand 742 states and 2009 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:53,157 INFO L93 Difference]: Finished difference Result 954 states and 2449 transitions. [2022-03-01 17:07:53,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:07:53,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 17:07:53,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:53,161 INFO L225 Difference]: With dead ends: 954 [2022-03-01 17:07:53,161 INFO L226 Difference]: Without dead ends: 954 [2022-03-01 17:07:53,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:07:53,162 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:53,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 63 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:53,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-03-01 17:07:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 706. [2022-03-01 17:07:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.697872340425532) internal successors, (1902), 705 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:53,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1902 transitions. [2022-03-01 17:07:53,179 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1902 transitions. Word has length 20 [2022-03-01 17:07:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:53,180 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 1902 transitions. [2022-03-01 17:07:53,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1902 transitions. [2022-03-01 17:07:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:07:53,181 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:53,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:53,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:53,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:53,406 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:53,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:53,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1515888974, now seen corresponding path program 14 times [2022-03-01 17:07:53,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:53,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484859490] [2022-03-01 17:07:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:53,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:53,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:53,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484859490] [2022-03-01 17:07:53,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484859490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:53,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544456250] [2022-03-01 17:07:53,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:07:53,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:53,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:53,448 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) [2022-03-01 17:07:53,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 17:07:53,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:07:53,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:53,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:07:53,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:53,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:53,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544456250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:53,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:53,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 17:07:53,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246261181] [2022-03-01 17:07:53,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:53,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:07:53,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:53,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:07:53,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:07:53,650 INFO L87 Difference]: Start difference. First operand 706 states and 1902 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:53,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:53,742 INFO L93 Difference]: Finished difference Result 867 states and 2233 transitions. [2022-03-01 17:07:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:07:53,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 17:07:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:53,745 INFO L225 Difference]: With dead ends: 867 [2022-03-01 17:07:53,745 INFO L226 Difference]: Without dead ends: 853 [2022-03-01 17:07:53,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:07:53,746 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:53,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 44 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:53,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-03-01 17:07:53,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 730. [2022-03-01 17:07:53,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 2.663923182441701) internal successors, (1942), 729 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1942 transitions. [2022-03-01 17:07:53,762 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1942 transitions. Word has length 20 [2022-03-01 17:07:53,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:53,762 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1942 transitions. [2022-03-01 17:07:53,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:53,762 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1942 transitions. [2022-03-01 17:07:53,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:07:53,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:53,764 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:53,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:53,979 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,SelfDestructingSolverStorable22 [2022-03-01 17:07:53,979 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:53,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1957491467, now seen corresponding path program 1 times [2022-03-01 17:07:53,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:53,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994170614] [2022-03-01 17:07:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:53,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:54,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:54,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994170614] [2022-03-01 17:07:54,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994170614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:54,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510695478] [2022-03-01 17:07:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:54,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:54,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:54,035 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) [2022-03-01 17:07:54,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 17:07:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:54,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:07:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:54,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:54,189 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:07:54,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:07:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:54,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510695478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:54,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:54,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-01 17:07:54,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333042027] [2022-03-01 17:07:54,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:54,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:07:54,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:54,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:07:54,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:07:54,214 INFO L87 Difference]: Start difference. First operand 730 states and 1942 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:54,524 INFO L93 Difference]: Finished difference Result 1052 states and 2592 transitions. [2022-03-01 17:07:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:07:54,524 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:07:54,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:54,529 INFO L225 Difference]: With dead ends: 1052 [2022-03-01 17:07:54,529 INFO L226 Difference]: Without dead ends: 1039 [2022-03-01 17:07:54,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:07:54,530 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 133 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:54,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 192 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:07:54,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-03-01 17:07:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 769. [2022-03-01 17:07:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 2.62890625) internal successors, (2019), 768 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2019 transitions. [2022-03-01 17:07:54,547 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2019 transitions. Word has length 23 [2022-03-01 17:07:54,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:54,547 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 2019 transitions. [2022-03-01 17:07:54,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:54,547 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2019 transitions. [2022-03-01 17:07:54,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:07:54,549 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:54,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:54,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:54,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:54,771 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:54,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:54,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1617196245, now seen corresponding path program 15 times [2022-03-01 17:07:54,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:54,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989943420] [2022-03-01 17:07:54,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:54,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:07:54,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:54,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989943420] [2022-03-01 17:07:54,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989943420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:54,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442715788] [2022-03-01 17:07:54,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:07:54,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:54,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:54,813 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) [2022-03-01 17:07:54,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 17:07:54,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:07:54,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:54,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:07:54,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:07:54,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:07:54,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442715788] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:54,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:54,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-01 17:07:54,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374098632] [2022-03-01 17:07:54,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:54,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:07:54,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:54,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:07:54,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:07:54,992 INFO L87 Difference]: Start difference. First operand 769 states and 2019 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2022-03-01 17:07:55,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:55,068 INFO L93 Difference]: Finished difference Result 1098 states and 2745 transitions. [2022-03-01 17:07:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:07:55,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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 23 [2022-03-01 17:07:55,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:55,073 INFO L225 Difference]: With dead ends: 1098 [2022-03-01 17:07:55,073 INFO L226 Difference]: Without dead ends: 1085 [2022-03-01 17:07:55,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:07:55,073 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:55,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 58 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:55,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-03-01 17:07:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 904. [2022-03-01 17:07:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 2.611295681063123) internal successors, (2358), 903 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2358 transitions. [2022-03-01 17:07:55,122 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2358 transitions. Word has length 23 [2022-03-01 17:07:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:55,122 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2358 transitions. [2022-03-01 17:07:55,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 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) [2022-03-01 17:07:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2358 transitions. [2022-03-01 17:07:55,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:07:55,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:55,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:55,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:55,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:55,326 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:55,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:55,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1684522285, now seen corresponding path program 16 times [2022-03-01 17:07:55,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:55,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441876135] [2022-03-01 17:07:55,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:55,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:07:55,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:55,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441876135] [2022-03-01 17:07:55,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441876135] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:55,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598538675] [2022-03-01 17:07:55,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:07:55,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:55,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:55,368 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) [2022-03-01 17:07:55,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 17:07:55,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:07:55,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:55,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:07:55,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:07:55,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:07:55,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598538675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:55,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:55,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-01 17:07:55,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741903955] [2022-03-01 17:07:55,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:55,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:07:55,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:55,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:07:55,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:07:55,540 INFO L87 Difference]: Start difference. First operand 904 states and 2358 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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) [2022-03-01 17:07:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:55,615 INFO L93 Difference]: Finished difference Result 1255 states and 3209 transitions. [2022-03-01 17:07:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:07:55,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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 23 [2022-03-01 17:07:55,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:55,621 INFO L225 Difference]: With dead ends: 1255 [2022-03-01 17:07:55,622 INFO L226 Difference]: Without dead ends: 1242 [2022-03-01 17:07:55,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 12 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:07:55,622 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:55,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 49 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-03-01 17:07:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1038. [2022-03-01 17:07:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 2.6673095467695274) internal successors, (2766), 1037 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 2766 transitions. [2022-03-01 17:07:55,646 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 2766 transitions. Word has length 23 [2022-03-01 17:07:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:55,647 INFO L470 AbstractCegarLoop]: Abstraction has 1038 states and 2766 transitions. [2022-03-01 17:07:55,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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) [2022-03-01 17:07:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 2766 transitions. [2022-03-01 17:07:55,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:07:55,649 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:55,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:55,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:55,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:55,863 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:55,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:55,864 INFO L85 PathProgramCache]: Analyzing trace with hash 709154997, now seen corresponding path program 1 times [2022-03-01 17:07:55,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:55,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40367310] [2022-03-01 17:07:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:55,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:55,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:55,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40367310] [2022-03-01 17:07:55,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40367310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:55,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290883934] [2022-03-01 17:07:55,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:55,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:55,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:55,923 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) [2022-03-01 17:07:55,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 17:07:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:55,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:07:55,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:56,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:56,080 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:07:56,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:07:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:56,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290883934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:56,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:56,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-01 17:07:56,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893245418] [2022-03-01 17:07:56,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:56,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:07:56,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:56,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:07:56,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:07:56,102 INFO L87 Difference]: Start difference. First operand 1038 states and 2766 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:56,322 INFO L93 Difference]: Finished difference Result 1180 states and 2996 transitions. [2022-03-01 17:07:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:07:56,322 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:07:56,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:56,327 INFO L225 Difference]: With dead ends: 1180 [2022-03-01 17:07:56,327 INFO L226 Difference]: Without dead ends: 1070 [2022-03-01 17:07:56,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:07:56,328 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:56,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 121 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:07:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-03-01 17:07:56,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 971. [2022-03-01 17:07:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 2.6649484536082473) internal successors, (2585), 970 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:56,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2585 transitions. [2022-03-01 17:07:56,347 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2585 transitions. Word has length 23 [2022-03-01 17:07:56,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:56,347 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 2585 transitions. [2022-03-01 17:07:56,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:56,348 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2585 transitions. [2022-03-01 17:07:56,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:07:56,350 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:56,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:56,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:56,563 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,SelfDestructingSolverStorable26 [2022-03-01 17:07:56,563 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:56,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:56,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1265080065, now seen corresponding path program 2 times [2022-03-01 17:07:56,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:56,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076334893] [2022-03-01 17:07:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:56,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:07:56,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:56,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076334893] [2022-03-01 17:07:56,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076334893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:56,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130566085] [2022-03-01 17:07:56,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:07:56,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:56,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:56,624 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) [2022-03-01 17:07:56,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 17:07:56,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:07:56,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:56,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:07:56,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:56,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:56,785 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:07:56,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:07:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:07:56,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130566085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:56,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:56,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2022-03-01 17:07:56,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627387849] [2022-03-01 17:07:56,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:56,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:07:56,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:56,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:07:56,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:07:56,820 INFO L87 Difference]: Start difference. First operand 971 states and 2585 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:56,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:56,979 INFO L93 Difference]: Finished difference Result 1173 states and 2980 transitions. [2022-03-01 17:07:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:07:56,980 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:07:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:56,984 INFO L225 Difference]: With dead ends: 1173 [2022-03-01 17:07:56,984 INFO L226 Difference]: Without dead ends: 1173 [2022-03-01 17:07:56,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:07:56,985 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:56,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 77 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:56,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2022-03-01 17:07:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 998. [2022-03-01 17:07:57,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 2.6559679037111334) internal successors, (2648), 997 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2648 transitions. [2022-03-01 17:07:57,007 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2648 transitions. Word has length 23 [2022-03-01 17:07:57,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:57,007 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 2648 transitions. [2022-03-01 17:07:57,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:57,007 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2648 transitions. [2022-03-01 17:07:57,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:07:57,010 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:57,010 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:57,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:57,227 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,SelfDestructingSolverStorable27 [2022-03-01 17:07:57,227 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:57,228 INFO L85 PathProgramCache]: Analyzing trace with hash 767996040, now seen corresponding path program 2 times [2022-03-01 17:07:57,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:57,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508967467] [2022-03-01 17:07:57,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:57,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:57,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:57,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508967467] [2022-03-01 17:07:57,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508967467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:57,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444031229] [2022-03-01 17:07:57,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:07:57,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:57,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:57,283 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) [2022-03-01 17:07:57,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 17:07:57,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:07:57,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:57,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:07:57,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:57,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:57,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444031229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:57,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:57,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 11 [2022-03-01 17:07:57,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348051794] [2022-03-01 17:07:57,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:57,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:07:57,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:57,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:07:57,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:07:57,493 INFO L87 Difference]: Start difference. First operand 998 states and 2648 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:57,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:57,647 INFO L93 Difference]: Finished difference Result 1682 states and 4299 transitions. [2022-03-01 17:07:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:07:57,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:07:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:57,661 INFO L225 Difference]: With dead ends: 1682 [2022-03-01 17:07:57,661 INFO L226 Difference]: Without dead ends: 1644 [2022-03-01 17:07:57,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:07:57,662 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 167 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:57,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 78 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:57,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2022-03-01 17:07:57,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1290. [2022-03-01 17:07:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 2.705973622963538) internal successors, (3488), 1289 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:57,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 3488 transitions. [2022-03-01 17:07:57,695 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 3488 transitions. Word has length 23 [2022-03-01 17:07:57,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:57,695 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 3488 transitions. [2022-03-01 17:07:57,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:57,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 3488 transitions. [2022-03-01 17:07:57,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:07:57,698 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:57,698 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:57,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:57,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-01 17:07:57,911 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:57,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:57,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1930655477, now seen corresponding path program 3 times [2022-03-01 17:07:57,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:57,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090936501] [2022-03-01 17:07:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:57,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:07:57,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:57,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090936501] [2022-03-01 17:07:57,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090936501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:57,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282509518] [2022-03-01 17:07:57,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:07:57,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:57,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:57,962 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) [2022-03-01 17:07:57,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 17:07:57,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:07:57,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:57,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:07:57,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:58,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:58,114 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:07:58,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:07:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:07:58,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282509518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:58,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:58,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2022-03-01 17:07:58,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035530544] [2022-03-01 17:07:58,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:58,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:07:58,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:58,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:07:58,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:07:58,145 INFO L87 Difference]: Start difference. First operand 1290 states and 3488 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:58,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:58,314 INFO L93 Difference]: Finished difference Result 1694 states and 4325 transitions. [2022-03-01 17:07:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:07:58,314 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:07:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:58,318 INFO L225 Difference]: With dead ends: 1694 [2022-03-01 17:07:58,318 INFO L226 Difference]: Without dead ends: 1680 [2022-03-01 17:07:58,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:07:58,319 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 129 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:58,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 105 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:07:58,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2022-03-01 17:07:58,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1364. [2022-03-01 17:07:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 2.68525311812179) internal successors, (3660), 1363 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 3660 transitions. [2022-03-01 17:07:58,368 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 3660 transitions. Word has length 23 [2022-03-01 17:07:58,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:58,369 INFO L470 AbstractCegarLoop]: Abstraction has 1364 states and 3660 transitions. [2022-03-01 17:07:58,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 3660 transitions. [2022-03-01 17:07:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:07:58,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:58,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:58,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:58,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:58,593 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:58,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:58,594 INFO L85 PathProgramCache]: Analyzing trace with hash -863978827, now seen corresponding path program 3 times [2022-03-01 17:07:58,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:58,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931491811] [2022-03-01 17:07:58,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:58,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:07:58,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:58,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931491811] [2022-03-01 17:07:58,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931491811] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:07:58,649 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:07:58,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:07:58,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372802806] [2022-03-01 17:07:58,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:07:58,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:07:58,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:58,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:07:58,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:07:58,651 INFO L87 Difference]: Start difference. First operand 1364 states and 3660 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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) [2022-03-01 17:07:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:58,698 INFO L93 Difference]: Finished difference Result 1369 states and 3577 transitions. [2022-03-01 17:07:58,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:07:58,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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 23 [2022-03-01 17:07:58,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:58,703 INFO L225 Difference]: With dead ends: 1369 [2022-03-01 17:07:58,703 INFO L226 Difference]: Without dead ends: 1327 [2022-03-01 17:07:58,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:07:58,703 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:58,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 33 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:07:58,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2022-03-01 17:07:58,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1287. [2022-03-01 17:07:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.6493001555209954) internal successors, (3407), 1286 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:58,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 3407 transitions. [2022-03-01 17:07:58,729 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 3407 transitions. Word has length 23 [2022-03-01 17:07:58,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:58,729 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 3407 transitions. [2022-03-01 17:07:58,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 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) [2022-03-01 17:07:58,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 3407 transitions. [2022-03-01 17:07:58,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:07:58,732 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:58,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:58,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-01 17:07:58,732 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:58,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:58,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1477515007, now seen corresponding path program 4 times [2022-03-01 17:07:58,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:58,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122705505] [2022-03-01 17:07:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:58,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:07:58,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:58,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122705505] [2022-03-01 17:07:58,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122705505] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:58,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545234289] [2022-03-01 17:07:58,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:07:58,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:58,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:58,782 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) [2022-03-01 17:07:58,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 17:07:58,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:07:58,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:58,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:07:58,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:58,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:58,907 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:07:58,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:07:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:07:58,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545234289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:58,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:58,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2022-03-01 17:07:58,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329400536] [2022-03-01 17:07:58,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:58,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:07:58,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:07:58,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:07:58,937 INFO L87 Difference]: Start difference. First operand 1287 states and 3407 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:59,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:59,147 INFO L93 Difference]: Finished difference Result 1517 states and 3861 transitions. [2022-03-01 17:07:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:07:59,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:07:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:59,151 INFO L225 Difference]: With dead ends: 1517 [2022-03-01 17:07:59,151 INFO L226 Difference]: Without dead ends: 1505 [2022-03-01 17:07:59,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:07:59,153 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 119 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:59,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 141 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:07:59,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2022-03-01 17:07:59,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1300. [2022-03-01 17:07:59,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 2.647421093148576) internal successors, (3439), 1299 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3439 transitions. [2022-03-01 17:07:59,184 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3439 transitions. Word has length 23 [2022-03-01 17:07:59,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:59,185 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 3439 transitions. [2022-03-01 17:07:59,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3439 transitions. [2022-03-01 17:07:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:07:59,187 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:59,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:59,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:59,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:59,408 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:59,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1626597001, now seen corresponding path program 17 times [2022-03-01 17:07:59,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:59,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516436311] [2022-03-01 17:07:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:59,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:07:59,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:59,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516436311] [2022-03-01 17:07:59,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516436311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:59,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75596597] [2022-03-01 17:07:59,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:07:59,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:59,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:59,447 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) [2022-03-01 17:07:59,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 17:07:59,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:07:59,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:59,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:07:59,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:59,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:59,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75596597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:59,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:59,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 9] total 16 [2022-03-01 17:07:59,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537646734] [2022-03-01 17:07:59,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:59,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:07:59,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:59,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:07:59,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:07:59,923 INFO L87 Difference]: Start difference. First operand 1300 states and 3439 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:00,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:00,595 INFO L93 Difference]: Finished difference Result 3312 states and 8391 transitions. [2022-03-01 17:08:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:08:00,595 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:08:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:00,601 INFO L225 Difference]: With dead ends: 3312 [2022-03-01 17:08:00,601 INFO L226 Difference]: Without dead ends: 3286 [2022-03-01 17:08:00,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:08:00,602 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 718 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:00,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 183 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:08:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2022-03-01 17:08:00,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 1657. [2022-03-01 17:08:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 2.6932367149758454) internal successors, (4460), 1656 states have internal predecessors, (4460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 4460 transitions. [2022-03-01 17:08:00,642 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 4460 transitions. Word has length 23 [2022-03-01 17:08:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:00,642 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 4460 transitions. [2022-03-01 17:08:00,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 4460 transitions. [2022-03-01 17:08:00,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:08:00,644 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:00,645 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:00,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:00,863 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,SelfDestructingSolverStorable32 [2022-03-01 17:08:00,863 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:00,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:00,863 INFO L85 PathProgramCache]: Analyzing trace with hash 664402327, now seen corresponding path program 5 times [2022-03-01 17:08:00,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:00,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838608083] [2022-03-01 17:08:00,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:00,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:00,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:00,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838608083] [2022-03-01 17:08:00,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838608083] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:00,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259641964] [2022-03-01 17:08:00,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:08:00,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:00,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:00,911 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) [2022-03-01 17:08:00,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 17:08:00,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:08:00,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:00,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:08:00,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:01,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:01,041 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:01,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:01,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259641964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:01,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:01,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-01 17:08:01,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939423157] [2022-03-01 17:08:01,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:01,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:08:01,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:01,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:08:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:01,066 INFO L87 Difference]: Start difference. First operand 1657 states and 4460 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:01,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:01,314 INFO L93 Difference]: Finished difference Result 1975 states and 5089 transitions. [2022-03-01 17:08:01,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:08:01,314 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:08:01,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:01,317 INFO L225 Difference]: With dead ends: 1975 [2022-03-01 17:08:01,317 INFO L226 Difference]: Without dead ends: 1963 [2022-03-01 17:08:01,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:08:01,318 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 119 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:01,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 112 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:01,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-03-01 17:08:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1603. [2022-03-01 17:08:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 2.6766541822721597) internal successors, (4288), 1602 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:01,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4288 transitions. [2022-03-01 17:08:01,339 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4288 transitions. Word has length 23 [2022-03-01 17:08:01,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:01,339 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 4288 transitions. [2022-03-01 17:08:01,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:01,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4288 transitions. [2022-03-01 17:08:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:08:01,341 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:01,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:01,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:01,546 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,SelfDestructingSolverStorable33 [2022-03-01 17:08:01,546 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:01,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:01,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1869408663, now seen corresponding path program 4 times [2022-03-01 17:08:01,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:01,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065425493] [2022-03-01 17:08:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:01,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:01,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:01,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065425493] [2022-03-01 17:08:01,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065425493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:01,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397071965] [2022-03-01 17:08:01,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:08:01,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:01,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:01,610 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) [2022-03-01 17:08:01,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 17:08:01,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:08:01,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:01,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:08:01,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:01,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:01,763 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:01,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:01,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397071965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:01,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:01,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-01 17:08:01,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743145446] [2022-03-01 17:08:01,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:01,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:08:01,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:01,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:08:01,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:08:01,789 INFO L87 Difference]: Start difference. First operand 1603 states and 4288 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:01,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:01,957 INFO L93 Difference]: Finished difference Result 1771 states and 4517 transitions. [2022-03-01 17:08:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:01,957 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:08:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:01,961 INFO L225 Difference]: With dead ends: 1771 [2022-03-01 17:08:01,961 INFO L226 Difference]: Without dead ends: 1683 [2022-03-01 17:08:01,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:08:01,962 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:01,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 105 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:01,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2022-03-01 17:08:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1115. [2022-03-01 17:08:01,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 2.5915619389587072) internal successors, (2887), 1114 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:01,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 2887 transitions. [2022-03-01 17:08:01,984 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 2887 transitions. Word has length 23 [2022-03-01 17:08:01,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:01,984 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 2887 transitions. [2022-03-01 17:08:01,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:01,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 2887 transitions. [2022-03-01 17:08:01,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:01,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:01,986 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:02,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:02,202 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,SelfDestructingSolverStorable34 [2022-03-01 17:08:02,202 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:02,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:02,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1790576731, now seen corresponding path program 18 times [2022-03-01 17:08:02,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:02,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680985681] [2022-03-01 17:08:02,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:02,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:02,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:02,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680985681] [2022-03-01 17:08:02,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680985681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:02,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002548427] [2022-03-01 17:08:02,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:08:02,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:02,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:02,279 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) [2022-03-01 17:08:02,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 17:08:02,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:08:02,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:02,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:08:02,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:02,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:02,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002548427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:02,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:02,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-03-01 17:08:02,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769315043] [2022-03-01 17:08:02,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:02,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:08:02,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:02,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:08:02,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:08:02,615 INFO L87 Difference]: Start difference. First operand 1115 states and 2887 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:02,796 INFO L93 Difference]: Finished difference Result 1434 states and 3502 transitions. [2022-03-01 17:08:02,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:08:02,796 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:02,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:02,799 INFO L225 Difference]: With dead ends: 1434 [2022-03-01 17:08:02,799 INFO L226 Difference]: Without dead ends: 1434 [2022-03-01 17:08:02,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:08:02,800 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 113 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:02,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 83 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:02,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2022-03-01 17:08:02,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1165. [2022-03-01 17:08:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.5764604810996565) internal successors, (2999), 1164 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2999 transitions. [2022-03-01 17:08:02,820 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2999 transitions. Word has length 26 [2022-03-01 17:08:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:02,820 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2999 transitions. [2022-03-01 17:08:02,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2999 transitions. [2022-03-01 17:08:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:02,822 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:02,823 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:02,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:03,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:03,035 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash -537103826, now seen corresponding path program 19 times [2022-03-01 17:08:03,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:03,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225643850] [2022-03-01 17:08:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:03,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:03,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:03,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225643850] [2022-03-01 17:08:03,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225643850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:03,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901344116] [2022-03-01 17:08:03,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:08:03,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:03,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:03,090 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) [2022-03-01 17:08:03,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 17:08:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:03,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:08:03,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:03,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:03,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901344116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:03,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:03,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-01 17:08:03,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338374992] [2022-03-01 17:08:03,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:03,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:08:03,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:03,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:08:03,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:08:03,289 INFO L87 Difference]: Start difference. First operand 1165 states and 2999 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:03,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:03,426 INFO L93 Difference]: Finished difference Result 1449 states and 3568 transitions. [2022-03-01 17:08:03,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:08:03,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:03,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:03,428 INFO L225 Difference]: With dead ends: 1449 [2022-03-01 17:08:03,428 INFO L226 Difference]: Without dead ends: 1449 [2022-03-01 17:08:03,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:08:03,429 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:03,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 66 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2022-03-01 17:08:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1087. [2022-03-01 17:08:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.534990791896869) internal successors, (2753), 1086 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2753 transitions. [2022-03-01 17:08:03,446 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2753 transitions. Word has length 26 [2022-03-01 17:08:03,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:03,446 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 2753 transitions. [2022-03-01 17:08:03,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:03,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2753 transitions. [2022-03-01 17:08:03,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:03,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:03,448 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:03,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-01 17:08:03,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-01 17:08:03,667 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:03,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:03,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1468920273, now seen corresponding path program 20 times [2022-03-01 17:08:03,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:03,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521546331] [2022-03-01 17:08:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:03,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:03,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:03,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521546331] [2022-03-01 17:08:03,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521546331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:03,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813462538] [2022-03-01 17:08:03,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:08:03,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:03,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:03,719 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) [2022-03-01 17:08:03,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 17:08:03,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:08:03,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:03,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:08:03,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:03,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:03,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813462538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:03,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:03,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 17:08:03,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043035840] [2022-03-01 17:08:03,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:03,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:08:03,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:03,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:08:03,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:08:03,955 INFO L87 Difference]: Start difference. First operand 1087 states and 2753 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:04,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:04,036 INFO L93 Difference]: Finished difference Result 1226 states and 3024 transitions. [2022-03-01 17:08:04,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:08:04,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:04,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:04,039 INFO L225 Difference]: With dead ends: 1226 [2022-03-01 17:08:04,039 INFO L226 Difference]: Without dead ends: 1223 [2022-03-01 17:08:04,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:08:04,039 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:04,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 50 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2022-03-01 17:08:04,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1087. [2022-03-01 17:08:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.534069981583794) internal successors, (2752), 1086 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2752 transitions. [2022-03-01 17:08:04,058 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2752 transitions. Word has length 26 [2022-03-01 17:08:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:04,058 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 2752 transitions. [2022-03-01 17:08:04,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2752 transitions. [2022-03-01 17:08:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:04,060 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:04,060 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:04,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:04,281 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,SelfDestructingSolverStorable37 [2022-03-01 17:08:04,282 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:04,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:04,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1453216515, now seen corresponding path program 21 times [2022-03-01 17:08:04,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:04,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850032172] [2022-03-01 17:08:04,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:04,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:04,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:04,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850032172] [2022-03-01 17:08:04,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850032172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:04,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734008156] [2022-03-01 17:08:04,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:08:04,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:04,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:04,335 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) [2022-03-01 17:08:04,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 17:08:04,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 17:08:04,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:04,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:08:04,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:04,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:04,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734008156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:04,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:04,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 17:08:04,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064748084] [2022-03-01 17:08:04,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:04,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:08:04,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:04,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:08:04,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:08:04,602 INFO L87 Difference]: Start difference. First operand 1087 states and 2752 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:04,726 INFO L93 Difference]: Finished difference Result 1535 states and 3703 transitions. [2022-03-01 17:08:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:04,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:04,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:04,728 INFO L225 Difference]: With dead ends: 1535 [2022-03-01 17:08:04,728 INFO L226 Difference]: Without dead ends: 1535 [2022-03-01 17:08:04,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:04,729 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:04,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 54 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2022-03-01 17:08:04,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1156. [2022-03-01 17:08:04,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1155 states have (on average 2.5567099567099567) internal successors, (2953), 1155 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:04,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 2953 transitions. [2022-03-01 17:08:04,744 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 2953 transitions. Word has length 26 [2022-03-01 17:08:04,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:04,745 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 2953 transitions. [2022-03-01 17:08:04,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:04,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 2953 transitions. [2022-03-01 17:08:04,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:04,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:04,747 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:04,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-01 17:08:04,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 17:08:04,968 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:04,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:04,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2030592720, now seen corresponding path program 22 times [2022-03-01 17:08:04,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:04,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311229871] [2022-03-01 17:08:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:04,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:05,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:05,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311229871] [2022-03-01 17:08:05,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311229871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:05,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177566685] [2022-03-01 17:08:05,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:08:05,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:05,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:05,016 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) [2022-03-01 17:08:05,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 17:08:05,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:08:05,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:05,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:08:05,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:05,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:05,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177566685] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:05,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:05,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-01 17:08:05,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746397616] [2022-03-01 17:08:05,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:05,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:08:05,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:05,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:08:05,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:08:05,222 INFO L87 Difference]: Start difference. First operand 1156 states and 2953 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:05,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:05,315 INFO L93 Difference]: Finished difference Result 1523 states and 3745 transitions. [2022-03-01 17:08:05,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:08:05,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:05,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:05,317 INFO L225 Difference]: With dead ends: 1523 [2022-03-01 17:08:05,317 INFO L226 Difference]: Without dead ends: 1521 [2022-03-01 17:08:05,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:08:05,317 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 120 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:05,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 58 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2022-03-01 17:08:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1224. [2022-03-01 17:08:05,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 2.5756336876533115) internal successors, (3150), 1223 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:05,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 3150 transitions. [2022-03-01 17:08:05,333 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 3150 transitions. Word has length 26 [2022-03-01 17:08:05,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:05,333 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 3150 transitions. [2022-03-01 17:08:05,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:05,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 3150 transitions. [2022-03-01 17:08:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:05,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:05,335 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:05,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-01 17:08:05,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 17:08:05,537 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:05,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:05,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1642494166, now seen corresponding path program 23 times [2022-03-01 17:08:05,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:05,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481166365] [2022-03-01 17:08:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:05,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:05,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:05,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481166365] [2022-03-01 17:08:05,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481166365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:05,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195769650] [2022-03-01 17:08:05,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:08:05,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:05,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:05,604 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) [2022-03-01 17:08:05,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 17:08:05,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:08:05,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:05,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:08:05,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:05,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:05,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195769650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:05,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:05,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 8 [2022-03-01 17:08:05,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964060847] [2022-03-01 17:08:05,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:05,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:08:05,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:05,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:08:05,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:08:05,792 INFO L87 Difference]: Start difference. First operand 1224 states and 3150 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:05,940 INFO L93 Difference]: Finished difference Result 1685 states and 4086 transitions. [2022-03-01 17:08:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:08:05,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:05,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:05,943 INFO L225 Difference]: With dead ends: 1685 [2022-03-01 17:08:05,943 INFO L226 Difference]: Without dead ends: 1685 [2022-03-01 17:08:05,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:08:05,944 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:05,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 68 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:05,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2022-03-01 17:08:05,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1229. [2022-03-01 17:08:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 2.574104234527687) internal successors, (3161), 1228 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) [2022-03-01 17:08:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 3161 transitions. [2022-03-01 17:08:05,966 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 3161 transitions. Word has length 26 [2022-03-01 17:08:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:05,966 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 3161 transitions. [2022-03-01 17:08:05,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 3161 transitions. [2022-03-01 17:08:05,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:05,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:05,968 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:05,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:06,190 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,SelfDestructingSolverStorable40 [2022-03-01 17:08:06,190 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:06,190 INFO L85 PathProgramCache]: Analyzing trace with hash 710677719, now seen corresponding path program 24 times [2022-03-01 17:08:06,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:06,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447617059] [2022-03-01 17:08:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:06,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:06,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:06,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447617059] [2022-03-01 17:08:06,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447617059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:06,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272423152] [2022-03-01 17:08:06,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:08:06,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:06,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:06,244 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) [2022-03-01 17:08:06,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 17:08:06,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:08:06,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:06,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:08:06,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:06,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:06,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272423152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:06,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:06,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 17:08:06,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232988255] [2022-03-01 17:08:06,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:06,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:08:06,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:06,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:08:06,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:08:06,438 INFO L87 Difference]: Start difference. First operand 1229 states and 3161 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:06,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:06,543 INFO L93 Difference]: Finished difference Result 1544 states and 3762 transitions. [2022-03-01 17:08:06,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:08:06,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:06,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:06,545 INFO L225 Difference]: With dead ends: 1544 [2022-03-01 17:08:06,546 INFO L226 Difference]: Without dead ends: 1538 [2022-03-01 17:08:06,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:08:06,546 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:06,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 64 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2022-03-01 17:08:06,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1167. [2022-03-01 17:08:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 2.544596912521441) internal successors, (2967), 1166 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 2967 transitions. [2022-03-01 17:08:06,562 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 2967 transitions. Word has length 26 [2022-03-01 17:08:06,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:06,563 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 2967 transitions. [2022-03-01 17:08:06,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:06,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 2967 transitions. [2022-03-01 17:08:06,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:06,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:06,565 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:06,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:06,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:06,786 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:06,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:06,787 INFO L85 PathProgramCache]: Analyzing trace with hash 4921710, now seen corresponding path program 25 times [2022-03-01 17:08:06,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:06,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307115678] [2022-03-01 17:08:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:06,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:06,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:06,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307115678] [2022-03-01 17:08:06,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307115678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:06,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14692555] [2022-03-01 17:08:06,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:08:06,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:06,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:06,856 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) [2022-03-01 17:08:06,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 17:08:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:06,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:08:06,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:06,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:07,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14692555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:07,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:07,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-03-01 17:08:07,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820185646] [2022-03-01 17:08:07,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:07,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:08:07,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:07,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:08:07,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:08:07,063 INFO L87 Difference]: Start difference. First operand 1167 states and 2967 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:07,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:07,225 INFO L93 Difference]: Finished difference Result 1554 states and 3721 transitions. [2022-03-01 17:08:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:08:07,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:07,227 INFO L225 Difference]: With dead ends: 1554 [2022-03-01 17:08:07,227 INFO L226 Difference]: Without dead ends: 1554 [2022-03-01 17:08:07,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:08:07,227 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 140 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:07,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 66 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-03-01 17:08:07,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1087. [2022-03-01 17:08:07,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.5211786372007365) internal successors, (2738), 1086 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:07,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2738 transitions. [2022-03-01 17:08:07,255 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2738 transitions. Word has length 26 [2022-03-01 17:08:07,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:07,256 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 2738 transitions. [2022-03-01 17:08:07,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2738 transitions. [2022-03-01 17:08:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:07,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:07,258 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:07,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:07,478 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,SelfDestructingSolverStorable42 [2022-03-01 17:08:07,479 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:07,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:07,479 INFO L85 PathProgramCache]: Analyzing trace with hash 917740285, now seen corresponding path program 26 times [2022-03-01 17:08:07,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:07,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401869754] [2022-03-01 17:08:07,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:07,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:07,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:07,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401869754] [2022-03-01 17:08:07,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401869754] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:07,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292468323] [2022-03-01 17:08:07,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:08:07,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:07,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:07,530 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:08:07,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 17:08:07,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:08:07,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:08:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:07,623 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:07,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:07,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292468323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:07,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:07,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-01 17:08:07,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124060081] [2022-03-01 17:08:07,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:07,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:08:07,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:07,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:08:07,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:08:07,721 INFO L87 Difference]: Start difference. First operand 1087 states and 2738 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:07,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:07,825 INFO L93 Difference]: Finished difference Result 1323 states and 3197 transitions. [2022-03-01 17:08:07,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:08:07,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:07,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:07,827 INFO L225 Difference]: With dead ends: 1323 [2022-03-01 17:08:07,827 INFO L226 Difference]: Without dead ends: 1311 [2022-03-01 17:08:07,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:07,827 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:07,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 66 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:07,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-03-01 17:08:07,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1096. [2022-03-01 17:08:07,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 2.51689497716895) internal successors, (2756), 1095 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) [2022-03-01 17:08:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 2756 transitions. [2022-03-01 17:08:07,842 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 2756 transitions. Word has length 26 [2022-03-01 17:08:07,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:07,842 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 2756 transitions. [2022-03-01 17:08:07,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:07,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 2756 transitions. [2022-03-01 17:08:07,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:07,844 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:07,844 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:07,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-01 17:08:08,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:08,044 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:08,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:08,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1605831935, now seen corresponding path program 27 times [2022-03-01 17:08:08,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:08,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717498063] [2022-03-01 17:08:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:08,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:08,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:08,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717498063] [2022-03-01 17:08:08,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717498063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:08,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780979457] [2022-03-01 17:08:08,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:08:08,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:08,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:08,101 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) [2022-03-01 17:08:08,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 17:08:08,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:08:08,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:08,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:08:08,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:08,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:08,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780979457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:08,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:08,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-01 17:08:08,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221714245] [2022-03-01 17:08:08,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:08,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:08:08,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:08,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:08:08,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:08:08,777 INFO L87 Difference]: Start difference. First operand 1096 states and 2756 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:09,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:09,395 INFO L93 Difference]: Finished difference Result 1688 states and 3924 transitions. [2022-03-01 17:08:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:08:09,395 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:09,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:09,397 INFO L225 Difference]: With dead ends: 1688 [2022-03-01 17:08:09,398 INFO L226 Difference]: Without dead ends: 1664 [2022-03-01 17:08:09,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=1434, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:08:09,398 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 326 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:09,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 146 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:08:09,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2022-03-01 17:08:09,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 891. [2022-03-01 17:08:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.4685393258426966) internal successors, (2197), 890 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2197 transitions. [2022-03-01 17:08:09,416 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2197 transitions. Word has length 26 [2022-03-01 17:08:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:09,416 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 2197 transitions. [2022-03-01 17:08:09,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:09,416 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2197 transitions. [2022-03-01 17:08:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:09,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:09,418 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:09,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:09,635 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,SelfDestructingSolverStorable44 [2022-03-01 17:08:09,635 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:09,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:09,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1917033433, now seen corresponding path program 28 times [2022-03-01 17:08:09,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:09,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046117217] [2022-03-01 17:08:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:09,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:09,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:09,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046117217] [2022-03-01 17:08:09,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046117217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:09,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608821126] [2022-03-01 17:08:09,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:08:09,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:09,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:09,689 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) [2022-03-01 17:08:09,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 17:08:09,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:08:09,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:09,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:08:09,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:09,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:09,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608821126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:09,931 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:09,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 17:08:09,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926147243] [2022-03-01 17:08:09,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:09,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:08:09,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:09,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:08:09,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:08:09,932 INFO L87 Difference]: Start difference. First operand 891 states and 2197 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:10,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:10,062 INFO L93 Difference]: Finished difference Result 1285 states and 3019 transitions. [2022-03-01 17:08:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:10,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:10,064 INFO L225 Difference]: With dead ends: 1285 [2022-03-01 17:08:10,064 INFO L226 Difference]: Without dead ends: 1285 [2022-03-01 17:08:10,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:10,065 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:10,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-03-01 17:08:10,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 919. [2022-03-01 17:08:10,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.4901960784313726) internal successors, (2286), 918 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2286 transitions. [2022-03-01 17:08:10,076 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2286 transitions. Word has length 26 [2022-03-01 17:08:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:10,076 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 2286 transitions. [2022-03-01 17:08:10,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2286 transitions. [2022-03-01 17:08:10,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:10,078 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:10,078 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:10,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:10,278 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,SelfDestructingSolverStorable45 [2022-03-01 17:08:10,278 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:10,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:10,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1541302350, now seen corresponding path program 29 times [2022-03-01 17:08:10,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:10,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403649625] [2022-03-01 17:08:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:10,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:10,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:10,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403649625] [2022-03-01 17:08:10,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403649625] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:10,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890538140] [2022-03-01 17:08:10,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:08:10,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:10,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:10,387 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) [2022-03-01 17:08:10,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 17:08:10,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:08:10,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:10,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:08:10,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:10,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:10,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890538140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:10,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:10,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 9 [2022-03-01 17:08:10,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793715614] [2022-03-01 17:08:10,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:10,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:08:10,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:10,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:08:10,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:08:10,582 INFO L87 Difference]: Start difference. First operand 919 states and 2286 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:10,728 INFO L93 Difference]: Finished difference Result 1336 states and 3149 transitions. [2022-03-01 17:08:10,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:08:10,729 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:10,731 INFO L225 Difference]: With dead ends: 1336 [2022-03-01 17:08:10,731 INFO L226 Difference]: Without dead ends: 1336 [2022-03-01 17:08:10,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:08:10,731 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 158 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:10,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 90 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:10,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-03-01 17:08:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 933. [2022-03-01 17:08:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 2.495708154506438) internal successors, (2326), 932 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 2326 transitions. [2022-03-01 17:08:10,743 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 2326 transitions. Word has length 26 [2022-03-01 17:08:10,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:10,743 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 2326 transitions. [2022-03-01 17:08:10,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:10,743 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 2326 transitions. [2022-03-01 17:08:10,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:10,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:10,744 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:10,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-01 17:08:10,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-01 17:08:10,945 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:10,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:10,945 INFO L85 PathProgramCache]: Analyzing trace with hash -214039629, now seen corresponding path program 30 times [2022-03-01 17:08:10,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:10,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468502256] [2022-03-01 17:08:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:10,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:10,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:10,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468502256] [2022-03-01 17:08:10,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468502256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:10,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984499082] [2022-03-01 17:08:10,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:08:10,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:10,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:10,990 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) [2022-03-01 17:08:10,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 17:08:11,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:08:11,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:11,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:08:11,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:11,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:11,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984499082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:11,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:11,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 17:08:11,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585252528] [2022-03-01 17:08:11,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:11,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:08:11,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:11,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:08:11,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:08:11,208 INFO L87 Difference]: Start difference. First operand 933 states and 2326 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:11,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:11,275 INFO L93 Difference]: Finished difference Result 1294 states and 3044 transitions. [2022-03-01 17:08:11,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:08:11,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:11,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:11,277 INFO L225 Difference]: With dead ends: 1294 [2022-03-01 17:08:11,277 INFO L226 Difference]: Without dead ends: 1291 [2022-03-01 17:08:11,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:08:11,278 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:11,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 43 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-03-01 17:08:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 933. [2022-03-01 17:08:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 2.494635193133047) internal successors, (2325), 932 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 2325 transitions. [2022-03-01 17:08:11,289 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 2325 transitions. Word has length 26 [2022-03-01 17:08:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:11,289 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 2325 transitions. [2022-03-01 17:08:11,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:11,289 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 2325 transitions. [2022-03-01 17:08:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:11,291 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:11,291 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:11,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:11,491 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,SelfDestructingSolverStorable47 [2022-03-01 17:08:11,491 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:11,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:11,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1116092490, now seen corresponding path program 31 times [2022-03-01 17:08:11,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:11,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102867645] [2022-03-01 17:08:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:11,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:11,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:11,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102867645] [2022-03-01 17:08:11,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102867645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:11,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271551649] [2022-03-01 17:08:11,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:08:11,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:11,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:11,542 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) [2022-03-01 17:08:11,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 17:08:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:11,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-01 17:08:11,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:11,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:11,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271551649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:11,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:11,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 8 [2022-03-01 17:08:11,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845672333] [2022-03-01 17:08:11,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:11,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:08:11,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:11,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:08:11,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:08:11,775 INFO L87 Difference]: Start difference. First operand 933 states and 2325 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:11,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:11,938 INFO L93 Difference]: Finished difference Result 1374 states and 3235 transitions. [2022-03-01 17:08:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:08:11,938 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:11,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:11,940 INFO L225 Difference]: With dead ends: 1374 [2022-03-01 17:08:11,940 INFO L226 Difference]: Without dead ends: 1374 [2022-03-01 17:08:11,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:08:11,941 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 136 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:11,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 82 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:11,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2022-03-01 17:08:11,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 911. [2022-03-01 17:08:11,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 2.4813186813186814) internal successors, (2258), 910 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:11,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2258 transitions. [2022-03-01 17:08:11,953 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2258 transitions. Word has length 26 [2022-03-01 17:08:11,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:11,953 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 2258 transitions. [2022-03-01 17:08:11,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2258 transitions. [2022-03-01 17:08:11,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:11,954 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:11,954 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:11,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-01 17:08:12,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-01 17:08:12,155 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:12,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:12,155 INFO L85 PathProgramCache]: Analyzing trace with hash -6977063, now seen corresponding path program 32 times [2022-03-01 17:08:12,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:12,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463530434] [2022-03-01 17:08:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:12,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:12,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:12,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463530434] [2022-03-01 17:08:12,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463530434] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:12,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863181510] [2022-03-01 17:08:12,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:08:12,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:12,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:12,202 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) [2022-03-01 17:08:12,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 17:08:12,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:08:12,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:12,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:08:12,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:12,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:12,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863181510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:12,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:12,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 14 [2022-03-01 17:08:12,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048625939] [2022-03-01 17:08:12,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:12,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:08:12,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:12,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:08:12,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:08:12,521 INFO L87 Difference]: Start difference. First operand 911 states and 2258 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:12,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:12,800 INFO L93 Difference]: Finished difference Result 1765 states and 4102 transitions. [2022-03-01 17:08:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:08:12,801 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:12,804 INFO L225 Difference]: With dead ends: 1765 [2022-03-01 17:08:12,804 INFO L226 Difference]: Without dead ends: 1717 [2022-03-01 17:08:12,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:08:12,805 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:12,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 141 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-03-01 17:08:12,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1116. [2022-03-01 17:08:12,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 2.553363228699552) internal successors, (2847), 1115 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 2847 transitions. [2022-03-01 17:08:12,825 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 2847 transitions. Word has length 26 [2022-03-01 17:08:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:12,825 INFO L470 AbstractCegarLoop]: Abstraction has 1116 states and 2847 transitions. [2022-03-01 17:08:12,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 2847 transitions. [2022-03-01 17:08:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-01 17:08:12,827 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:12,827 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:12,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:13,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-01 17:08:13,043 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:13,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:13,044 INFO L85 PathProgramCache]: Analyzing trace with hash -573902674, now seen corresponding path program 33 times [2022-03-01 17:08:13,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:13,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836519967] [2022-03-01 17:08:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:13,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:13,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:13,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836519967] [2022-03-01 17:08:13,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836519967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:13,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582502561] [2022-03-01 17:08:13,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:08:13,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:13,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:13,102 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) [2022-03-01 17:08:13,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 17:08:13,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:08:13,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:13,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:08:13,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:13,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:13,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582502561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:13,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:13,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-03-01 17:08:13,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301015136] [2022-03-01 17:08:13,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:13,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:08:13,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:13,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:08:13,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:08:13,959 INFO L87 Difference]: Start difference. First operand 1116 states and 2847 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:14,492 INFO L93 Difference]: Finished difference Result 1920 states and 4590 transitions. [2022-03-01 17:08:14,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:08:14,493 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-01 17:08:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:14,495 INFO L225 Difference]: With dead ends: 1920 [2022-03-01 17:08:14,495 INFO L226 Difference]: Without dead ends: 1911 [2022-03-01 17:08:14,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:08:14,496 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 285 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:14,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 116 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:14,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2022-03-01 17:08:14,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1254. [2022-03-01 17:08:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 2.5754189944134076) internal successors, (3227), 1253 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 3227 transitions. [2022-03-01 17:08:14,512 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 3227 transitions. Word has length 26 [2022-03-01 17:08:14,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:14,512 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 3227 transitions. [2022-03-01 17:08:14,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:14,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 3227 transitions. [2022-03-01 17:08:14,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:14,514 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:14,514 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:14,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-01 17:08:14,714 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,SelfDestructingSolverStorable50 [2022-03-01 17:08:14,715 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:14,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:14,715 INFO L85 PathProgramCache]: Analyzing trace with hash -726222136, now seen corresponding path program 5 times [2022-03-01 17:08:14,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:14,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451653884] [2022-03-01 17:08:14,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:14,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:14,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:14,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451653884] [2022-03-01 17:08:14,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451653884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:14,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028253889] [2022-03-01 17:08:14,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:08:14,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:14,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:14,779 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) [2022-03-01 17:08:14,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 17:08:14,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:08:14,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:14,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:08:14,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:14,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:14,913 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:14,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:14,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028253889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:14,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:14,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-01 17:08:14,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294690324] [2022-03-01 17:08:14,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:14,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:08:14,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:14,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:08:14,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:08:14,948 INFO L87 Difference]: Start difference. First operand 1254 states and 3227 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:15,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:15,187 INFO L93 Difference]: Finished difference Result 1654 states and 4038 transitions. [2022-03-01 17:08:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:15,187 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:08:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:15,189 INFO L225 Difference]: With dead ends: 1654 [2022-03-01 17:08:15,189 INFO L226 Difference]: Without dead ends: 1617 [2022-03-01 17:08:15,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:08:15,190 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 144 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:15,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 176 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:15,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2022-03-01 17:08:15,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1292. [2022-03-01 17:08:15,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 2.5615801704105343) internal successors, (3307), 1291 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:15,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 3307 transitions. [2022-03-01 17:08:15,205 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 3307 transitions. Word has length 29 [2022-03-01 17:08:15,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:15,205 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 3307 transitions. [2022-03-01 17:08:15,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:15,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 3307 transitions. [2022-03-01 17:08:15,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:15,206 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:15,206 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:15,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-01 17:08:15,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:15,407 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:15,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:15,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1194274584, now seen corresponding path program 34 times [2022-03-01 17:08:15,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:15,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264675951] [2022-03-01 17:08:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:15,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:15,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:15,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264675951] [2022-03-01 17:08:15,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264675951] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:15,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890466840] [2022-03-01 17:08:15,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:08:15,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:15,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:15,453 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) [2022-03-01 17:08:15,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 17:08:15,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:08:15,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:15,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:08:15,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:15,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:15,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890466840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:15,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:15,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-01 17:08:15,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273059291] [2022-03-01 17:08:15,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:15,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:08:15,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:15,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:08:15,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:08:15,620 INFO L87 Difference]: Start difference. First operand 1292 states and 3307 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:15,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:15,718 INFO L93 Difference]: Finished difference Result 1931 states and 4763 transitions. [2022-03-01 17:08:15,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:08:15,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:08:15,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:15,720 INFO L225 Difference]: With dead ends: 1931 [2022-03-01 17:08:15,720 INFO L226 Difference]: Without dead ends: 1900 [2022-03-01 17:08:15,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:08:15,721 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:15,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 95 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:15,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2022-03-01 17:08:15,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1551. [2022-03-01 17:08:15,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 2.5509677419354837) internal successors, (3954), 1550 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3954 transitions. [2022-03-01 17:08:15,746 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3954 transitions. Word has length 29 [2022-03-01 17:08:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:15,746 INFO L470 AbstractCegarLoop]: Abstraction has 1551 states and 3954 transitions. [2022-03-01 17:08:15,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3954 transitions. [2022-03-01 17:08:15,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:15,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:15,749 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:15,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-01 17:08:15,962 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,SelfDestructingSolverStorable52 [2022-03-01 17:08:15,963 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:15,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:15,963 INFO L85 PathProgramCache]: Analyzing trace with hash -219424510, now seen corresponding path program 35 times [2022-03-01 17:08:15,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:15,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061074019] [2022-03-01 17:08:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:15,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:08:16,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:16,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061074019] [2022-03-01 17:08:16,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061074019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:16,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919881902] [2022-03-01 17:08:16,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:08:16,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:16,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:16,012 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) [2022-03-01 17:08:16,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 17:08:16,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:08:16,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:16,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:08:16,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:08:16,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:08:16,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919881902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:16,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:16,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-01 17:08:16,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145866243] [2022-03-01 17:08:16,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:16,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:08:16,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:16,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:08:16,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:08:16,197 INFO L87 Difference]: Start difference. First operand 1551 states and 3954 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:16,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:16,309 INFO L93 Difference]: Finished difference Result 2118 states and 5263 transitions. [2022-03-01 17:08:16,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:08:16,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:08:16,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:16,311 INFO L225 Difference]: With dead ends: 2118 [2022-03-01 17:08:16,311 INFO L226 Difference]: Without dead ends: 2083 [2022-03-01 17:08:16,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:08:16,312 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 46 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:16,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 95 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:16,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2022-03-01 17:08:16,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1641. [2022-03-01 17:08:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1640 states have (on average 2.5725609756097563) internal successors, (4219), 1640 states have internal predecessors, (4219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 4219 transitions. [2022-03-01 17:08:16,332 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 4219 transitions. Word has length 29 [2022-03-01 17:08:16,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:16,332 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 4219 transitions. [2022-03-01 17:08:16,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:16,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 4219 transitions. [2022-03-01 17:08:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:16,334 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:16,334 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:16,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-01 17:08:16,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:16,535 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:16,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:16,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1294668488, now seen corresponding path program 6 times [2022-03-01 17:08:16,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:16,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048439761] [2022-03-01 17:08:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:16,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:16,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:16,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048439761] [2022-03-01 17:08:16,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048439761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:16,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040312092] [2022-03-01 17:08:16,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:08:16,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:16,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:16,608 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) [2022-03-01 17:08:16,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 17:08:16,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:08:16,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:16,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:08:16,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:16,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:08:16,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-03-01 17:08:16,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:08:16,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:08:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:16,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:16,856 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:16,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:16,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040312092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:16,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:16,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-01 17:08:16,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359050373] [2022-03-01 17:08:16,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:16,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:08:16,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:16,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:08:16,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:08:16,887 INFO L87 Difference]: Start difference. First operand 1641 states and 4219 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:17,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:17,031 INFO L93 Difference]: Finished difference Result 1775 states and 4447 transitions. [2022-03-01 17:08:17,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:08:17,031 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:08:17,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:17,033 INFO L225 Difference]: With dead ends: 1775 [2022-03-01 17:08:17,033 INFO L226 Difference]: Without dead ends: 1728 [2022-03-01 17:08:17,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:08:17,034 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 59 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:17,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 108 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 304 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-03-01 17:08:17,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2022-03-01 17:08:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1619. [2022-03-01 17:08:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 2.5673671199011125) internal successors, (4154), 1618 states have internal predecessors, (4154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 4154 transitions. [2022-03-01 17:08:17,055 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 4154 transitions. Word has length 29 [2022-03-01 17:08:17,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:17,055 INFO L470 AbstractCegarLoop]: Abstraction has 1619 states and 4154 transitions. [2022-03-01 17:08:17,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 4154 transitions. [2022-03-01 17:08:17,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:17,058 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:17,058 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:17,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-01 17:08:17,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:17,258 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:17,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:17,258 INFO L85 PathProgramCache]: Analyzing trace with hash 850939720, now seen corresponding path program 7 times [2022-03-01 17:08:17,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:17,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992562300] [2022-03-01 17:08:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:17,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:17,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:17,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992562300] [2022-03-01 17:08:17,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992562300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:17,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412307284] [2022-03-01 17:08:17,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:08:17,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:17,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:17,323 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) [2022-03-01 17:08:17,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 17:08:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:17,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:08:17,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:17,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:17,423 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:08:17,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:08:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:17,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412307284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:17,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:17,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 17:08:17,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165893698] [2022-03-01 17:08:17,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:17,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:08:17,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:17,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:08:17,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:08:17,472 INFO L87 Difference]: Start difference. First operand 1619 states and 4154 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) [2022-03-01 17:08:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:17,587 INFO L93 Difference]: Finished difference Result 1768 states and 4448 transitions. [2022-03-01 17:08:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:08:17,587 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 29 [2022-03-01 17:08:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:17,590 INFO L225 Difference]: With dead ends: 1768 [2022-03-01 17:08:17,590 INFO L226 Difference]: Without dead ends: 1751 [2022-03-01 17:08:17,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:08:17,591 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:17,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 76 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2022-03-01 17:08:17,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1632. [2022-03-01 17:08:17,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 2.570202329858982) internal successors, (4192), 1631 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) [2022-03-01 17:08:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 4192 transitions. [2022-03-01 17:08:17,610 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 4192 transitions. Word has length 29 [2022-03-01 17:08:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:17,610 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 4192 transitions. [2022-03-01 17:08:17,610 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) [2022-03-01 17:08:17,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 4192 transitions. [2022-03-01 17:08:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:17,612 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:17,612 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:17,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-01 17:08:17,824 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,SelfDestructingSolverStorable55 [2022-03-01 17:08:17,825 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:17,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1992594714, now seen corresponding path program 6 times [2022-03-01 17:08:17,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:17,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860821286] [2022-03-01 17:08:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:17,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:17,882 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:17,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860821286] [2022-03-01 17:08:17,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860821286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:17,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603795579] [2022-03-01 17:08:17,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:08:17,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:17,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:17,884 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) [2022-03-01 17:08:17,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 17:08:17,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 17:08:17,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:17,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:08:17,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:17,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:18,008 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:08:18,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:08:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:18,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603795579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:18,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:18,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 17:08:18,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882778440] [2022-03-01 17:08:18,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:18,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:08:18,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:18,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:08:18,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:08:18,054 INFO L87 Difference]: Start difference. First operand 1632 states and 4192 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:18,203 INFO L93 Difference]: Finished difference Result 2079 states and 5118 transitions. [2022-03-01 17:08:18,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:08:18,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:08:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:18,206 INFO L225 Difference]: With dead ends: 2079 [2022-03-01 17:08:18,206 INFO L226 Difference]: Without dead ends: 2060 [2022-03-01 17:08:18,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:08:18,206 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 86 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:18,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 120 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-03-01 17:08:18,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1695. [2022-03-01 17:08:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 2.56198347107438) internal successors, (4340), 1694 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:18,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 4340 transitions. [2022-03-01 17:08:18,226 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 4340 transitions. Word has length 29 [2022-03-01 17:08:18,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:18,227 INFO L470 AbstractCegarLoop]: Abstraction has 1695 states and 4340 transitions. [2022-03-01 17:08:18,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:18,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 4340 transitions. [2022-03-01 17:08:18,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:18,229 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:18,229 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:18,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:18,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-01 17:08:18,429 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:18,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:18,430 INFO L85 PathProgramCache]: Analyzing trace with hash -492261722, now seen corresponding path program 8 times [2022-03-01 17:08:18,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:18,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680306433] [2022-03-01 17:08:18,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:18,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:18,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:18,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680306433] [2022-03-01 17:08:18,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680306433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:18,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619652350] [2022-03-01 17:08:18,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:08:18,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:18,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:18,490 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) [2022-03-01 17:08:18,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 17:08:18,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:08:18,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:18,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:08:18,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:18,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:18,609 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:08:18,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:08:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:18,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619652350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:18,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:18,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 17:08:18,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053188420] [2022-03-01 17:08:18,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:18,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:08:18,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:18,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:08:18,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:08:18,652 INFO L87 Difference]: Start difference. First operand 1695 states and 4340 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:18,809 INFO L93 Difference]: Finished difference Result 1956 states and 4825 transitions. [2022-03-01 17:08:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:08:18,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:08:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:18,813 INFO L225 Difference]: With dead ends: 1956 [2022-03-01 17:08:18,813 INFO L226 Difference]: Without dead ends: 1916 [2022-03-01 17:08:18,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:08:18,813 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:18,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 104 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:18,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2022-03-01 17:08:18,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1661. [2022-03-01 17:08:18,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 2.560843373493976) internal successors, (4251), 1660 states have internal predecessors, (4251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 4251 transitions. [2022-03-01 17:08:18,864 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 4251 transitions. Word has length 29 [2022-03-01 17:08:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:18,864 INFO L470 AbstractCegarLoop]: Abstraction has 1661 states and 4251 transitions. [2022-03-01 17:08:18,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 4251 transitions. [2022-03-01 17:08:18,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:18,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:18,867 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:18,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-01 17:08:19,071 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,SelfDestructingSolverStorable57 [2022-03-01 17:08:19,071 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:19,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:19,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1105797902, now seen corresponding path program 9 times [2022-03-01 17:08:19,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:19,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397218489] [2022-03-01 17:08:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:19,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:08:19,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:19,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397218489] [2022-03-01 17:08:19,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397218489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:19,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144015460] [2022-03-01 17:08:19,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:08:19,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:19,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:19,126 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) [2022-03-01 17:08:19,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 17:08:19,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 17:08:19,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:19,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:08:19,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:08:19,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:19,236 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:08:19,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:08:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:08:19,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144015460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:19,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:19,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 17:08:19,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464600917] [2022-03-01 17:08:19,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:19,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:08:19,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:19,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:08:19,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:08:19,283 INFO L87 Difference]: Start difference. First operand 1661 states and 4251 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:19,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:19,406 INFO L93 Difference]: Finished difference Result 1977 states and 4908 transitions. [2022-03-01 17:08:19,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:08:19,406 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:08:19,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:19,409 INFO L225 Difference]: With dead ends: 1977 [2022-03-01 17:08:19,409 INFO L226 Difference]: Without dead ends: 1950 [2022-03-01 17:08:19,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:08:19,409 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 76 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:19,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 123 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2022-03-01 17:08:19,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1654. [2022-03-01 17:08:19,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 2.5620084694494856) internal successors, (4235), 1653 states have internal predecessors, (4235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 4235 transitions. [2022-03-01 17:08:19,437 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 4235 transitions. Word has length 29 [2022-03-01 17:08:19,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:19,437 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 4235 transitions. [2022-03-01 17:08:19,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 4235 transitions. [2022-03-01 17:08:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:19,440 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:19,440 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:19,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-01 17:08:19,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-01 17:08:19,655 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:19,656 INFO L85 PathProgramCache]: Analyzing trace with hash 2014627176, now seen corresponding path program 36 times [2022-03-01 17:08:19,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:19,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891147801] [2022-03-01 17:08:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:19,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:08:19,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:19,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891147801] [2022-03-01 17:08:19,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891147801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:19,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081832913] [2022-03-01 17:08:19,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:08:19,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:19,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:19,704 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) [2022-03-01 17:08:19,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 17:08:19,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:08:19,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:19,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:08:19,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:19,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:20,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081832913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:20,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:20,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 9] total 14 [2022-03-01 17:08:20,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048851798] [2022-03-01 17:08:20,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:20,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:08:20,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:20,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:08:20,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:08:20,071 INFO L87 Difference]: Start difference. First operand 1654 states and 4235 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:20,785 INFO L93 Difference]: Finished difference Result 2960 states and 6965 transitions. [2022-03-01 17:08:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:08:20,785 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:08:20,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:20,789 INFO L225 Difference]: With dead ends: 2960 [2022-03-01 17:08:20,789 INFO L226 Difference]: Without dead ends: 2888 [2022-03-01 17:08:20,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:08:20,790 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 341 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:20,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 317 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:08:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2022-03-01 17:08:20,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 1716. [2022-03-01 17:08:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 2.551603498542274) internal successors, (4376), 1715 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 4376 transitions. [2022-03-01 17:08:20,814 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 4376 transitions. Word has length 29 [2022-03-01 17:08:20,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:20,814 INFO L470 AbstractCegarLoop]: Abstraction has 1716 states and 4376 transitions. [2022-03-01 17:08:20,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:20,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 4376 transitions. [2022-03-01 17:08:20,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:20,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:20,816 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:20,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-01 17:08:21,017 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,SelfDestructingSolverStorable59 [2022-03-01 17:08:21,017 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:21,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:21,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1036119432, now seen corresponding path program 10 times [2022-03-01 17:08:21,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:21,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672527355] [2022-03-01 17:08:21,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:21,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:21,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:21,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672527355] [2022-03-01 17:08:21,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672527355] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:21,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253809398] [2022-03-01 17:08:21,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:08:21,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:21,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:21,079 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) [2022-03-01 17:08:21,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 17:08:21,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:08:21,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:21,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 17:08:21,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:21,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:08:21,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-01 17:08:21,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:08:21,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2022-03-01 17:08:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:21,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:21,256 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:21,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:21,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253809398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:21,342 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:21,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2022-03-01 17:08:21,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411494751] [2022-03-01 17:08:21,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:21,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:08:21,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:08:21,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:08:21,343 INFO L87 Difference]: Start difference. First operand 1716 states and 4376 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:21,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:21,746 INFO L93 Difference]: Finished difference Result 3679 states and 8912 transitions. [2022-03-01 17:08:21,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:08:21,747 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:08:21,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:21,764 INFO L225 Difference]: With dead ends: 3679 [2022-03-01 17:08:21,764 INFO L226 Difference]: Without dead ends: 3596 [2022-03-01 17:08:21,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:08:21,765 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 320 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:21,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 282 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:08:21,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2022-03-01 17:08:21,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 2192. [2022-03-01 17:08:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 2.605659516202647) internal successors, (5709), 2191 states have internal predecessors, (5709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 5709 transitions. [2022-03-01 17:08:21,795 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 5709 transitions. Word has length 29 [2022-03-01 17:08:21,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:21,795 INFO L470 AbstractCegarLoop]: Abstraction has 2192 states and 5709 transitions. [2022-03-01 17:08:21,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:21,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 5709 transitions. [2022-03-01 17:08:21,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:21,799 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:21,799 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:21,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-01 17:08:22,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:22,000 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:22,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:22,000 INFO L85 PathProgramCache]: Analyzing trace with hash -188205470, now seen corresponding path program 7 times [2022-03-01 17:08:22,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:22,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573416451] [2022-03-01 17:08:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:22,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:22,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:22,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573416451] [2022-03-01 17:08:22,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573416451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:22,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412262120] [2022-03-01 17:08:22,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:08:22,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:22,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:22,054 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) [2022-03-01 17:08:22,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 17:08:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:22,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 17:08:22,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:22,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:08:22,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-01 17:08:22,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:08:22,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2022-03-01 17:08:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:22,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:22,288 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:22,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:22,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412262120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:22,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:22,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 15 [2022-03-01 17:08:22,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148395926] [2022-03-01 17:08:22,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:22,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:08:22,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:22,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:08:22,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:08:22,373 INFO L87 Difference]: Start difference. First operand 2192 states and 5709 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:22,839 INFO L93 Difference]: Finished difference Result 4331 states and 10618 transitions. [2022-03-01 17:08:22,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:08:22,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:08:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:22,845 INFO L225 Difference]: With dead ends: 4331 [2022-03-01 17:08:22,845 INFO L226 Difference]: Without dead ends: 4271 [2022-03-01 17:08:22,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:08:22,846 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 327 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:22,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 374 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:08:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4271 states. [2022-03-01 17:08:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4271 to 2745. [2022-03-01 17:08:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2745 states, 2744 states have (on average 2.6450437317784257) internal successors, (7258), 2744 states have internal predecessors, (7258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 7258 transitions. [2022-03-01 17:08:22,904 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 7258 transitions. Word has length 29 [2022-03-01 17:08:22,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:22,904 INFO L470 AbstractCegarLoop]: Abstraction has 2745 states and 7258 transitions. [2022-03-01 17:08:22,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:22,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 7258 transitions. [2022-03-01 17:08:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:22,906 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:22,907 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:22,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-01 17:08:23,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:23,108 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:23,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1821501854, now seen corresponding path program 11 times [2022-03-01 17:08:23,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:23,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124584153] [2022-03-01 17:08:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:23,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:23,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:23,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124584153] [2022-03-01 17:08:23,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124584153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:23,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208516231] [2022-03-01 17:08:23,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:08:23,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:23,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:23,171 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) [2022-03-01 17:08:23,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 17:08:23,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:08:23,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:23,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:08:23,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:23,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:23,371 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:23,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:23,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208516231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:23,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:23,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-01 17:08:23,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474713794] [2022-03-01 17:08:23,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:23,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:08:23,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:23,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:08:23,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:23,412 INFO L87 Difference]: Start difference. First operand 2745 states and 7258 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:23,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:23,535 INFO L93 Difference]: Finished difference Result 2931 states and 7615 transitions. [2022-03-01 17:08:23,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:08:23,536 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:08:23,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:23,541 INFO L225 Difference]: With dead ends: 2931 [2022-03-01 17:08:23,541 INFO L226 Difference]: Without dead ends: 2908 [2022-03-01 17:08:23,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:23,542 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:23,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 74 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 234 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-03-01 17:08:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2022-03-01 17:08:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2736. [2022-03-01 17:08:23,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2735 states have (on average 2.6453382084095063) internal successors, (7235), 2735 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 7235 transitions. [2022-03-01 17:08:23,586 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 7235 transitions. Word has length 29 [2022-03-01 17:08:23,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:23,586 INFO L470 AbstractCegarLoop]: Abstraction has 2736 states and 7235 transitions. [2022-03-01 17:08:23,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:23,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 7235 transitions. [2022-03-01 17:08:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:23,590 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:23,590 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:23,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:23,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:23,812 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:23,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1968094858, now seen corresponding path program 8 times [2022-03-01 17:08:23,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:23,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468643498] [2022-03-01 17:08:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:23,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:23,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:23,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468643498] [2022-03-01 17:08:23,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468643498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:23,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192998620] [2022-03-01 17:08:23,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:08:23,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:23,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:23,879 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) [2022-03-01 17:08:23,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 17:08:23,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:08:23,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:23,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:08:23,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:23,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:24,008 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:08:24,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:08:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:24,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192998620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:24,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:24,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-01 17:08:24,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111578435] [2022-03-01 17:08:24,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:24,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:08:24,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:24,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:08:24,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:08:24,061 INFO L87 Difference]: Start difference. First operand 2736 states and 7235 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) [2022-03-01 17:08:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:24,242 INFO L93 Difference]: Finished difference Result 3236 states and 8301 transitions. [2022-03-01 17:08:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:08:24,242 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 29 [2022-03-01 17:08:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:24,247 INFO L225 Difference]: With dead ends: 3236 [2022-03-01 17:08:24,247 INFO L226 Difference]: Without dead ends: 3226 [2022-03-01 17:08:24,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:08:24,248 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:24,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 115 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2022-03-01 17:08:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2784. [2022-03-01 17:08:24,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2783 states have (on average 2.643190801293568) internal successors, (7356), 2783 states have internal predecessors, (7356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 7356 transitions. [2022-03-01 17:08:24,302 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 7356 transitions. Word has length 29 [2022-03-01 17:08:24,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:24,302 INFO L470 AbstractCegarLoop]: Abstraction has 2784 states and 7356 transitions. [2022-03-01 17:08:24,302 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) [2022-03-01 17:08:24,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 7356 transitions. [2022-03-01 17:08:24,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:24,306 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:24,306 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:24,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:24,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:24,528 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:24,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:24,528 INFO L85 PathProgramCache]: Analyzing trace with hash -826539446, now seen corresponding path program 12 times [2022-03-01 17:08:24,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:24,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175408855] [2022-03-01 17:08:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:24,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:24,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:24,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175408855] [2022-03-01 17:08:24,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175408855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:24,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629229432] [2022-03-01 17:08:24,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:08:24,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:24,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:24,588 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) [2022-03-01 17:08:24,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 17:08:24,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:08:24,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:24,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:08:24,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:24,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:24,712 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:08:24,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:08:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:24,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629229432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:24,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:24,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 17:08:24,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457411453] [2022-03-01 17:08:24,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:24,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:08:24,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:24,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:08:24,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:08:24,759 INFO L87 Difference]: Start difference. First operand 2784 states and 7356 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:24,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:24,917 INFO L93 Difference]: Finished difference Result 3210 states and 8180 transitions. [2022-03-01 17:08:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:08:24,917 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:08:24,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:24,921 INFO L225 Difference]: With dead ends: 3210 [2022-03-01 17:08:24,921 INFO L226 Difference]: Without dead ends: 3141 [2022-03-01 17:08:24,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:08:24,922 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 73 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:24,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 115 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3141 states. [2022-03-01 17:08:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3141 to 2767. [2022-03-01 17:08:24,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2766 states have (on average 2.63412870571222) internal successors, (7286), 2766 states have internal predecessors, (7286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:24,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 7286 transitions. [2022-03-01 17:08:24,958 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 7286 transitions. Word has length 29 [2022-03-01 17:08:24,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:24,959 INFO L470 AbstractCegarLoop]: Abstraction has 2767 states and 7286 transitions. [2022-03-01 17:08:24,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:24,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 7286 transitions. [2022-03-01 17:08:24,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:24,961 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:24,961 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:24,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-01 17:08:25,162 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,SelfDestructingSolverStorable64 [2022-03-01 17:08:25,162 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:25,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:25,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1597375113, now seen corresponding path program 9 times [2022-03-01 17:08:25,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:25,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807707138] [2022-03-01 17:08:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:25,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:25,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:25,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807707138] [2022-03-01 17:08:25,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807707138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:25,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918502414] [2022-03-01 17:08:25,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:08:25,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:25,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:25,220 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) [2022-03-01 17:08:25,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 17:08:25,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:08:25,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:25,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:08:25,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:25,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:25,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918502414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:25,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:25,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:08:25,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059776802] [2022-03-01 17:08:25,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:25,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:08:25,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:25,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:08:25,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:08:25,494 INFO L87 Difference]: Start difference. First operand 2767 states and 7286 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:25,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:25,687 INFO L93 Difference]: Finished difference Result 3548 states and 9044 transitions. [2022-03-01 17:08:25,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:08:25,687 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:08:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:25,692 INFO L225 Difference]: With dead ends: 3548 [2022-03-01 17:08:25,692 INFO L226 Difference]: Without dead ends: 3514 [2022-03-01 17:08:25,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:08:25,692 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 164 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:25,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 111 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:25,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2022-03-01 17:08:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 2924. [2022-03-01 17:08:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2924 states, 2923 states have (on average 2.62777967841259) internal successors, (7681), 2923 states have internal predecessors, (7681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 7681 transitions. [2022-03-01 17:08:25,728 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 7681 transitions. Word has length 29 [2022-03-01 17:08:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:25,728 INFO L470 AbstractCegarLoop]: Abstraction has 2924 states and 7681 transitions. [2022-03-01 17:08:25,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 7681 transitions. [2022-03-01 17:08:25,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:25,731 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:25,731 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:25,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-01 17:08:25,932 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,SelfDestructingSolverStorable65 [2022-03-01 17:08:25,932 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:25,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1835185986, now seen corresponding path program 37 times [2022-03-01 17:08:25,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:25,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286117920] [2022-03-01 17:08:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:25,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:25,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:25,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286117920] [2022-03-01 17:08:25,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286117920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:25,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483620314] [2022-03-01 17:08:25,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:08:25,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:25,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:25,978 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) [2022-03-01 17:08:25,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 17:08:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:26,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:08:26,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:26,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:26,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483620314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:26,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:26,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-01 17:08:26,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168572910] [2022-03-01 17:08:26,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:26,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:08:26,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:26,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:08:26,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:08:26,162 INFO L87 Difference]: Start difference. First operand 2924 states and 7681 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:26,285 INFO L93 Difference]: Finished difference Result 3346 states and 8612 transitions. [2022-03-01 17:08:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:08:26,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:08:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:26,291 INFO L225 Difference]: With dead ends: 3346 [2022-03-01 17:08:26,292 INFO L226 Difference]: Without dead ends: 3301 [2022-03-01 17:08:26,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:08:26,294 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:26,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 92 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:26,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3301 states. [2022-03-01 17:08:26,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3301 to 3007. [2022-03-01 17:08:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3007 states, 3006 states have (on average 2.6167664670658684) internal successors, (7866), 3006 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:26,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3007 states to 3007 states and 7866 transitions. [2022-03-01 17:08:26,370 INFO L78 Accepts]: Start accepts. Automaton has 3007 states and 7866 transitions. Word has length 29 [2022-03-01 17:08:26,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:26,371 INFO L470 AbstractCegarLoop]: Abstraction has 3007 states and 7866 transitions. [2022-03-01 17:08:26,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3007 states and 7866 transitions. [2022-03-01 17:08:26,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:26,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:26,374 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:26,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:26,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-01 17:08:26,587 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:26,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:26,587 INFO L85 PathProgramCache]: Analyzing trace with hash 856678242, now seen corresponding path program 13 times [2022-03-01 17:08:26,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:26,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098258377] [2022-03-01 17:08:26,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:26,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:26,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:26,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098258377] [2022-03-01 17:08:26,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098258377] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:26,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640539099] [2022-03-01 17:08:26,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:08:26,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:26,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:26,654 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) [2022-03-01 17:08:26,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 17:08:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:26,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:08:26,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:26,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:26,798 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:26,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:26,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640539099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:26,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:26,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-01 17:08:26,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547757587] [2022-03-01 17:08:26,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:26,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:08:26,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:26,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:08:26,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:08:26,840 INFO L87 Difference]: Start difference. First operand 3007 states and 7866 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:27,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:27,052 INFO L93 Difference]: Finished difference Result 3544 states and 9002 transitions. [2022-03-01 17:08:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:27,053 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:08:27,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:27,057 INFO L225 Difference]: With dead ends: 3544 [2022-03-01 17:08:27,057 INFO L226 Difference]: Without dead ends: 3469 [2022-03-01 17:08:27,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:08:27,057 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 93 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:27,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 92 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:27,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2022-03-01 17:08:27,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 3058. [2022-03-01 17:08:27,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3058 states, 3057 states have (on average 2.596990513575401) internal successors, (7939), 3057 states have internal predecessors, (7939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:27,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 7939 transitions. [2022-03-01 17:08:27,104 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 7939 transitions. Word has length 29 [2022-03-01 17:08:27,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:27,104 INFO L470 AbstractCegarLoop]: Abstraction has 3058 states and 7939 transitions. [2022-03-01 17:08:27,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 7939 transitions. [2022-03-01 17:08:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:08:27,107 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:27,107 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:27,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:27,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:27,323 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:27,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:27,324 INFO L85 PathProgramCache]: Analyzing trace with hash 718658832, now seen corresponding path program 14 times [2022-03-01 17:08:27,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:27,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968826740] [2022-03-01 17:08:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:27,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:27,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:27,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968826740] [2022-03-01 17:08:27,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968826740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:27,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586827464] [2022-03-01 17:08:27,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:08:27,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:27,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:27,412 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) [2022-03-01 17:08:27,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 17:08:27,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:08:27,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:27,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:08:27,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:27,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:27,575 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:27,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:27,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586827464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:27,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:27,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-01 17:08:27,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409475992] [2022-03-01 17:08:27,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:27,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:08:27,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:27,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:08:27,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:08:27,605 INFO L87 Difference]: Start difference. First operand 3058 states and 7939 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:27,804 INFO L93 Difference]: Finished difference Result 3332 states and 8457 transitions. [2022-03-01 17:08:27,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:08:27,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:08:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:27,809 INFO L225 Difference]: With dead ends: 3332 [2022-03-01 17:08:27,810 INFO L226 Difference]: Without dead ends: 3286 [2022-03-01 17:08:27,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:08:27,810 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:27,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 114 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:27,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2022-03-01 17:08:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 3041. [2022-03-01 17:08:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3041 states, 3040 states have (on average 2.599671052631579) internal successors, (7903), 3040 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:27,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3041 states to 3041 states and 7903 transitions. [2022-03-01 17:08:27,864 INFO L78 Accepts]: Start accepts. Automaton has 3041 states and 7903 transitions. Word has length 29 [2022-03-01 17:08:27,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:27,865 INFO L470 AbstractCegarLoop]: Abstraction has 3041 states and 7903 transitions. [2022-03-01 17:08:27,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:27,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3041 states and 7903 transitions. [2022-03-01 17:08:27,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:08:27,868 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:27,868 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:27,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-01 17:08:28,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:28,079 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:28,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash -739301394, now seen corresponding path program 38 times [2022-03-01 17:08:28,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:28,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379435767] [2022-03-01 17:08:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:28,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:28,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:28,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379435767] [2022-03-01 17:08:28,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379435767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:28,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106599537] [2022-03-01 17:08:28,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:08:28,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:28,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:28,172 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) [2022-03-01 17:08:28,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 17:08:28,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:08:28,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:28,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:08:28,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:28,339 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:28,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:28,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106599537] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:28,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:28,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 11 [2022-03-01 17:08:28,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689944958] [2022-03-01 17:08:28,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:28,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:08:28,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:28,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:08:28,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:08:28,510 INFO L87 Difference]: Start difference. First operand 3041 states and 7903 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:28,794 INFO L93 Difference]: Finished difference Result 3608 states and 9020 transitions. [2022-03-01 17:08:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:08:28,794 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:08:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:28,801 INFO L225 Difference]: With dead ends: 3608 [2022-03-01 17:08:28,801 INFO L226 Difference]: Without dead ends: 3608 [2022-03-01 17:08:28,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:08:28,801 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 158 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:28,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 111 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2022-03-01 17:08:28,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3046. [2022-03-01 17:08:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 2.5891625615763547) internal successors, (7884), 3045 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 7884 transitions. [2022-03-01 17:08:28,876 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 7884 transitions. Word has length 32 [2022-03-01 17:08:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:28,876 INFO L470 AbstractCegarLoop]: Abstraction has 3046 states and 7884 transitions. [2022-03-01 17:08:28,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:28,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 7884 transitions. [2022-03-01 17:08:28,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-01 17:08:28,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:28,880 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:28,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:29,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-01 17:08:29,095 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:29,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:29,096 INFO L85 PathProgramCache]: Analyzing trace with hash -178434399, now seen corresponding path program 39 times [2022-03-01 17:08:29,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:29,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736085326] [2022-03-01 17:08:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:29,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:29,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:29,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736085326] [2022-03-01 17:08:29,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736085326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:29,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460885794] [2022-03-01 17:08:29,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:08:29,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:29,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:29,154 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) [2022-03-01 17:08:29,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 17:08:29,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:08:29,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:29,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:08:29,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-01 17:08:29,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-01 17:08:29,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460885794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:29,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:29,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-03-01 17:08:29,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757314999] [2022-03-01 17:08:29,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:29,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:08:29,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:29,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:08:29,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:08:29,952 INFO L87 Difference]: Start difference. First operand 3046 states and 7884 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 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) [2022-03-01 17:08:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:30,833 INFO L93 Difference]: Finished difference Result 4500 states and 10890 transitions. [2022-03-01 17:08:30,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 17:08:30,833 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-01 17:08:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:30,839 INFO L225 Difference]: With dead ends: 4500 [2022-03-01 17:08:30,839 INFO L226 Difference]: Without dead ends: 4477 [2022-03-01 17:08:30,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=757, Invalid=1999, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:08:30,839 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 696 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:30,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 140 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:08:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4477 states. [2022-03-01 17:08:30,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4477 to 2907. [2022-03-01 17:08:30,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 2906 states have (on average 2.55230557467309) internal successors, (7417), 2906 states have internal predecessors, (7417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 7417 transitions. [2022-03-01 17:08:30,896 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 7417 transitions. Word has length 32 [2022-03-01 17:08:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:30,896 INFO L470 AbstractCegarLoop]: Abstraction has 2907 states and 7417 transitions. [2022-03-01 17:08:30,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 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) [2022-03-01 17:08:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 7417 transitions. [2022-03-01 17:08:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:30,900 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:30,900 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:30,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:31,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:31,114 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:31,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1854825621, now seen corresponding path program 10 times [2022-03-01 17:08:31,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:31,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684272831] [2022-03-01 17:08:31,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:31,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:31,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:31,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684272831] [2022-03-01 17:08:31,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684272831] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:31,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449207088] [2022-03-01 17:08:31,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:08:31,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:31,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:31,198 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) [2022-03-01 17:08:31,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 17:08:31,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:08:31,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:31,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:31,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:31,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:31,361 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:31,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:31,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449207088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:31,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:31,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-01 17:08:31,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325378090] [2022-03-01 17:08:31,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:31,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:08:31,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:31,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:08:31,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:31,404 INFO L87 Difference]: Start difference. First operand 2907 states and 7417 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:31,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:31,693 INFO L93 Difference]: Finished difference Result 3636 states and 8898 transitions. [2022-03-01 17:08:31,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:08:31,693 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:31,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:31,698 INFO L225 Difference]: With dead ends: 3636 [2022-03-01 17:08:31,698 INFO L226 Difference]: Without dead ends: 3603 [2022-03-01 17:08:31,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:08:31,698 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 220 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:31,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 245 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:31,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2022-03-01 17:08:31,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 2856. [2022-03-01 17:08:31,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2855 states have (on average 2.5597197898423816) internal successors, (7308), 2855 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 7308 transitions. [2022-03-01 17:08:31,750 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 7308 transitions. Word has length 35 [2022-03-01 17:08:31,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:31,750 INFO L470 AbstractCegarLoop]: Abstraction has 2856 states and 7308 transitions. [2022-03-01 17:08:31,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:31,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 7308 transitions. [2022-03-01 17:08:31,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:31,753 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:31,753 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:31,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-01 17:08:31,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:31,967 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:31,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:31,968 INFO L85 PathProgramCache]: Analyzing trace with hash -972961707, now seen corresponding path program 15 times [2022-03-01 17:08:31,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:31,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713956380] [2022-03-01 17:08:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:31,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:32,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:32,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713956380] [2022-03-01 17:08:32,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713956380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:32,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430451916] [2022-03-01 17:08:32,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:08:32,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:32,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:32,064 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) [2022-03-01 17:08:32,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 17:08:32,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 17:08:32,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:32,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:32,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:32,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:32,355 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:32,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:32,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430451916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:32,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:32,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:08:32,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167061567] [2022-03-01 17:08:32,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:32,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:08:32,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:32,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:08:32,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:08:32,397 INFO L87 Difference]: Start difference. First operand 2856 states and 7308 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 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) [2022-03-01 17:08:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:32,607 INFO L93 Difference]: Finished difference Result 3056 states and 7643 transitions. [2022-03-01 17:08:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:32,608 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 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 35 [2022-03-01 17:08:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:32,611 INFO L225 Difference]: With dead ends: 3056 [2022-03-01 17:08:32,611 INFO L226 Difference]: Without dead ends: 2989 [2022-03-01 17:08:32,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:08:32,612 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 117 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:32,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 242 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 535 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-03-01 17:08:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2022-03-01 17:08:32,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2847. [2022-03-01 17:08:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.555867884750527) internal successors, (7274), 2846 states have internal predecessors, (7274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 7274 transitions. [2022-03-01 17:08:32,644 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 7274 transitions. Word has length 35 [2022-03-01 17:08:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:32,644 INFO L470 AbstractCegarLoop]: Abstraction has 2847 states and 7274 transitions. [2022-03-01 17:08:32,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 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) [2022-03-01 17:08:32,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 7274 transitions. [2022-03-01 17:08:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:32,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:32,647 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:32,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-01 17:08:32,847 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,SelfDestructingSolverStorable72 [2022-03-01 17:08:32,847 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:32,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:32,847 INFO L85 PathProgramCache]: Analyzing trace with hash -800888287, now seen corresponding path program 16 times [2022-03-01 17:08:32,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:32,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576287418] [2022-03-01 17:08:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:32,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:32,915 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:32,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576287418] [2022-03-01 17:08:32,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576287418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:32,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205291368] [2022-03-01 17:08:32,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:08:32,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:32,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:32,916 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) [2022-03-01 17:08:32,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 17:08:32,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:08:32,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:32,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:32,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:33,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:33,042 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:08:33,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:08:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:33,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205291368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:33,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:33,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-01 17:08:33,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555259836] [2022-03-01 17:08:33,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:33,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:08:33,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:33,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:08:33,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:08:33,121 INFO L87 Difference]: Start difference. First operand 2847 states and 7274 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:33,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:33,289 INFO L93 Difference]: Finished difference Result 3126 states and 7799 transitions. [2022-03-01 17:08:33,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:33,290 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:33,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:33,293 INFO L225 Difference]: With dead ends: 3126 [2022-03-01 17:08:33,293 INFO L226 Difference]: Without dead ends: 3126 [2022-03-01 17:08:33,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:33,294 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 54 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:33,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 141 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2022-03-01 17:08:33,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2847. [2022-03-01 17:08:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.555867884750527) internal successors, (7274), 2846 states have internal predecessors, (7274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 7274 transitions. [2022-03-01 17:08:33,323 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 7274 transitions. Word has length 35 [2022-03-01 17:08:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:33,323 INFO L470 AbstractCegarLoop]: Abstraction has 2847 states and 7274 transitions. [2022-03-01 17:08:33,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:33,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 7274 transitions. [2022-03-01 17:08:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:33,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:33,325 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:33,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-01 17:08:33,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:33,526 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash 649055720, now seen corresponding path program 11 times [2022-03-01 17:08:33,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:33,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903061380] [2022-03-01 17:08:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:33,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:33,624 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:33,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:33,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903061380] [2022-03-01 17:08:33,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903061380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:33,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865599150] [2022-03-01 17:08:33,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:08:33,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:33,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:33,626 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:08:33,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 17:08:33,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 17:08:33,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:33,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:08:33,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:33,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:33,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865599150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:33,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:33,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 19 [2022-03-01 17:08:33,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124839586] [2022-03-01 17:08:33,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:33,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:08:33,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:33,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:08:33,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:08:33,922 INFO L87 Difference]: Start difference. First operand 2847 states and 7274 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:34,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:34,110 INFO L93 Difference]: Finished difference Result 3672 states and 8968 transitions. [2022-03-01 17:08:34,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:08:34,110 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:34,114 INFO L225 Difference]: With dead ends: 3672 [2022-03-01 17:08:34,114 INFO L226 Difference]: Without dead ends: 3632 [2022-03-01 17:08:34,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:08:34,115 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 212 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:34,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 123 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2022-03-01 17:08:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 2685. [2022-03-01 17:08:34,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2684 states have (on average 2.5152757078986587) internal successors, (6751), 2684 states have internal predecessors, (6751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 6751 transitions. [2022-03-01 17:08:34,151 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 6751 transitions. Word has length 35 [2022-03-01 17:08:34,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:34,152 INFO L470 AbstractCegarLoop]: Abstraction has 2685 states and 6751 transitions. [2022-03-01 17:08:34,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 6751 transitions. [2022-03-01 17:08:34,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:34,155 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:34,155 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:34,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:34,377 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,SelfDestructingSolverStorable74 [2022-03-01 17:08:34,377 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:34,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:34,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1462970056, now seen corresponding path program 17 times [2022-03-01 17:08:34,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:34,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254801537] [2022-03-01 17:08:34,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:34,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:34,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:34,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254801537] [2022-03-01 17:08:34,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254801537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:34,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567830876] [2022-03-01 17:08:34,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:08:34,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:34,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:34,455 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) [2022-03-01 17:08:34,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 17:08:34,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:08:34,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:34,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:08:34,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:34,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:34,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567830876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:34,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:34,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 15 [2022-03-01 17:08:34,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592128661] [2022-03-01 17:08:34,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:34,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:08:34,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:34,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:08:34,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:08:34,714 INFO L87 Difference]: Start difference. First operand 2685 states and 6751 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 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) [2022-03-01 17:08:34,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:34,963 INFO L93 Difference]: Finished difference Result 3747 states and 9072 transitions. [2022-03-01 17:08:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:08:34,964 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 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 35 [2022-03-01 17:08:34,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:34,968 INFO L225 Difference]: With dead ends: 3747 [2022-03-01 17:08:34,968 INFO L226 Difference]: Without dead ends: 3693 [2022-03-01 17:08:34,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:08:34,969 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 266 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:34,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 155 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:34,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3693 states. [2022-03-01 17:08:34,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3693 to 2822. [2022-03-01 17:08:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2822 states, 2821 states have (on average 2.525345622119816) internal successors, (7124), 2821 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2822 states to 2822 states and 7124 transitions. [2022-03-01 17:08:35,004 INFO L78 Accepts]: Start accepts. Automaton has 2822 states and 7124 transitions. Word has length 35 [2022-03-01 17:08:35,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:35,004 INFO L470 AbstractCegarLoop]: Abstraction has 2822 states and 7124 transitions. [2022-03-01 17:08:35,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 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) [2022-03-01 17:08:35,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2822 states and 7124 transitions. [2022-03-01 17:08:35,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:35,007 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:35,007 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:35,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-01 17:08:35,215 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,SelfDestructingSolverStorable75 [2022-03-01 17:08:35,216 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:35,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:35,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1763440021, now seen corresponding path program 18 times [2022-03-01 17:08:35,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:35,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531378757] [2022-03-01 17:08:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:35,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:35,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:35,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531378757] [2022-03-01 17:08:35,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531378757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:35,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418055965] [2022-03-01 17:08:35,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:08:35,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:35,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:35,285 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) [2022-03-01 17:08:35,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 17:08:35,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 17:08:35,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:35,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:35,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:35,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:35,425 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:08:35,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:08:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:35,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418055965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:35,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:35,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-01 17:08:35,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65042743] [2022-03-01 17:08:35,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:35,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:08:35,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:35,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:08:35,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:08:35,491 INFO L87 Difference]: Start difference. First operand 2822 states and 7124 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:35,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:35,684 INFO L93 Difference]: Finished difference Result 3193 states and 7855 transitions. [2022-03-01 17:08:35,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:35,684 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:35,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:35,688 INFO L225 Difference]: With dead ends: 3193 [2022-03-01 17:08:35,688 INFO L226 Difference]: Without dead ends: 3120 [2022-03-01 17:08:35,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:35,688 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 74 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:35,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 152 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2022-03-01 17:08:35,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 2828. [2022-03-01 17:08:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.5107888220728687) internal successors, (7098), 2827 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7098 transitions. [2022-03-01 17:08:35,740 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7098 transitions. Word has length 35 [2022-03-01 17:08:35,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:35,740 INFO L470 AbstractCegarLoop]: Abstraction has 2828 states and 7098 transitions. [2022-03-01 17:08:35,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:35,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7098 transitions. [2022-03-01 17:08:35,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:35,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:35,744 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:35,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:35,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:35,959 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:35,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1241207638, now seen corresponding path program 12 times [2022-03-01 17:08:35,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:35,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657274219] [2022-03-01 17:08:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:35,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:36,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:36,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657274219] [2022-03-01 17:08:36,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657274219] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:36,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318029680] [2022-03-01 17:08:36,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:08:36,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:36,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:36,025 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) [2022-03-01 17:08:36,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 17:08:36,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 17:08:36,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:36,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:08:36,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:36,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:36,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318029680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:36,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:36,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-03-01 17:08:36,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043842084] [2022-03-01 17:08:36,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:36,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:08:36,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:36,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:08:36,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:08:36,340 INFO L87 Difference]: Start difference. First operand 2828 states and 7098 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:36,561 INFO L93 Difference]: Finished difference Result 4521 states and 11004 transitions. [2022-03-01 17:08:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:08:36,561 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:36,567 INFO L225 Difference]: With dead ends: 4521 [2022-03-01 17:08:36,567 INFO L226 Difference]: Without dead ends: 4497 [2022-03-01 17:08:36,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:08:36,567 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 183 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:36,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 163 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4497 states. [2022-03-01 17:08:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4497 to 3230. [2022-03-01 17:08:36,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 2.573552183338495) internal successors, (8310), 3229 states have internal predecessors, (8310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:36,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 8310 transitions. [2022-03-01 17:08:36,608 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 8310 transitions. Word has length 35 [2022-03-01 17:08:36,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:36,608 INFO L470 AbstractCegarLoop]: Abstraction has 3230 states and 8310 transitions. [2022-03-01 17:08:36,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:36,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 8310 transitions. [2022-03-01 17:08:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:36,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:36,611 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:36,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-01 17:08:36,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:36,823 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:36,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:36,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1863088048, now seen corresponding path program 13 times [2022-03-01 17:08:36,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:36,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745110274] [2022-03-01 17:08:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:36,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:36,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:36,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745110274] [2022-03-01 17:08:36,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745110274] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:36,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600428656] [2022-03-01 17:08:36,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:08:36,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:36,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:36,891 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) [2022-03-01 17:08:36,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 17:08:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:36,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:08:36,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:37,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:37,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600428656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:37,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:37,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-03-01 17:08:37,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176195528] [2022-03-01 17:08:37,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:37,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:08:37,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:37,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:08:37,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:08:37,183 INFO L87 Difference]: Start difference. First operand 3230 states and 8310 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:37,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:37,456 INFO L93 Difference]: Finished difference Result 4879 states and 11741 transitions. [2022-03-01 17:08:37,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:08:37,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:37,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:37,462 INFO L225 Difference]: With dead ends: 4879 [2022-03-01 17:08:37,462 INFO L226 Difference]: Without dead ends: 4879 [2022-03-01 17:08:37,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:08:37,463 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 280 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:37,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 127 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:37,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2022-03-01 17:08:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 3069. [2022-03-01 17:08:37,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 3068 states have (on average 2.5642112125162972) internal successors, (7867), 3068 states have internal predecessors, (7867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 7867 transitions. [2022-03-01 17:08:37,513 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 7867 transitions. Word has length 35 [2022-03-01 17:08:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:37,513 INFO L470 AbstractCegarLoop]: Abstraction has 3069 states and 7867 transitions. [2022-03-01 17:08:37,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 7867 transitions. [2022-03-01 17:08:37,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:37,515 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:37,515 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:37,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-01 17:08:37,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-01 17:08:37,716 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:37,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1764899259, now seen corresponding path program 14 times [2022-03-01 17:08:37,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:37,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269048692] [2022-03-01 17:08:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:37,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:37,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:37,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269048692] [2022-03-01 17:08:37,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269048692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:37,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798634225] [2022-03-01 17:08:37,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:08:37,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:37,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:37,795 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) [2022-03-01 17:08:37,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 17:08:37,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:08:37,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:37,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:37,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:37,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:37,919 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:08:37,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:08:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:37,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798634225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:37,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:37,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-01 17:08:37,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643918223] [2022-03-01 17:08:37,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:37,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:08:37,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:37,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:08:37,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:08:37,983 INFO L87 Difference]: Start difference. First operand 3069 states and 7867 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:38,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:38,158 INFO L93 Difference]: Finished difference Result 3861 states and 9520 transitions. [2022-03-01 17:08:38,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:38,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:38,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:38,162 INFO L225 Difference]: With dead ends: 3861 [2022-03-01 17:08:38,162 INFO L226 Difference]: Without dead ends: 3841 [2022-03-01 17:08:38,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:38,163 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 107 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:38,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 157 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2022-03-01 17:08:38,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 3043. [2022-03-01 17:08:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 2.553911900065746) internal successors, (7769), 3042 states have internal predecessors, (7769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 7769 transitions. [2022-03-01 17:08:38,212 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 7769 transitions. Word has length 35 [2022-03-01 17:08:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:38,212 INFO L470 AbstractCegarLoop]: Abstraction has 3043 states and 7769 transitions. [2022-03-01 17:08:38,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 7769 transitions. [2022-03-01 17:08:38,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:38,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:38,215 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:38,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:38,432 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,SelfDestructingSolverStorable79 [2022-03-01 17:08:38,432 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:38,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1029735045, now seen corresponding path program 19 times [2022-03-01 17:08:38,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:38,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215056948] [2022-03-01 17:08:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:38,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:38,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:38,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215056948] [2022-03-01 17:08:38,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215056948] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:38,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698594606] [2022-03-01 17:08:38,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:08:38,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:38,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:38,503 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) [2022-03-01 17:08:38,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 17:08:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:38,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:38,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:38,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:38,638 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:08:38,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:08:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:38,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698594606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:38,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:38,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-01 17:08:38,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963334748] [2022-03-01 17:08:38,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:38,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:08:38,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:38,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:08:38,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:08:38,700 INFO L87 Difference]: Start difference. First operand 3043 states and 7769 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:38,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:38,929 INFO L93 Difference]: Finished difference Result 3496 states and 8631 transitions. [2022-03-01 17:08:38,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:38,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:38,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:38,933 INFO L225 Difference]: With dead ends: 3496 [2022-03-01 17:08:38,933 INFO L226 Difference]: Without dead ends: 3430 [2022-03-01 17:08:38,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:38,934 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 70 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:38,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 213 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:38,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2022-03-01 17:08:38,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 2999. [2022-03-01 17:08:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 2.543695797198132) internal successors, (7626), 2998 states have internal predecessors, (7626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 7626 transitions. [2022-03-01 17:08:38,968 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 7626 transitions. Word has length 35 [2022-03-01 17:08:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:38,968 INFO L470 AbstractCegarLoop]: Abstraction has 2999 states and 7626 transitions. [2022-03-01 17:08:38,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 7626 transitions. [2022-03-01 17:08:38,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:38,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:38,971 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:38,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-01 17:08:39,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:39,173 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:39,174 INFO L85 PathProgramCache]: Analyzing trace with hash 653482643, now seen corresponding path program 20 times [2022-03-01 17:08:39,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:39,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459536184] [2022-03-01 17:08:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:39,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:39,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:39,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459536184] [2022-03-01 17:08:39,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459536184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:39,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284910726] [2022-03-01 17:08:39,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:08:39,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:39,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:39,255 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) [2022-03-01 17:08:39,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 17:08:39,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:08:39,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:39,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:39,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:39,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:39,400 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:39,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:39,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284910726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:39,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:39,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:08:39,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274526551] [2022-03-01 17:08:39,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:39,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:08:39,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:39,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:08:39,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:08:39,452 INFO L87 Difference]: Start difference. First operand 2999 states and 7626 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:39,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:39,701 INFO L93 Difference]: Finished difference Result 3778 states and 9159 transitions. [2022-03-01 17:08:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:08:39,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:39,705 INFO L225 Difference]: With dead ends: 3778 [2022-03-01 17:08:39,705 INFO L226 Difference]: Without dead ends: 3706 [2022-03-01 17:08:39,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:08:39,706 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 160 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:39,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 218 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:39,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2022-03-01 17:08:39,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 3002. [2022-03-01 17:08:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 2.525824725091636) internal successors, (7580), 3001 states have internal predecessors, (7580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 7580 transitions. [2022-03-01 17:08:39,738 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 7580 transitions. Word has length 35 [2022-03-01 17:08:39,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:39,738 INFO L470 AbstractCegarLoop]: Abstraction has 3002 states and 7580 transitions. [2022-03-01 17:08:39,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 7580 transitions. [2022-03-01 17:08:39,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:39,741 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:39,741 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:39,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-01 17:08:39,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:39,942 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:39,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:39,942 INFO L85 PathProgramCache]: Analyzing trace with hash 760940392, now seen corresponding path program 15 times [2022-03-01 17:08:39,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:39,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754009065] [2022-03-01 17:08:39,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:39,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:40,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:40,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754009065] [2022-03-01 17:08:40,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754009065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:40,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997362982] [2022-03-01 17:08:40,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:08:40,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:40,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:40,032 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) [2022-03-01 17:08:40,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 17:08:40,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-01 17:08:40,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:40,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:08:40,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:40,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:40,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997362982] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:40,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:40,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-03-01 17:08:40,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354318818] [2022-03-01 17:08:40,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:40,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:08:40,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:40,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:08:40,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:08:40,357 INFO L87 Difference]: Start difference. First operand 3002 states and 7580 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:40,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:40,674 INFO L93 Difference]: Finished difference Result 4480 states and 10890 transitions. [2022-03-01 17:08:40,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:08:40,674 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:40,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:40,681 INFO L225 Difference]: With dead ends: 4480 [2022-03-01 17:08:40,681 INFO L226 Difference]: Without dead ends: 4480 [2022-03-01 17:08:40,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:08:40,681 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 242 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:40,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 167 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:40,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4480 states. [2022-03-01 17:08:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4480 to 3156. [2022-03-01 17:08:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3155 states have (on average 2.555309033280507) internal successors, (8062), 3155 states have internal predecessors, (8062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:40,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 8062 transitions. [2022-03-01 17:08:40,727 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 8062 transitions. Word has length 35 [2022-03-01 17:08:40,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:40,727 INFO L470 AbstractCegarLoop]: Abstraction has 3156 states and 8062 transitions. [2022-03-01 17:08:40,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:40,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 8062 transitions. [2022-03-01 17:08:40,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:40,731 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:40,731 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:40,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-01 17:08:40,953 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,SelfDestructingSolverStorable82 [2022-03-01 17:08:40,953 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:40,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1040085320, now seen corresponding path program 21 times [2022-03-01 17:08:40,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:40,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977716499] [2022-03-01 17:08:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:40,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:41,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:41,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977716499] [2022-03-01 17:08:41,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977716499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:41,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156200709] [2022-03-01 17:08:41,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:08:41,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:41,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:41,044 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) [2022-03-01 17:08:41,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 17:08:41,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:08:41,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:41,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:08:41,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:41,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:41,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156200709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:41,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:41,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2022-03-01 17:08:41,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536796498] [2022-03-01 17:08:41,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:41,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:08:41,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:41,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:08:41,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:08:41,323 INFO L87 Difference]: Start difference. First operand 3156 states and 8062 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:41,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:41,521 INFO L93 Difference]: Finished difference Result 4155 states and 10324 transitions. [2022-03-01 17:08:41,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:08:41,521 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:41,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:41,526 INFO L225 Difference]: With dead ends: 4155 [2022-03-01 17:08:41,526 INFO L226 Difference]: Without dead ends: 4072 [2022-03-01 17:08:41,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:08:41,526 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 199 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:41,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 99 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:41,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4072 states. [2022-03-01 17:08:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4072 to 3305. [2022-03-01 17:08:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 3304 states have (on average 2.5614406779661016) internal successors, (8463), 3304 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 8463 transitions. [2022-03-01 17:08:41,584 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 8463 transitions. Word has length 35 [2022-03-01 17:08:41,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:41,584 INFO L470 AbstractCegarLoop]: Abstraction has 3305 states and 8463 transitions. [2022-03-01 17:08:41,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 8463 transitions. [2022-03-01 17:08:41,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:41,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:41,587 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:41,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-01 17:08:41,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:41,787 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:41,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:41,788 INFO L85 PathProgramCache]: Analyzing trace with hash 732247778, now seen corresponding path program 22 times [2022-03-01 17:08:41,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:41,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303839900] [2022-03-01 17:08:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:41,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:41,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:41,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303839900] [2022-03-01 17:08:41,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303839900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:41,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169354068] [2022-03-01 17:08:41,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:08:41,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:41,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:41,886 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) [2022-03-01 17:08:41,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 17:08:41,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:08:41,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:41,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:08:41,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:42,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:42,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169354068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:42,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:42,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2022-03-01 17:08:42,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997322866] [2022-03-01 17:08:42,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:42,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:08:42,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:42,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:08:42,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:08:42,329 INFO L87 Difference]: Start difference. First operand 3305 states and 8463 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:42,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:42,635 INFO L93 Difference]: Finished difference Result 4460 states and 10988 transitions. [2022-03-01 17:08:42,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:08:42,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:42,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:42,641 INFO L225 Difference]: With dead ends: 4460 [2022-03-01 17:08:42,641 INFO L226 Difference]: Without dead ends: 4460 [2022-03-01 17:08:42,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:08:42,641 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 172 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:42,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 146 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:42,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2022-03-01 17:08:42,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3173. [2022-03-01 17:08:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 3172 states have (on average 2.5453972257250945) internal successors, (8074), 3172 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 8074 transitions. [2022-03-01 17:08:42,687 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 8074 transitions. Word has length 35 [2022-03-01 17:08:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:42,687 INFO L470 AbstractCegarLoop]: Abstraction has 3173 states and 8074 transitions. [2022-03-01 17:08:42,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 8074 transitions. [2022-03-01 17:08:42,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:42,690 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:42,691 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:42,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-01 17:08:42,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:42,904 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:42,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:42,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2009131819, now seen corresponding path program 16 times [2022-03-01 17:08:42,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:42,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562174225] [2022-03-01 17:08:42,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:42,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:42,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:42,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562174225] [2022-03-01 17:08:42,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562174225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:42,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287814773] [2022-03-01 17:08:42,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:08:42,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:42,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:42,977 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) [2022-03-01 17:08:42,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 17:08:42,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:08:42,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:43,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:43,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:43,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:43,110 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:43,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:43,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287814773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:43,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:43,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:08:43,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521909358] [2022-03-01 17:08:43,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:43,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:08:43,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:43,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:08:43,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:08:43,154 INFO L87 Difference]: Start difference. First operand 3173 states and 8074 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:43,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:43,372 INFO L93 Difference]: Finished difference Result 3824 states and 9404 transitions. [2022-03-01 17:08:43,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:08:43,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:43,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:43,377 INFO L225 Difference]: With dead ends: 3824 [2022-03-01 17:08:43,377 INFO L226 Difference]: Without dead ends: 3806 [2022-03-01 17:08:43,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:08:43,377 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 87 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:43,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 134 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:43,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2022-03-01 17:08:43,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3089. [2022-03-01 17:08:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3089 states, 3088 states have (on average 2.5333549222797926) internal successors, (7823), 3088 states have internal predecessors, (7823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3089 states to 3089 states and 7823 transitions. [2022-03-01 17:08:43,413 INFO L78 Accepts]: Start accepts. Automaton has 3089 states and 7823 transitions. Word has length 35 [2022-03-01 17:08:43,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:43,413 INFO L470 AbstractCegarLoop]: Abstraction has 3089 states and 7823 transitions. [2022-03-01 17:08:43,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:43,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3089 states and 7823 transitions. [2022-03-01 17:08:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:43,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:43,417 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:43,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:43,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:43,635 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:43,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:43,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2108944533, now seen corresponding path program 23 times [2022-03-01 17:08:43,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:43,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681889301] [2022-03-01 17:08:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:43,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:43,723 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:43,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681889301] [2022-03-01 17:08:43,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681889301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:43,723 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139921435] [2022-03-01 17:08:43,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:08:43,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:43,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:43,724 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) [2022-03-01 17:08:43,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-01 17:08:43,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 17:08:43,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:43,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:43,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:43,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:43,956 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:43,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:44,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139921435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:44,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:44,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-01 17:08:44,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787202919] [2022-03-01 17:08:44,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:44,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:08:44,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:44,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:08:44,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:08:44,006 INFO L87 Difference]: Start difference. First operand 3089 states and 7823 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:44,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:44,230 INFO L93 Difference]: Finished difference Result 3205 states and 8027 transitions. [2022-03-01 17:08:44,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:44,231 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:44,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:44,235 INFO L225 Difference]: With dead ends: 3205 [2022-03-01 17:08:44,235 INFO L226 Difference]: Without dead ends: 3165 [2022-03-01 17:08:44,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:08:44,235 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 59 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:44,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 166 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:44,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2022-03-01 17:08:44,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 3065. [2022-03-01 17:08:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 3064 states have (on average 2.5277415143603132) internal successors, (7745), 3064 states have internal predecessors, (7745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 7745 transitions. [2022-03-01 17:08:44,268 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 7745 transitions. Word has length 35 [2022-03-01 17:08:44,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:44,269 INFO L470 AbstractCegarLoop]: Abstraction has 3065 states and 7745 transitions. [2022-03-01 17:08:44,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 7745 transitions. [2022-03-01 17:08:44,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:44,271 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:44,271 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:44,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-01 17:08:44,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-03-01 17:08:44,472 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:44,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:44,472 INFO L85 PathProgramCache]: Analyzing trace with hash -672333215, now seen corresponding path program 24 times [2022-03-01 17:08:44,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:44,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249462064] [2022-03-01 17:08:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:44,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:08:44,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:44,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249462064] [2022-03-01 17:08:44,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249462064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:44,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855183701] [2022-03-01 17:08:44,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:08:44,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:44,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:44,558 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) [2022-03-01 17:08:44,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-01 17:08:44,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-01 17:08:44,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:44,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:44,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:08:44,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:44,686 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:08:44,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:08:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:08:44,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855183701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:44,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:44,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-01 17:08:44,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036229877] [2022-03-01 17:08:44,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:44,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:08:44,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:44,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:08:44,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:08:44,751 INFO L87 Difference]: Start difference. First operand 3065 states and 7745 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:44,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:44,883 INFO L93 Difference]: Finished difference Result 3420 states and 8465 transitions. [2022-03-01 17:08:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:44,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:44,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:44,888 INFO L225 Difference]: With dead ends: 3420 [2022-03-01 17:08:44,888 INFO L226 Difference]: Without dead ends: 3408 [2022-03-01 17:08:44,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 12 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:44,888 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:44,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 61 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:44,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2022-03-01 17:08:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 3025. [2022-03-01 17:08:44,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 2.5221560846560847) internal successors, (7627), 3024 states have internal predecessors, (7627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 7627 transitions. [2022-03-01 17:08:44,919 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 7627 transitions. Word has length 35 [2022-03-01 17:08:44,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:44,919 INFO L470 AbstractCegarLoop]: Abstraction has 3025 states and 7627 transitions. [2022-03-01 17:08:44,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:44,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 7627 transitions. [2022-03-01 17:08:44,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:44,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:44,921 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:44,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-01 17:08:45,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-01 17:08:45,122 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:45,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:45,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1641585207, now seen corresponding path program 25 times [2022-03-01 17:08:45,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:45,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773990131] [2022-03-01 17:08:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:45,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:45,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:45,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773990131] [2022-03-01 17:08:45,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773990131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:45,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803881393] [2022-03-01 17:08:45,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:08:45,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:45,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:45,212 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) [2022-03-01 17:08:45,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-01 17:08:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:45,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:45,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:45,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:45,413 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:45,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:45,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803881393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:45,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:45,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:08:45,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044367767] [2022-03-01 17:08:45,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:45,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:08:45,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:45,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:08:45,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:08:45,467 INFO L87 Difference]: Start difference. First operand 3025 states and 7627 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:45,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:45,669 INFO L93 Difference]: Finished difference Result 3140 states and 7833 transitions. [2022-03-01 17:08:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:45,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:45,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:45,674 INFO L225 Difference]: With dead ends: 3140 [2022-03-01 17:08:45,674 INFO L226 Difference]: Without dead ends: 3117 [2022-03-01 17:08:45,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:08:45,674 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 62 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:45,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 135 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2022-03-01 17:08:45,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 3009. [2022-03-01 17:08:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.5189494680851063) internal successors, (7577), 3008 states have internal predecessors, (7577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 7577 transitions. [2022-03-01 17:08:45,706 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 7577 transitions. Word has length 35 [2022-03-01 17:08:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:45,706 INFO L470 AbstractCegarLoop]: Abstraction has 3009 states and 7577 transitions. [2022-03-01 17:08:45,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 7577 transitions. [2022-03-01 17:08:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:45,708 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:45,708 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:45,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-01 17:08:45,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-01 17:08:45,909 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:45,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1220962274, now seen corresponding path program 26 times [2022-03-01 17:08:45,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:45,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943038072] [2022-03-01 17:08:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:45,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:45,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:45,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943038072] [2022-03-01 17:08:45,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943038072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:45,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532017520] [2022-03-01 17:08:45,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:08:45,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:45,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:45,970 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) [2022-03-01 17:08:45,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-01 17:08:45,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:08:45,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:45,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:08:45,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:46,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:46,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532017520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:46,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:46,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-03-01 17:08:46,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691819367] [2022-03-01 17:08:46,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:46,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:08:46,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:46,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:08:46,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:46,273 INFO L87 Difference]: Start difference. First operand 3009 states and 7577 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:46,498 INFO L93 Difference]: Finished difference Result 4143 states and 10150 transitions. [2022-03-01 17:08:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:08:46,499 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:46,504 INFO L225 Difference]: With dead ends: 4143 [2022-03-01 17:08:46,504 INFO L226 Difference]: Without dead ends: 4143 [2022-03-01 17:08:46,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=218, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:08:46,504 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 154 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:46,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 97 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:46,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2022-03-01 17:08:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 3285. [2022-03-01 17:08:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3285 states, 3284 states have (on average 2.5569427527405604) internal successors, (8397), 3284 states have internal predecessors, (8397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3285 states to 3285 states and 8397 transitions. [2022-03-01 17:08:46,546 INFO L78 Accepts]: Start accepts. Automaton has 3285 states and 8397 transitions. Word has length 35 [2022-03-01 17:08:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:46,546 INFO L470 AbstractCegarLoop]: Abstraction has 3285 states and 8397 transitions. [2022-03-01 17:08:46,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:46,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3285 states and 8397 transitions. [2022-03-01 17:08:46,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:46,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:46,549 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:46,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-01 17:08:46,749 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,SelfDestructingSolverStorable89 [2022-03-01 17:08:46,749 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:46,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:46,749 INFO L85 PathProgramCache]: Analyzing trace with hash 982900757, now seen corresponding path program 17 times [2022-03-01 17:08:46,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:46,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339362132] [2022-03-01 17:08:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:46,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:46,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:46,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339362132] [2022-03-01 17:08:46,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339362132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:46,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980538463] [2022-03-01 17:08:46,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:08:46,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:46,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:46,820 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) [2022-03-01 17:08:46,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-01 17:08:46,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 17:08:46,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:46,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:46,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:46,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:46,958 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:08:46,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:08:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:47,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980538463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:47,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:47,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-01 17:08:47,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260995745] [2022-03-01 17:08:47,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:47,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:08:47,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:47,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:08:47,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:08:47,026 INFO L87 Difference]: Start difference. First operand 3285 states and 8397 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:47,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:47,242 INFO L93 Difference]: Finished difference Result 3741 states and 9357 transitions. [2022-03-01 17:08:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:47,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:47,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:47,247 INFO L225 Difference]: With dead ends: 3741 [2022-03-01 17:08:47,247 INFO L226 Difference]: Without dead ends: 3732 [2022-03-01 17:08:47,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:47,247 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 78 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:47,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 169 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2022-03-01 17:08:47,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 3312. [2022-03-01 17:08:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3312 states, 3311 states have (on average 2.5572334642102086) internal successors, (8467), 3311 states have internal predecessors, (8467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3312 states to 3312 states and 8467 transitions. [2022-03-01 17:08:47,283 INFO L78 Accepts]: Start accepts. Automaton has 3312 states and 8467 transitions. Word has length 35 [2022-03-01 17:08:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:47,283 INFO L470 AbstractCegarLoop]: Abstraction has 3312 states and 8467 transitions. [2022-03-01 17:08:47,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3312 states and 8467 transitions. [2022-03-01 17:08:47,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:47,286 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:47,286 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:47,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:47,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:47,486 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:47,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:47,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1811733547, now seen corresponding path program 27 times [2022-03-01 17:08:47,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:47,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277341760] [2022-03-01 17:08:47,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:47,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:47,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:47,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277341760] [2022-03-01 17:08:47,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277341760] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:47,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903534014] [2022-03-01 17:08:47,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:08:47,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:47,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:47,559 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) [2022-03-01 17:08:47,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-01 17:08:47,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 17:08:47,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:47,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:47,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:47,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:47,687 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:08:47,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:08:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:47,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903534014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:47,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:47,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-01 17:08:47,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427581400] [2022-03-01 17:08:47,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:47,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:08:47,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:47,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:08:47,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:08:47,750 INFO L87 Difference]: Start difference. First operand 3312 states and 8467 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:47,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:47,953 INFO L93 Difference]: Finished difference Result 3617 states and 9043 transitions. [2022-03-01 17:08:47,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:47,953 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:47,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:47,957 INFO L225 Difference]: With dead ends: 3617 [2022-03-01 17:08:47,957 INFO L226 Difference]: Without dead ends: 3536 [2022-03-01 17:08:47,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:47,958 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 89 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:47,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 156 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:47,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2022-03-01 17:08:47,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 3211. [2022-03-01 17:08:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3211 states, 3210 states have (on average 2.5707165109034267) internal successors, (8252), 3210 states have internal predecessors, (8252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:47,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3211 states to 3211 states and 8252 transitions. [2022-03-01 17:08:47,993 INFO L78 Accepts]: Start accepts. Automaton has 3211 states and 8252 transitions. Word has length 35 [2022-03-01 17:08:47,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:47,993 INFO L470 AbstractCegarLoop]: Abstraction has 3211 states and 8252 transitions. [2022-03-01 17:08:47,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:47,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3211 states and 8252 transitions. [2022-03-01 17:08:47,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:47,995 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:47,995 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:48,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-01 17:08:48,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:48,196 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:48,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:48,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1869697569, now seen corresponding path program 28 times [2022-03-01 17:08:48,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:48,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011355370] [2022-03-01 17:08:48,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:48,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:48,266 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:48,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:48,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011355370] [2022-03-01 17:08:48,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011355370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:48,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007013972] [2022-03-01 17:08:48,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:08:48,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:48,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:48,268 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) [2022-03-01 17:08:48,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-01 17:08:48,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:08:48,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:48,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:48,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:48,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:48,386 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:08:48,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:08:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:08:48,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007013972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:48,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:48,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-01 17:08:48,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138791141] [2022-03-01 17:08:48,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:48,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:08:48,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:48,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:08:48,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:08:48,450 INFO L87 Difference]: Start difference. First operand 3211 states and 8252 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:48,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:48,617 INFO L93 Difference]: Finished difference Result 3558 states and 8978 transitions. [2022-03-01 17:08:48,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:08:48,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:48,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:48,621 INFO L225 Difference]: With dead ends: 3558 [2022-03-01 17:08:48,621 INFO L226 Difference]: Without dead ends: 3546 [2022-03-01 17:08:48,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:08:48,622 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:48,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 143 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2022-03-01 17:08:48,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 3213. [2022-03-01 17:08:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 2.5703611457036115) internal successors, (8256), 3212 states have internal predecessors, (8256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:48,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 8256 transitions. [2022-03-01 17:08:48,657 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 8256 transitions. Word has length 35 [2022-03-01 17:08:48,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:48,657 INFO L470 AbstractCegarLoop]: Abstraction has 3213 states and 8256 transitions. [2022-03-01 17:08:48,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:48,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 8256 transitions. [2022-03-01 17:08:48,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:48,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:48,660 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:48,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:48,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:48,860 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:48,860 INFO L85 PathProgramCache]: Analyzing trace with hash -283352393, now seen corresponding path program 29 times [2022-03-01 17:08:48,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:48,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631077413] [2022-03-01 17:08:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:48,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:48,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:48,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631077413] [2022-03-01 17:08:48,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631077413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:48,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604265276] [2022-03-01 17:08:48,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:08:48,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:48,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:48,928 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) [2022-03-01 17:08:48,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-01 17:08:48,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 17:08:48,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:48,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:48,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:49,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:49,091 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:49,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:49,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604265276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:49,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:49,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-01 17:08:49,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084273277] [2022-03-01 17:08:49,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:49,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:08:49,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:49,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:08:49,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:08:49,163 INFO L87 Difference]: Start difference. First operand 3213 states and 8256 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:49,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:49,504 INFO L93 Difference]: Finished difference Result 4231 states and 10491 transitions. [2022-03-01 17:08:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:08:49,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:49,510 INFO L225 Difference]: With dead ends: 4231 [2022-03-01 17:08:49,510 INFO L226 Difference]: Without dead ends: 4177 [2022-03-01 17:08:49,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:08:49,511 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 194 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:49,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 185 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2022-03-01 17:08:49,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 3248. [2022-03-01 17:08:49,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3247 states have (on average 2.574684323991377) internal successors, (8360), 3247 states have internal predecessors, (8360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:49,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 8360 transitions. [2022-03-01 17:08:49,565 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 8360 transitions. Word has length 35 [2022-03-01 17:08:49,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:49,565 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 8360 transitions. [2022-03-01 17:08:49,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 8360 transitions. [2022-03-01 17:08:49,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:49,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:49,568 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:49,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:49,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:49,783 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:49,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash -128515859, now seen corresponding path program 30 times [2022-03-01 17:08:49,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:49,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508488534] [2022-03-01 17:08:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:49,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:49,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:49,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508488534] [2022-03-01 17:08:49,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508488534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:49,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026384023] [2022-03-01 17:08:49,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:08:49,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:49,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:49,864 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) [2022-03-01 17:08:49,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-01 17:08:49,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 17:08:49,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:49,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:49,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:49,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:50,003 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:50,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:50,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026384023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:50,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:50,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:08:50,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334659304] [2022-03-01 17:08:50,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:50,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:08:50,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:50,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:08:50,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:08:50,056 INFO L87 Difference]: Start difference. First operand 3248 states and 8360 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:50,442 INFO L93 Difference]: Finished difference Result 5007 states and 12333 transitions. [2022-03-01 17:08:50,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:08:50,442 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-01 17:08:50,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:50,448 INFO L225 Difference]: With dead ends: 5007 [2022-03-01 17:08:50,448 INFO L226 Difference]: Without dead ends: 4893 [2022-03-01 17:08:50,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:08:50,449 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 371 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:50,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 188 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:08:50,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4893 states. [2022-03-01 17:08:50,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4893 to 3400. [2022-03-01 17:08:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3400 states, 3399 states have (on average 2.5763459841129746) internal successors, (8757), 3399 states have internal predecessors, (8757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 8757 transitions. [2022-03-01 17:08:50,496 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 8757 transitions. Word has length 35 [2022-03-01 17:08:50,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:50,496 INFO L470 AbstractCegarLoop]: Abstraction has 3400 states and 8757 transitions. [2022-03-01 17:08:50,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:50,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 8757 transitions. [2022-03-01 17:08:50,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-01 17:08:50,499 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:50,499 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:50,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-01 17:08:50,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:50,699 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:50,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:50,700 INFO L85 PathProgramCache]: Analyzing trace with hash -188207369, now seen corresponding path program 31 times [2022-03-01 17:08:50,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:50,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297135170] [2022-03-01 17:08:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:50,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:50,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:50,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297135170] [2022-03-01 17:08:50,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297135170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:50,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786212564] [2022-03-01 17:08:50,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:08:50,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:50,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:50,778 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) [2022-03-01 17:08:50,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-01 17:08:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:50,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:08:50,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:50,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:08:50,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-01 17:08:50,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:08:50,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2022-03-01 17:08:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:50,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:51,080 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:08:51,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:08:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:51,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786212564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:51,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:51,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 23 [2022-03-01 17:08:51,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728741513] [2022-03-01 17:08:51,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:51,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:08:51,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:51,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:08:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:08:51,181 INFO L87 Difference]: Start difference. First operand 3400 states and 8757 transitions. Second operand has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 23 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) [2022-03-01 17:08:52,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:52,495 INFO L93 Difference]: Finished difference Result 8077 states and 19270 transitions. [2022-03-01 17:08:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 17:08:52,496 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 23 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 35 [2022-03-01 17:08:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:52,506 INFO L225 Difference]: With dead ends: 8077 [2022-03-01 17:08:52,506 INFO L226 Difference]: Without dead ends: 7838 [2022-03-01 17:08:52,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=646, Invalid=3644, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 17:08:52,507 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 724 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:52,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [724 Valid, 830 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:08:52,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7838 states. [2022-03-01 17:08:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7838 to 4698. [2022-03-01 17:08:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4698 states, 4697 states have (on average 2.585480093676815) internal successors, (12144), 4697 states have internal predecessors, (12144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:52,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 12144 transitions. [2022-03-01 17:08:52,593 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 12144 transitions. Word has length 35 [2022-03-01 17:08:52,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:52,593 INFO L470 AbstractCegarLoop]: Abstraction has 4698 states and 12144 transitions. [2022-03-01 17:08:52,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 23 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) [2022-03-01 17:08:52,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 12144 transitions. [2022-03-01 17:08:52,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 17:08:52,597 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:52,597 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:52,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-01 17:08:52,797 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,SelfDestructingSolverStorable95 [2022-03-01 17:08:52,797 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:52,798 INFO L85 PathProgramCache]: Analyzing trace with hash 237519579, now seen corresponding path program 32 times [2022-03-01 17:08:52,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:52,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080051476] [2022-03-01 17:08:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:52,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:08:52,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:52,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080051476] [2022-03-01 17:08:52,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080051476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:52,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317447484] [2022-03-01 17:08:52,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:08:52,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:52,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:52,864 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) [2022-03-01 17:08:52,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-01 17:08:52,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:08:52,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:52,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:08:52,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:53,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:53,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317447484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:53,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:53,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 16 [2022-03-01 17:08:53,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362644947] [2022-03-01 17:08:53,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:53,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:08:53,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:53,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:08:53,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:08:53,324 INFO L87 Difference]: Start difference. First operand 4698 states and 12144 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 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) [2022-03-01 17:08:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:54,009 INFO L93 Difference]: Finished difference Result 5956 states and 14888 transitions. [2022-03-01 17:08:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:08:54,010 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-01 17:08:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:54,020 INFO L225 Difference]: With dead ends: 5956 [2022-03-01 17:08:54,020 INFO L226 Difference]: Without dead ends: 5906 [2022-03-01 17:08:54,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:08:54,021 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 382 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:54,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 367 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:08:54,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5906 states. [2022-03-01 17:08:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5906 to 5198. [2022-03-01 17:08:54,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5198 states, 5197 states have (on average 2.5684048489513183) internal successors, (13348), 5197 states have internal predecessors, (13348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5198 states to 5198 states and 13348 transitions. [2022-03-01 17:08:54,146 INFO L78 Accepts]: Start accepts. Automaton has 5198 states and 13348 transitions. Word has length 38 [2022-03-01 17:08:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:54,146 INFO L470 AbstractCegarLoop]: Abstraction has 5198 states and 13348 transitions. [2022-03-01 17:08:54,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 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) [2022-03-01 17:08:54,146 INFO L276 IsEmpty]: Start isEmpty. Operand 5198 states and 13348 transitions. [2022-03-01 17:08:54,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 17:08:54,152 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:54,152 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:54,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:54,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-01 17:08:54,365 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:54,365 INFO L85 PathProgramCache]: Analyzing trace with hash 72205555, now seen corresponding path program 33 times [2022-03-01 17:08:54,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:54,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869254246] [2022-03-01 17:08:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:54,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 17:08:54,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:54,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869254246] [2022-03-01 17:08:54,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869254246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:54,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043173096] [2022-03-01 17:08:54,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:08:54,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:54,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:54,433 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) [2022-03-01 17:08:54,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-01 17:08:54,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 17:08:54,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:54,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:08:54,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 17:08:54,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 17:08:54,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043173096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:54,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:54,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-03-01 17:08:54,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310642550] [2022-03-01 17:08:54,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:54,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:08:54,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:54,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:08:54,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:08:54,676 INFO L87 Difference]: Start difference. First operand 5198 states and 13348 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:54,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:54,830 INFO L93 Difference]: Finished difference Result 5899 states and 14827 transitions. [2022-03-01 17:08:54,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:08:54,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-01 17:08:54,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:54,838 INFO L225 Difference]: With dead ends: 5899 [2022-03-01 17:08:54,838 INFO L226 Difference]: Without dead ends: 5847 [2022-03-01 17:08:54,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 12 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:08:54,839 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 57 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:54,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 156 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:08:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5847 states. [2022-03-01 17:08:54,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5847 to 5208. [2022-03-01 17:08:54,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5208 states, 5207 states have (on average 2.563088150566545) internal successors, (13346), 5207 states have internal predecessors, (13346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5208 states to 5208 states and 13346 transitions. [2022-03-01 17:08:54,917 INFO L78 Accepts]: Start accepts. Automaton has 5208 states and 13346 transitions. Word has length 38 [2022-03-01 17:08:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:54,917 INFO L470 AbstractCegarLoop]: Abstraction has 5208 states and 13346 transitions. [2022-03-01 17:08:54,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 5208 states and 13346 transitions. [2022-03-01 17:08:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 17:08:54,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:54,922 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:54,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-01 17:08:55,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:55,122 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:55,123 INFO L85 PathProgramCache]: Analyzing trace with hash 784212400, now seen corresponding path program 18 times [2022-03-01 17:08:55,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:55,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938722743] [2022-03-01 17:08:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:55,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-01 17:08:55,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:55,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938722743] [2022-03-01 17:08:55,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938722743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:55,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487899470] [2022-03-01 17:08:55,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:08:55,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:55,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:55,185 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) [2022-03-01 17:08:55,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-01 17:08:55,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-01 17:08:55,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:55,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:08:55,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 40 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:55,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 40 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:55,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487899470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:55,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:55,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 13 [2022-03-01 17:08:55,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904531561] [2022-03-01 17:08:55,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:55,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:08:55,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:55,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:08:55,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:08:55,548 INFO L87 Difference]: Start difference. First operand 5208 states and 13346 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 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) [2022-03-01 17:08:55,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:55,895 INFO L93 Difference]: Finished difference Result 7225 states and 17694 transitions. [2022-03-01 17:08:55,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:08:55,896 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 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 38 [2022-03-01 17:08:55,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:55,906 INFO L225 Difference]: With dead ends: 7225 [2022-03-01 17:08:55,906 INFO L226 Difference]: Without dead ends: 7173 [2022-03-01 17:08:55,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:08:55,907 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 288 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:55,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 256 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:08:55,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7173 states. [2022-03-01 17:08:55,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7173 to 4849. [2022-03-01 17:08:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 4848 states have (on average 2.540016501650165) internal successors, (12314), 4848 states have internal predecessors, (12314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:55,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 12314 transitions. [2022-03-01 17:08:55,983 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 12314 transitions. Word has length 38 [2022-03-01 17:08:55,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:55,983 INFO L470 AbstractCegarLoop]: Abstraction has 4849 states and 12314 transitions. [2022-03-01 17:08:55,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 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) [2022-03-01 17:08:55,983 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 12314 transitions. [2022-03-01 17:08:55,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-01 17:08:55,987 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:55,987 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:56,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-01 17:08:56,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:56,188 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:56,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:56,188 INFO L85 PathProgramCache]: Analyzing trace with hash 121942062, now seen corresponding path program 19 times [2022-03-01 17:08:56,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:56,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028941258] [2022-03-01 17:08:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:56,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:08:56,243 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:56,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028941258] [2022-03-01 17:08:56,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028941258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:56,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290823207] [2022-03-01 17:08:56,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:08:56,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:56,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:56,245 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) [2022-03-01 17:08:56,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-01 17:08:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:56,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-01 17:08:56,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:56,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:08:56,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290823207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:56,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:56,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 16 [2022-03-01 17:08:56,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608361873] [2022-03-01 17:08:56,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:56,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:08:56,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:56,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:08:56,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:08:56,604 INFO L87 Difference]: Start difference. First operand 4849 states and 12314 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 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) [2022-03-01 17:08:57,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:08:57,094 INFO L93 Difference]: Finished difference Result 6805 states and 16547 transitions. [2022-03-01 17:08:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:08:57,094 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-01 17:08:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:08:57,102 INFO L225 Difference]: With dead ends: 6805 [2022-03-01 17:08:57,102 INFO L226 Difference]: Without dead ends: 6716 [2022-03-01 17:08:57,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:08:57,102 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 328 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:08:57,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 340 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:08:57,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6716 states. [2022-03-01 17:08:57,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6716 to 4804. [2022-03-01 17:08:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4804 states, 4803 states have (on average 2.5363314595044764) internal successors, (12182), 4803 states have internal predecessors, (12182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:08:57,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4804 states to 4804 states and 12182 transitions. [2022-03-01 17:08:57,166 INFO L78 Accepts]: Start accepts. Automaton has 4804 states and 12182 transitions. Word has length 38 [2022-03-01 17:08:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:08:57,166 INFO L470 AbstractCegarLoop]: Abstraction has 4804 states and 12182 transitions. [2022-03-01 17:08:57,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 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) [2022-03-01 17:08:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4804 states and 12182 transitions. [2022-03-01 17:08:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:08:57,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:08:57,170 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:08:57,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-01 17:08:57,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:57,371 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:08:57,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:08:57,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1532856280, now seen corresponding path program 20 times [2022-03-01 17:08:57,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:08:57,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950769015] [2022-03-01 17:08:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:08:57,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:08:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:08:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:57,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:08:57,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950769015] [2022-03-01 17:08:57,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950769015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:08:57,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328086595] [2022-03-01 17:08:57,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:08:57,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:08:57,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:08:57,470 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) [2022-03-01 17:08:57,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-01 17:08:57,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:08:57,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:08:57,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:08:57,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:08:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 23 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:58,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:08:58,391 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:08:58,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:08:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:08:58,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328086595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:08:58,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:08:58,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 32 [2022-03-01 17:08:58,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165545782] [2022-03-01 17:08:58,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:08:58,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:08:58,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:08:58,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:08:58,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:08:58,466 INFO L87 Difference]: Start difference. First operand 4804 states and 12182 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:03,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:03,612 INFO L93 Difference]: Finished difference Result 13871 states and 32021 transitions. [2022-03-01 17:09:03,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-03-01 17:09:03,612 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:03,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:03,632 INFO L225 Difference]: With dead ends: 13871 [2022-03-01 17:09:03,632 INFO L226 Difference]: Without dead ends: 13424 [2022-03-01 17:09:03,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 131 SyntacticMatches, 19 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13336 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3748, Invalid=28832, Unknown=0, NotChecked=0, Total=32580 [2022-03-01 17:09:03,636 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1086 mSDsluCounter, 2823 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 2047 SdHoareTripleChecker+Invalid, 5473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3913 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:03,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 2047 Invalid, 5473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1486 Invalid, 0 Unknown, 3913 Unchecked, 0.6s Time] [2022-03-01 17:09:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13424 states. [2022-03-01 17:09:03,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13424 to 7078. [2022-03-01 17:09:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 7077 states have (on average 2.5611134661579764) internal successors, (18125), 7077 states have internal predecessors, (18125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 18125 transitions. [2022-03-01 17:09:03,782 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 18125 transitions. Word has length 41 [2022-03-01 17:09:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:03,782 INFO L470 AbstractCegarLoop]: Abstraction has 7078 states and 18125 transitions. [2022-03-01 17:09:03,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 32 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:03,782 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 18125 transitions. [2022-03-01 17:09:03,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:03,788 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:03,788 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:03,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-01 17:09:03,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-01 17:09:03,989 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:03,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1309554728, now seen corresponding path program 34 times [2022-03-01 17:09:03,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:03,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439513576] [2022-03-01 17:09:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:03,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:04,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:04,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439513576] [2022-03-01 17:09:04,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439513576] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:04,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499072017] [2022-03-01 17:09:04,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:09:04,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:04,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:04,121 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) [2022-03-01 17:09:04,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-01 17:09:04,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:09:04,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:04,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:04,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:04,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:04,454 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:09:04,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:09:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:04,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499072017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:04,505 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:04,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:09:04,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904472601] [2022-03-01 17:09:04,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:04,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:09:04,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:04,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:09:04,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:09:04,506 INFO L87 Difference]: Start difference. First operand 7078 states and 18125 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 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) [2022-03-01 17:09:05,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:05,251 INFO L93 Difference]: Finished difference Result 7674 states and 19268 transitions. [2022-03-01 17:09:05,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:09:05,252 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 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 41 [2022-03-01 17:09:05,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:05,261 INFO L225 Difference]: With dead ends: 7674 [2022-03-01 17:09:05,261 INFO L226 Difference]: Without dead ends: 7536 [2022-03-01 17:09:05,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:09:05,262 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 185 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:05,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 551 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1588 Invalid, 0 Unknown, 109 Unchecked, 0.6s Time] [2022-03-01 17:09:05,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7536 states. [2022-03-01 17:09:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7536 to 7046. [2022-03-01 17:09:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7046 states, 7045 states have (on average 2.555429382540809) internal successors, (18003), 7045 states have internal predecessors, (18003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:05,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7046 states to 7046 states and 18003 transitions. [2022-03-01 17:09:05,356 INFO L78 Accepts]: Start accepts. Automaton has 7046 states and 18003 transitions. Word has length 41 [2022-03-01 17:09:05,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:05,356 INFO L470 AbstractCegarLoop]: Abstraction has 7046 states and 18003 transitions. [2022-03-01 17:09:05,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 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) [2022-03-01 17:09:05,356 INFO L276 IsEmpty]: Start isEmpty. Operand 7046 states and 18003 transitions. [2022-03-01 17:09:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:05,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:05,363 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:05,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-01 17:09:05,563 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,SelfDestructingSolverStorable101 [2022-03-01 17:09:05,564 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:05,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:05,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1943773144, now seen corresponding path program 21 times [2022-03-01 17:09:05,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:05,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669625136] [2022-03-01 17:09:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:05,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:05,666 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:05,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:05,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669625136] [2022-03-01 17:09:05,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669625136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:05,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769284529] [2022-03-01 17:09:05,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:09:05,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:05,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:05,668 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) [2022-03-01 17:09:05,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-01 17:09:05,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-01 17:09:05,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:05,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:05,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:05,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:05,861 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:09:05,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:09:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:05,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769284529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:05,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:05,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-03-01 17:09:05,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654660731] [2022-03-01 17:09:05,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:05,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:09:05,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:05,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:09:05,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:09:05,931 INFO L87 Difference]: Start difference. First operand 7046 states and 18003 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:07,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:07,228 INFO L93 Difference]: Finished difference Result 15023 states and 35388 transitions. [2022-03-01 17:09:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 17:09:07,231 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:07,254 INFO L225 Difference]: With dead ends: 15023 [2022-03-01 17:09:07,254 INFO L226 Difference]: Without dead ends: 14664 [2022-03-01 17:09:07,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=483, Invalid=3423, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 17:09:07,255 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 308 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:07,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 877 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:09:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14664 states. [2022-03-01 17:09:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14664 to 7664. [2022-03-01 17:09:07,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7664 states, 7663 states have (on average 2.55056766279525) internal successors, (19545), 7663 states have internal predecessors, (19545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:07,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7664 states to 7664 states and 19545 transitions. [2022-03-01 17:09:07,406 INFO L78 Accepts]: Start accepts. Automaton has 7664 states and 19545 transitions. Word has length 41 [2022-03-01 17:09:07,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:07,406 INFO L470 AbstractCegarLoop]: Abstraction has 7664 states and 19545 transitions. [2022-03-01 17:09:07,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:07,406 INFO L276 IsEmpty]: Start isEmpty. Operand 7664 states and 19545 transitions. [2022-03-01 17:09:07,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:07,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:07,414 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:07,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-01 17:09:07,614 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,SelfDestructingSolverStorable102 [2022-03-01 17:09:07,615 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:07,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:07,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2128352424, now seen corresponding path program 35 times [2022-03-01 17:09:07,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:07,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952168108] [2022-03-01 17:09:07,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:07,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:07,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:07,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952168108] [2022-03-01 17:09:07,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952168108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:07,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018243608] [2022-03-01 17:09:07,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:09:07,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:07,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:07,699 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) [2022-03-01 17:09:07,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-01 17:09:07,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 17:09:07,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:07,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:07,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:07,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:07,909 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:09:07,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:09:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:07,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018243608] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:07,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:07,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2022-03-01 17:09:07,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967356565] [2022-03-01 17:09:07,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:07,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:09:07,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:07,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:09:07,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:09:07,983 INFO L87 Difference]: Start difference. First operand 7664 states and 19545 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:08,281 INFO L93 Difference]: Finished difference Result 9035 states and 22550 transitions. [2022-03-01 17:09:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:09:08,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:08,295 INFO L225 Difference]: With dead ends: 9035 [2022-03-01 17:09:08,295 INFO L226 Difference]: Without dead ends: 9012 [2022-03-01 17:09:08,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:09:08,296 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 85 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:08,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 269 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 599 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-03-01 17:09:08,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9012 states. [2022-03-01 17:09:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9012 to 8314. [2022-03-01 17:09:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8314 states, 8313 states have (on average 2.537591723806087) internal successors, (21095), 8313 states have internal predecessors, (21095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8314 states to 8314 states and 21095 transitions. [2022-03-01 17:09:08,433 INFO L78 Accepts]: Start accepts. Automaton has 8314 states and 21095 transitions. Word has length 41 [2022-03-01 17:09:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:08,434 INFO L470 AbstractCegarLoop]: Abstraction has 8314 states and 21095 transitions. [2022-03-01 17:09:08,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 8314 states and 21095 transitions. [2022-03-01 17:09:08,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:08,442 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:08,442 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:08,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-01 17:09:08,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-01 17:09:08,643 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:08,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1811602724, now seen corresponding path program 36 times [2022-03-01 17:09:08,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:08,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897823798] [2022-03-01 17:09:08,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:08,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:08,725 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:08,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897823798] [2022-03-01 17:09:08,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897823798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:08,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981225304] [2022-03-01 17:09:08,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:09:08,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:08,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:08,726 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) [2022-03-01 17:09:08,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-01 17:09:08,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 17:09:08,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:08,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:09:08,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:09,076 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-01 17:09:09,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2022-03-01 17:09:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:09,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:09,625 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:09,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 22 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:10,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981225304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:10,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:10,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 15] total 28 [2022-03-01 17:09:10,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96155410] [2022-03-01 17:09:10,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:10,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:09:10,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:10,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:09:10,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:09:10,091 INFO L87 Difference]: Start difference. First operand 8314 states and 21095 transitions. Second operand has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:11,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:11,915 INFO L93 Difference]: Finished difference Result 11904 states and 29601 transitions. [2022-03-01 17:09:11,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:09:11,915 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:11,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:11,933 INFO L225 Difference]: With dead ends: 11904 [2022-03-01 17:09:11,933 INFO L226 Difference]: Without dead ends: 11829 [2022-03-01 17:09:11,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=864, Invalid=3558, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 17:09:11,934 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 474 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:11,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 734 Invalid, 2553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2222 Invalid, 0 Unknown, 212 Unchecked, 0.8s Time] [2022-03-01 17:09:11,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11829 states. [2022-03-01 17:09:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11829 to 7376. [2022-03-01 17:09:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7376 states, 7375 states have (on average 2.5563389830508476) internal successors, (18853), 7375 states have internal predecessors, (18853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7376 states to 7376 states and 18853 transitions. [2022-03-01 17:09:12,099 INFO L78 Accepts]: Start accepts. Automaton has 7376 states and 18853 transitions. Word has length 41 [2022-03-01 17:09:12,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:12,099 INFO L470 AbstractCegarLoop]: Abstraction has 7376 states and 18853 transitions. [2022-03-01 17:09:12,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 7376 states and 18853 transitions. [2022-03-01 17:09:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:12,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:12,106 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:12,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-01 17:09:12,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:12,306 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:12,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:12,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1255677656, now seen corresponding path program 37 times [2022-03-01 17:09:12,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:12,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843027663] [2022-03-01 17:09:12,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:12,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:12,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:12,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843027663] [2022-03-01 17:09:12,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843027663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:12,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200599272] [2022-03-01 17:09:12,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:09:12,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:12,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:12,393 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) [2022-03-01 17:09:12,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-01 17:09:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:12,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:12,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:12,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:12,549 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:12,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:12,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200599272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:12,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:12,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-01 17:09:12,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981173458] [2022-03-01 17:09:12,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:12,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:09:12,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:09:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:09:12,634 INFO L87 Difference]: Start difference. First operand 7376 states and 18853 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:12,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:12,882 INFO L93 Difference]: Finished difference Result 8127 states and 20374 transitions. [2022-03-01 17:09:12,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:09:12,882 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:12,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:12,893 INFO L225 Difference]: With dead ends: 8127 [2022-03-01 17:09:12,893 INFO L226 Difference]: Without dead ends: 8127 [2022-03-01 17:09:12,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:09:12,894 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 77 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:12,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 206 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:12,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8127 states. [2022-03-01 17:09:12,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8127 to 7388. [2022-03-01 17:09:12,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7388 states, 7387 states have (on average 2.5571950724245296) internal successors, (18890), 7387 states have internal predecessors, (18890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7388 states to 7388 states and 18890 transitions. [2022-03-01 17:09:12,991 INFO L78 Accepts]: Start accepts. Automaton has 7388 states and 18890 transitions. Word has length 41 [2022-03-01 17:09:12,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:12,991 INFO L470 AbstractCegarLoop]: Abstraction has 7388 states and 18890 transitions. [2022-03-01 17:09:12,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:12,991 INFO L276 IsEmpty]: Start isEmpty. Operand 7388 states and 18890 transitions. [2022-03-01 17:09:12,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:12,998 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:12,998 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:13,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-01 17:09:13,211 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,SelfDestructingSolverStorable105 [2022-03-01 17:09:13,211 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:13,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:13,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1902091, now seen corresponding path program 22 times [2022-03-01 17:09:13,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:13,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849417509] [2022-03-01 17:09:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:13,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:13,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:13,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849417509] [2022-03-01 17:09:13,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849417509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:13,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039215191] [2022-03-01 17:09:13,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:09:13,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:13,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:13,320 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) [2022-03-01 17:09:13,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-01 17:09:13,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:09:13,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:13,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:09:13,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:13,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:13,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039215191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:13,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:13,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 16 [2022-03-01 17:09:13,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730958751] [2022-03-01 17:09:13,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:13,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:09:13,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:13,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:09:13,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:09:13,755 INFO L87 Difference]: Start difference. First operand 7388 states and 18890 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:14,054 INFO L93 Difference]: Finished difference Result 9906 states and 24188 transitions. [2022-03-01 17:09:14,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:09:14,055 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:14,069 INFO L225 Difference]: With dead ends: 9906 [2022-03-01 17:09:14,069 INFO L226 Difference]: Without dead ends: 9804 [2022-03-01 17:09:14,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:09:14,070 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 258 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:14,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 168 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9804 states. [2022-03-01 17:09:14,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9804 to 7737. [2022-03-01 17:09:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7737 states, 7736 states have (on average 2.5716132368148914) internal successors, (19894), 7736 states have internal predecessors, (19894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7737 states to 7737 states and 19894 transitions. [2022-03-01 17:09:14,223 INFO L78 Accepts]: Start accepts. Automaton has 7737 states and 19894 transitions. Word has length 41 [2022-03-01 17:09:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:14,223 INFO L470 AbstractCegarLoop]: Abstraction has 7737 states and 19894 transitions. [2022-03-01 17:09:14,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 7737 states and 19894 transitions. [2022-03-01 17:09:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:14,230 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:14,231 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:14,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-01 17:09:14,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:14,431 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:14,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash -173209317, now seen corresponding path program 23 times [2022-03-01 17:09:14,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:14,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279625913] [2022-03-01 17:09:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:14,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:14,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:14,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279625913] [2022-03-01 17:09:14,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279625913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:14,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229619798] [2022-03-01 17:09:14,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:09:14,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:14,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:14,509 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) [2022-03-01 17:09:14,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-01 17:09:14,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 17:09:14,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:14,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:09:14,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:14,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:14,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229619798] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:14,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:14,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 17 [2022-03-01 17:09:14,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312308395] [2022-03-01 17:09:14,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:14,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:09:14,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:14,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:09:14,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:09:14,869 INFO L87 Difference]: Start difference. First operand 7737 states and 19894 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:15,238 INFO L93 Difference]: Finished difference Result 9662 states and 23990 transitions. [2022-03-01 17:09:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:09:15,239 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:15,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:15,252 INFO L225 Difference]: With dead ends: 9662 [2022-03-01 17:09:15,252 INFO L226 Difference]: Without dead ends: 9662 [2022-03-01 17:09:15,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=269, Invalid=543, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:09:15,253 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 273 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:15,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 175 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9662 states. [2022-03-01 17:09:15,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9662 to 7850. [2022-03-01 17:09:15,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7850 states, 7849 states have (on average 2.578672442349344) internal successors, (20240), 7849 states have internal predecessors, (20240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7850 states to 7850 states and 20240 transitions. [2022-03-01 17:09:15,424 INFO L78 Accepts]: Start accepts. Automaton has 7850 states and 20240 transitions. Word has length 41 [2022-03-01 17:09:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:15,424 INFO L470 AbstractCegarLoop]: Abstraction has 7850 states and 20240 transitions. [2022-03-01 17:09:15,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:15,424 INFO L276 IsEmpty]: Start isEmpty. Operand 7850 states and 20240 transitions. [2022-03-01 17:09:15,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:15,431 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:15,431 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:15,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-01 17:09:15,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:15,633 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:15,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1766490874, now seen corresponding path program 24 times [2022-03-01 17:09:15,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:15,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203521926] [2022-03-01 17:09:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:15,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:15,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:15,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203521926] [2022-03-01 17:09:15,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203521926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:15,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299152008] [2022-03-01 17:09:15,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:09:15,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:15,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:15,708 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) [2022-03-01 17:09:15,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-01 17:09:15,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-01 17:09:15,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:15,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:15,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:15,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:15,851 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:15,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:15,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299152008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:15,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:15,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-01 17:09:15,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961335124] [2022-03-01 17:09:15,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:15,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:09:15,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:15,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:09:15,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:09:15,939 INFO L87 Difference]: Start difference. First operand 7850 states and 20240 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:16,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:16,179 INFO L93 Difference]: Finished difference Result 8793 states and 22208 transitions. [2022-03-01 17:09:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:09:16,179 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:16,191 INFO L225 Difference]: With dead ends: 8793 [2022-03-01 17:09:16,191 INFO L226 Difference]: Without dead ends: 8758 [2022-03-01 17:09:16,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:09:16,192 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 148 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:16,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 222 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8758 states. [2022-03-01 17:09:16,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8758 to 7925. [2022-03-01 17:09:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7925 states, 7924 states have (on average 2.57761231701161) internal successors, (20425), 7924 states have internal predecessors, (20425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7925 states to 7925 states and 20425 transitions. [2022-03-01 17:09:16,310 INFO L78 Accepts]: Start accepts. Automaton has 7925 states and 20425 transitions. Word has length 41 [2022-03-01 17:09:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:16,310 INFO L470 AbstractCegarLoop]: Abstraction has 7925 states and 20425 transitions. [2022-03-01 17:09:16,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 7925 states and 20425 transitions. [2022-03-01 17:09:16,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:16,318 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:16,318 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:16,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-01 17:09:16,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:16,518 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:16,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:16,519 INFO L85 PathProgramCache]: Analyzing trace with hash -266157882, now seen corresponding path program 38 times [2022-03-01 17:09:16,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:16,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932846212] [2022-03-01 17:09:16,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:16,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:16,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:16,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932846212] [2022-03-01 17:09:16,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932846212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:16,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520359100] [2022-03-01 17:09:16,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:09:16,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:16,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:16,596 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) [2022-03-01 17:09:16,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-01 17:09:16,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:09:16,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:16,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:16,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:16,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:16,749 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:16,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:16,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520359100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:16,831 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:16,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-03-01 17:09:16,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785091468] [2022-03-01 17:09:16,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:16,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:09:16,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:16,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:09:16,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:09:16,832 INFO L87 Difference]: Start difference. First operand 7925 states and 20425 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:17,153 INFO L93 Difference]: Finished difference Result 8298 states and 21151 transitions. [2022-03-01 17:09:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:09:17,153 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:17,165 INFO L225 Difference]: With dead ends: 8298 [2022-03-01 17:09:17,166 INFO L226 Difference]: Without dead ends: 8258 [2022-03-01 17:09:17,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:09:17,166 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 82 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:17,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 258 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:09:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8258 states. [2022-03-01 17:09:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8258 to 7919. [2022-03-01 17:09:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7919 states, 7918 states have (on average 2.575524122253094) internal successors, (20393), 7918 states have internal predecessors, (20393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7919 states to 7919 states and 20393 transitions. [2022-03-01 17:09:17,300 INFO L78 Accepts]: Start accepts. Automaton has 7919 states and 20393 transitions. Word has length 41 [2022-03-01 17:09:17,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:17,300 INFO L470 AbstractCegarLoop]: Abstraction has 7919 states and 20393 transitions. [2022-03-01 17:09:17,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:17,300 INFO L276 IsEmpty]: Start isEmpty. Operand 7919 states and 20393 transitions. [2022-03-01 17:09:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:17,308 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:17,308 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:17,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-01 17:09:17,508 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,SelfDestructingSolverStorable109 [2022-03-01 17:09:17,509 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:17,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:17,509 INFO L85 PathProgramCache]: Analyzing trace with hash -879694062, now seen corresponding path program 39 times [2022-03-01 17:09:17,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:17,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619418896] [2022-03-01 17:09:17,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:17,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:09:17,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:17,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619418896] [2022-03-01 17:09:17,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619418896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:17,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19328041] [2022-03-01 17:09:17,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:09:17,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:17,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:17,583 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) [2022-03-01 17:09:17,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-01 17:09:17,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-01 17:09:17,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:17,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:17,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:09:17,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:17,724 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:17,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:09:17,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19328041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:17,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:17,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-01 17:09:17,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716865749] [2022-03-01 17:09:17,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:17,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:09:17,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:09:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:09:17,809 INFO L87 Difference]: Start difference. First operand 7919 states and 20393 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:18,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:18,061 INFO L93 Difference]: Finished difference Result 8586 states and 21774 transitions. [2022-03-01 17:09:18,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:09:18,061 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:18,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:18,073 INFO L225 Difference]: With dead ends: 8586 [2022-03-01 17:09:18,073 INFO L226 Difference]: Without dead ends: 8559 [2022-03-01 17:09:18,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:09:18,073 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 100 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:18,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 224 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:18,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8559 states. [2022-03-01 17:09:18,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8559 to 7928. [2022-03-01 17:09:18,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7928 states, 7927 states have (on average 2.5749968462217736) internal successors, (20412), 7927 states have internal predecessors, (20412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7928 states to 7928 states and 20412 transitions. [2022-03-01 17:09:18,198 INFO L78 Accepts]: Start accepts. Automaton has 7928 states and 20412 transitions. Word has length 41 [2022-03-01 17:09:18,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:18,198 INFO L470 AbstractCegarLoop]: Abstraction has 7928 states and 20412 transitions. [2022-03-01 17:09:18,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:18,198 INFO L276 IsEmpty]: Start isEmpty. Operand 7928 states and 20412 transitions. [2022-03-01 17:09:18,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:18,206 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:18,206 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:18,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-01 17:09:18,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:18,406 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:18,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:18,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1262223272, now seen corresponding path program 40 times [2022-03-01 17:09:18,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:18,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089084947] [2022-03-01 17:09:18,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:18,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:18,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:18,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089084947] [2022-03-01 17:09:18,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089084947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:18,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026189545] [2022-03-01 17:09:18,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:09:18,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:18,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:18,486 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) [2022-03-01 17:09:18,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-01 17:09:18,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:09:18,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:18,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:18,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:18,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:18,641 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:09:18,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:09:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:18,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026189545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:18,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:18,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:09:18,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774706042] [2022-03-01 17:09:18,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:18,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:09:18,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:18,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:09:18,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:09:18,723 INFO L87 Difference]: Start difference. First operand 7928 states and 20412 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:19,023 INFO L93 Difference]: Finished difference Result 9392 states and 23635 transitions. [2022-03-01 17:09:19,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:09:19,024 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:19,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:19,036 INFO L225 Difference]: With dead ends: 9392 [2022-03-01 17:09:19,036 INFO L226 Difference]: Without dead ends: 9359 [2022-03-01 17:09:19,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 74 SyntacticMatches, 10 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:09:19,036 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 127 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:19,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 255 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:19,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9359 states. [2022-03-01 17:09:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9359 to 7864. [2022-03-01 17:09:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7864 states, 7863 states have (on average 2.580948747297469) internal successors, (20294), 7863 states have internal predecessors, (20294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:19,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7864 states to 7864 states and 20294 transitions. [2022-03-01 17:09:19,175 INFO L78 Accepts]: Start accepts. Automaton has 7864 states and 20294 transitions. Word has length 41 [2022-03-01 17:09:19,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:19,175 INFO L470 AbstractCegarLoop]: Abstraction has 7864 states and 20294 transitions. [2022-03-01 17:09:19,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:19,175 INFO L276 IsEmpty]: Start isEmpty. Operand 7864 states and 20294 transitions. [2022-03-01 17:09:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:19,183 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:19,183 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:19,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-01 17:09:19,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:19,384 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:19,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:19,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1686786410, now seen corresponding path program 25 times [2022-03-01 17:09:19,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:19,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998704868] [2022-03-01 17:09:19,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:19,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:19,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:19,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998704868] [2022-03-01 17:09:19,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998704868] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:19,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662632711] [2022-03-01 17:09:19,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:09:19,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:19,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:19,476 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) [2022-03-01 17:09:19,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-01 17:09:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:19,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:19,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:19,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:19,616 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:19,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:19,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662632711] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:19,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:19,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-01 17:09:19,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033252416] [2022-03-01 17:09:19,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:19,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:09:19,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:19,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:09:19,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:09:19,698 INFO L87 Difference]: Start difference. First operand 7864 states and 20294 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:19,945 INFO L93 Difference]: Finished difference Result 8926 states and 22473 transitions. [2022-03-01 17:09:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:09:19,945 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:19,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:19,957 INFO L225 Difference]: With dead ends: 8926 [2022-03-01 17:09:19,957 INFO L226 Difference]: Without dead ends: 8896 [2022-03-01 17:09:19,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:09:19,958 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 137 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:19,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 227 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:19,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2022-03-01 17:09:20,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 7864. [2022-03-01 17:09:20,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7864 states, 7863 states have (on average 2.5753529187333077) internal successors, (20250), 7863 states have internal predecessors, (20250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7864 states to 7864 states and 20250 transitions. [2022-03-01 17:09:20,081 INFO L78 Accepts]: Start accepts. Automaton has 7864 states and 20250 transitions. Word has length 41 [2022-03-01 17:09:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:20,081 INFO L470 AbstractCegarLoop]: Abstraction has 7864 states and 20250 transitions. [2022-03-01 17:09:20,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:20,082 INFO L276 IsEmpty]: Start isEmpty. Operand 7864 states and 20250 transitions. [2022-03-01 17:09:20,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:20,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:20,089 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:20,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-01 17:09:20,289 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,SelfDestructingSolverStorable112 [2022-03-01 17:09:20,290 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:20,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1107847894, now seen corresponding path program 41 times [2022-03-01 17:09:20,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:20,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405327321] [2022-03-01 17:09:20,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:20,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:20,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:20,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405327321] [2022-03-01 17:09:20,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405327321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:20,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941083004] [2022-03-01 17:09:20,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:09:20,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:20,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:20,363 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) [2022-03-01 17:09:20,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-01 17:09:20,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-01 17:09:20,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:20,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:20,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:20,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:20,518 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:20,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:20,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941083004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:20,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:20,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-03-01 17:09:20,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842057709] [2022-03-01 17:09:20,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:20,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:09:20,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:20,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:09:20,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:09:20,602 INFO L87 Difference]: Start difference. First operand 7864 states and 20250 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:20,953 INFO L93 Difference]: Finished difference Result 8284 states and 21051 transitions. [2022-03-01 17:09:20,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:09:20,954 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:20,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:20,964 INFO L225 Difference]: With dead ends: 8284 [2022-03-01 17:09:20,964 INFO L226 Difference]: Without dead ends: 8220 [2022-03-01 17:09:20,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:09:20,964 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 86 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:20,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 274 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:09:20,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8220 states. [2022-03-01 17:09:21,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8220 to 7819. [2022-03-01 17:09:21,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7819 states, 7818 states have (on average 2.5693271936556665) internal successors, (20087), 7818 states have internal predecessors, (20087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:21,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7819 states to 7819 states and 20087 transitions. [2022-03-01 17:09:21,063 INFO L78 Accepts]: Start accepts. Automaton has 7819 states and 20087 transitions. Word has length 41 [2022-03-01 17:09:21,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:21,063 INFO L470 AbstractCegarLoop]: Abstraction has 7819 states and 20087 transitions. [2022-03-01 17:09:21,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:21,063 INFO L276 IsEmpty]: Start isEmpty. Operand 7819 states and 20087 transitions. [2022-03-01 17:09:21,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:21,071 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:21,071 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:21,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-01 17:09:21,271 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,SelfDestructingSolverStorable113 [2022-03-01 17:09:21,271 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:21,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:21,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1721384074, now seen corresponding path program 42 times [2022-03-01 17:09:21,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:21,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033968781] [2022-03-01 17:09:21,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:21,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:09:21,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:21,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033968781] [2022-03-01 17:09:21,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033968781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:21,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153022640] [2022-03-01 17:09:21,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:09:21,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:21,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:21,349 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) [2022-03-01 17:09:21,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-01 17:09:21,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-01 17:09:21,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:21,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:21,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:09:21,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:21,508 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:21,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:09:21,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153022640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:21,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:21,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-01 17:09:21,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654131949] [2022-03-01 17:09:21,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:21,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:09:21,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:21,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:09:21,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:09:21,593 INFO L87 Difference]: Start difference. First operand 7819 states and 20087 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:21,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:21,864 INFO L93 Difference]: Finished difference Result 8708 states and 21927 transitions. [2022-03-01 17:09:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:09:21,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:21,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:21,876 INFO L225 Difference]: With dead ends: 8708 [2022-03-01 17:09:21,876 INFO L226 Difference]: Without dead ends: 8666 [2022-03-01 17:09:21,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:09:21,876 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 114 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:21,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 274 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:21,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8666 states. [2022-03-01 17:09:21,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8666 to 7755. [2022-03-01 17:09:21,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7755 states, 7754 states have (on average 2.567706989940676) internal successors, (19910), 7754 states have internal predecessors, (19910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:21,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7755 states to 7755 states and 19910 transitions. [2022-03-01 17:09:21,986 INFO L78 Accepts]: Start accepts. Automaton has 7755 states and 19910 transitions. Word has length 41 [2022-03-01 17:09:21,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:21,986 INFO L470 AbstractCegarLoop]: Abstraction has 7755 states and 19910 transitions. [2022-03-01 17:09:21,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:21,986 INFO L276 IsEmpty]: Start isEmpty. Operand 7755 states and 19910 transitions. [2022-03-01 17:09:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:21,993 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:21,993 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:22,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-01 17:09:22,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-01 17:09:22,193 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:22,194 INFO L85 PathProgramCache]: Analyzing trace with hash 420533260, now seen corresponding path program 43 times [2022-03-01 17:09:22,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:22,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208327736] [2022-03-01 17:09:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:22,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:22,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:22,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208327736] [2022-03-01 17:09:22,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208327736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:22,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707636436] [2022-03-01 17:09:22,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:09:22,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:22,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:22,279 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) [2022-03-01 17:09:22,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-01 17:09:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:22,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:22,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:22,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:22,433 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:09:22,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:09:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:22,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707636436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:22,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:22,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:09:22,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776925962] [2022-03-01 17:09:22,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:22,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:09:22,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:22,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:09:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:09:22,519 INFO L87 Difference]: Start difference. First operand 7755 states and 19910 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:22,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:22,886 INFO L93 Difference]: Finished difference Result 9363 states and 23419 transitions. [2022-03-01 17:09:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:09:22,886 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:22,899 INFO L225 Difference]: With dead ends: 9363 [2022-03-01 17:09:22,899 INFO L226 Difference]: Without dead ends: 9321 [2022-03-01 17:09:22,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 10 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:09:22,899 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 201 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:22,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 305 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:09:22,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9321 states. [2022-03-01 17:09:23,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9321 to 7538. [2022-03-01 17:09:23,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7538 states, 7537 states have (on average 2.5832559373756134) internal successors, (19470), 7537 states have internal predecessors, (19470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:23,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7538 states to 7538 states and 19470 transitions. [2022-03-01 17:09:23,040 INFO L78 Accepts]: Start accepts. Automaton has 7538 states and 19470 transitions. Word has length 41 [2022-03-01 17:09:23,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:23,040 INFO L470 AbstractCegarLoop]: Abstraction has 7538 states and 19470 transitions. [2022-03-01 17:09:23,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 7538 states and 19470 transitions. [2022-03-01 17:09:23,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:23,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:23,047 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:23,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-01 17:09:23,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:23,248 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:23,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:23,248 INFO L85 PathProgramCache]: Analyzing trace with hash 575369794, now seen corresponding path program 44 times [2022-03-01 17:09:23,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:23,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383410399] [2022-03-01 17:09:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:23,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:23,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:23,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383410399] [2022-03-01 17:09:23,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383410399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:23,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113202084] [2022-03-01 17:09:23,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:09:23,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:23,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:23,327 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) [2022-03-01 17:09:23,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-01 17:09:23,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:09:23,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:23,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:23,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:23,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:23,481 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:09:23,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:09:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:23,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113202084] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:23,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:23,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-01 17:09:23,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295943226] [2022-03-01 17:09:23,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:23,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:09:23,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:23,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:09:23,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:09:23,553 INFO L87 Difference]: Start difference. First operand 7538 states and 19470 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:23,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:23,897 INFO L93 Difference]: Finished difference Result 9064 states and 22789 transitions. [2022-03-01 17:09:23,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:09:23,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:23,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:23,909 INFO L225 Difference]: With dead ends: 9064 [2022-03-01 17:09:23,909 INFO L226 Difference]: Without dead ends: 9010 [2022-03-01 17:09:23,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:09:23,909 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 173 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:23,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 292 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:09:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9010 states. [2022-03-01 17:09:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9010 to 7498. [2022-03-01 17:09:24,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7498 states, 7497 states have (on average 2.5800987061491263) internal successors, (19343), 7497 states have internal predecessors, (19343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7498 states to 7498 states and 19343 transitions. [2022-03-01 17:09:24,014 INFO L78 Accepts]: Start accepts. Automaton has 7498 states and 19343 transitions. Word has length 41 [2022-03-01 17:09:24,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:24,014 INFO L470 AbstractCegarLoop]: Abstraction has 7498 states and 19343 transitions. [2022-03-01 17:09:24,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:24,015 INFO L276 IsEmpty]: Start isEmpty. Operand 7498 states and 19343 transitions. [2022-03-01 17:09:24,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:24,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:24,021 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:24,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-01 17:09:24,221 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,SelfDestructingSolverStorable116 [2022-03-01 17:09:24,221 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:24,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:24,222 INFO L85 PathProgramCache]: Analyzing trace with hash 918712966, now seen corresponding path program 26 times [2022-03-01 17:09:24,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:24,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938904871] [2022-03-01 17:09:24,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:24,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:24,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:24,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938904871] [2022-03-01 17:09:24,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938904871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:24,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667981030] [2022-03-01 17:09:24,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:09:24,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:24,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:24,312 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) [2022-03-01 17:09:24,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-01 17:09:24,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:09:24,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:24,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:24,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:24,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:24,500 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:24,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:24,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667981030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:24,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:24,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-01 17:09:24,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853942610] [2022-03-01 17:09:24,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:24,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:09:24,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:24,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:09:24,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:09:24,590 INFO L87 Difference]: Start difference. First operand 7498 states and 19343 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:24,854 INFO L93 Difference]: Finished difference Result 8461 states and 21367 transitions. [2022-03-01 17:09:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:09:24,854 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:24,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:24,866 INFO L225 Difference]: With dead ends: 8461 [2022-03-01 17:09:24,866 INFO L226 Difference]: Without dead ends: 8443 [2022-03-01 17:09:24,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:09:24,867 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 115 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:24,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 232 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:24,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8443 states. [2022-03-01 17:09:24,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8443 to 7584. [2022-03-01 17:09:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7584 states, 7583 states have (on average 2.57734405907952) internal successors, (19544), 7583 states have internal predecessors, (19544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:24,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7584 states to 7584 states and 19544 transitions. [2022-03-01 17:09:24,996 INFO L78 Accepts]: Start accepts. Automaton has 7584 states and 19544 transitions. Word has length 41 [2022-03-01 17:09:24,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:24,996 INFO L470 AbstractCegarLoop]: Abstraction has 7584 states and 19544 transitions. [2022-03-01 17:09:24,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:24,997 INFO L276 IsEmpty]: Start isEmpty. Operand 7584 states and 19544 transitions. [2022-03-01 17:09:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:25,004 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:25,004 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:25,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-01 17:09:25,204 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,SelfDestructingSolverStorable117 [2022-03-01 17:09:25,205 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:25,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:25,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1875921338, now seen corresponding path program 45 times [2022-03-01 17:09:25,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:25,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467584218] [2022-03-01 17:09:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:25,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:25,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:25,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467584218] [2022-03-01 17:09:25,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467584218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:25,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833589957] [2022-03-01 17:09:25,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:09:25,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:25,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:25,288 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) [2022-03-01 17:09:25,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-01 17:09:25,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-01 17:09:25,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:25,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:25,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:25,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:25,437 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:25,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:25,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833589957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:25,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:25,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-03-01 17:09:25,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577139682] [2022-03-01 17:09:25,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:25,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:09:25,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:25,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:09:25,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:09:25,519 INFO L87 Difference]: Start difference. First operand 7584 states and 19544 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:25,853 INFO L93 Difference]: Finished difference Result 8061 states and 20446 transitions. [2022-03-01 17:09:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:09:25,854 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:25,865 INFO L225 Difference]: With dead ends: 8061 [2022-03-01 17:09:25,865 INFO L226 Difference]: Without dead ends: 7979 [2022-03-01 17:09:25,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:09:25,865 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 88 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:25,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 287 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:09:25,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2022-03-01 17:09:25,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 7509. [2022-03-01 17:09:25,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7509 states, 7508 states have (on average 2.5712573255194457) internal successors, (19305), 7508 states have internal predecessors, (19305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7509 states to 7509 states and 19305 transitions. [2022-03-01 17:09:25,973 INFO L78 Accepts]: Start accepts. Automaton has 7509 states and 19305 transitions. Word has length 41 [2022-03-01 17:09:25,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:25,973 INFO L470 AbstractCegarLoop]: Abstraction has 7509 states and 19305 transitions. [2022-03-01 17:09:25,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:25,973 INFO L276 IsEmpty]: Start isEmpty. Operand 7509 states and 19305 transitions. [2022-03-01 17:09:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:25,980 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:25,980 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:25,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-01 17:09:26,180 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,SelfDestructingSolverStorable118 [2022-03-01 17:09:26,181 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:26,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:26,181 INFO L85 PathProgramCache]: Analyzing trace with hash 880111234, now seen corresponding path program 27 times [2022-03-01 17:09:26,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:26,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433590000] [2022-03-01 17:09:26,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:26,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:26,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:26,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433590000] [2022-03-01 17:09:26,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433590000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:26,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029971749] [2022-03-01 17:09:26,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:09:26,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:26,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:26,294 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) [2022-03-01 17:09:26,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-01 17:09:26,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-01 17:09:26,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:26,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:26,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:26,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:26,456 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:09:26,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:09:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:26,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029971749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:26,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:26,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-03-01 17:09:26,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824170809] [2022-03-01 17:09:26,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:26,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:09:26,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:26,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:09:26,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:09:26,511 INFO L87 Difference]: Start difference. First operand 7509 states and 19305 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:26,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:26,844 INFO L93 Difference]: Finished difference Result 9398 states and 23397 transitions. [2022-03-01 17:09:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:09:26,845 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:26,856 INFO L225 Difference]: With dead ends: 9398 [2022-03-01 17:09:26,857 INFO L226 Difference]: Without dead ends: 9332 [2022-03-01 17:09:26,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 72 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:09:26,857 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 131 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:26,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 205 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:26,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9332 states. [2022-03-01 17:09:26,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9332 to 7487. [2022-03-01 17:09:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7487 states, 7486 states have (on average 2.569329414907828) internal successors, (19234), 7486 states have internal predecessors, (19234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7487 states to 7487 states and 19234 transitions. [2022-03-01 17:09:26,995 INFO L78 Accepts]: Start accepts. Automaton has 7487 states and 19234 transitions. Word has length 41 [2022-03-01 17:09:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:26,995 INFO L470 AbstractCegarLoop]: Abstraction has 7487 states and 19234 transitions. [2022-03-01 17:09:26,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 7487 states and 19234 transitions. [2022-03-01 17:09:27,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:27,001 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:27,001 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:27,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-01 17:09:27,201 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,SelfDestructingSolverStorable119 [2022-03-01 17:09:27,202 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:27,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:27,202 INFO L85 PathProgramCache]: Analyzing trace with hash 718059138, now seen corresponding path program 46 times [2022-03-01 17:09:27,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:27,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967492298] [2022-03-01 17:09:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:27,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:27,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:27,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967492298] [2022-03-01 17:09:27,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967492298] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:27,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274745480] [2022-03-01 17:09:27,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:09:27,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:27,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:27,301 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) [2022-03-01 17:09:27,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-01 17:09:27,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:09:27,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:27,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:27,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:27,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:27,587 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:09:27,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:09:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:27,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274745480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:27,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:27,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-01 17:09:27,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692001647] [2022-03-01 17:09:27,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:27,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:09:27,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:27,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:09:27,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:09:27,641 INFO L87 Difference]: Start difference. First operand 7487 states and 19234 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 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) [2022-03-01 17:09:27,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:27,881 INFO L93 Difference]: Finished difference Result 7610 states and 19452 transitions. [2022-03-01 17:09:27,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:09:27,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 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 41 [2022-03-01 17:09:27,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:27,891 INFO L225 Difference]: With dead ends: 7610 [2022-03-01 17:09:27,891 INFO L226 Difference]: Without dead ends: 7557 [2022-03-01 17:09:27,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 10 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:09:27,891 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:27,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 148 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 625 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-03-01 17:09:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7557 states. [2022-03-01 17:09:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7557 to 7478. [2022-03-01 17:09:27,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7478 states, 7477 states have (on average 2.5672060987026883) internal successors, (19195), 7477 states have internal predecessors, (19195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:27,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7478 states to 7478 states and 19195 transitions. [2022-03-01 17:09:27,988 INFO L78 Accepts]: Start accepts. Automaton has 7478 states and 19195 transitions. Word has length 41 [2022-03-01 17:09:27,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:27,989 INFO L470 AbstractCegarLoop]: Abstraction has 7478 states and 19195 transitions. [2022-03-01 17:09:27,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 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) [2022-03-01 17:09:27,989 INFO L276 IsEmpty]: Start isEmpty. Operand 7478 states and 19195 transitions. [2022-03-01 17:09:27,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:27,995 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:27,995 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:28,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-01 17:09:28,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:28,197 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:28,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:28,198 INFO L85 PathProgramCache]: Analyzing trace with hash 856335594, now seen corresponding path program 28 times [2022-03-01 17:09:28,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:28,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644826748] [2022-03-01 17:09:28,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:28,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:28,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:28,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644826748] [2022-03-01 17:09:28,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644826748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:28,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649638885] [2022-03-01 17:09:28,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:09:28,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:28,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:28,277 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) [2022-03-01 17:09:28,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-01 17:09:28,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:09:28,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:28,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:28,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:28,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:28,430 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:09:28,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:09:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:28,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649638885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:28,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:28,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-01 17:09:28,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690243928] [2022-03-01 17:09:28,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:28,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:09:28,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:28,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:09:28,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:09:28,495 INFO L87 Difference]: Start difference. First operand 7478 states and 19195 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:28,812 INFO L93 Difference]: Finished difference Result 8785 states and 22005 transitions. [2022-03-01 17:09:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:09:28,812 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:28,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:28,823 INFO L225 Difference]: With dead ends: 8785 [2022-03-01 17:09:28,823 INFO L226 Difference]: Without dead ends: 8765 [2022-03-01 17:09:28,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:09:28,824 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 99 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:28,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 237 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:28,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8765 states. [2022-03-01 17:09:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8765 to 7219. [2022-03-01 17:09:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7219 states, 7218 states have (on average 2.5854807425879747) internal successors, (18662), 7218 states have internal predecessors, (18662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7219 states to 7219 states and 18662 transitions. [2022-03-01 17:09:28,922 INFO L78 Accepts]: Start accepts. Automaton has 7219 states and 18662 transitions. Word has length 41 [2022-03-01 17:09:28,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:28,922 INFO L470 AbstractCegarLoop]: Abstraction has 7219 states and 18662 transitions. [2022-03-01 17:09:28,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 7219 states and 18662 transitions. [2022-03-01 17:09:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:28,928 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:28,928 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:28,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-01 17:09:29,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:29,128 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:29,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:29,129 INFO L85 PathProgramCache]: Analyzing trace with hash 679444650, now seen corresponding path program 47 times [2022-03-01 17:09:29,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:29,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158292119] [2022-03-01 17:09:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:29,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:29,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:29,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158292119] [2022-03-01 17:09:29,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158292119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:29,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339067401] [2022-03-01 17:09:29,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:09:29,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:29,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:29,239 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) [2022-03-01 17:09:29,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-01 17:09:29,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 17:09:29,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:29,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:29,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:29,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:29,489 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:09:29,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:09:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:29,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339067401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:29,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:29,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:09:29,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668855325] [2022-03-01 17:09:29,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:29,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:09:29,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:29,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:09:29,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:09:29,553 INFO L87 Difference]: Start difference. First operand 7219 states and 18662 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 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) [2022-03-01 17:09:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:29,761 INFO L93 Difference]: Finished difference Result 7314 states and 18822 transitions. [2022-03-01 17:09:29,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:09:29,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 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 41 [2022-03-01 17:09:29,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:29,771 INFO L225 Difference]: With dead ends: 7314 [2022-03-01 17:09:29,771 INFO L226 Difference]: Without dead ends: 7276 [2022-03-01 17:09:29,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 10 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:09:29,772 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:29,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 115 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2022-03-01 17:09:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 7197. [2022-03-01 17:09:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7197 states, 7196 states have (on average 2.5849082823790996) internal successors, (18601), 7196 states have internal predecessors, (18601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:29,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7197 states to 7197 states and 18601 transitions. [2022-03-01 17:09:29,867 INFO L78 Accepts]: Start accepts. Automaton has 7197 states and 18601 transitions. Word has length 41 [2022-03-01 17:09:29,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:29,868 INFO L470 AbstractCegarLoop]: Abstraction has 7197 states and 18601 transitions. [2022-03-01 17:09:29,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 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) [2022-03-01 17:09:29,868 INFO L276 IsEmpty]: Start isEmpty. Operand 7197 states and 18601 transitions. [2022-03-01 17:09:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:29,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:29,874 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:29,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-01 17:09:30,075 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,SelfDestructingSolverStorable122 [2022-03-01 17:09:30,076 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:30,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:30,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1646311550, now seen corresponding path program 29 times [2022-03-01 17:09:30,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:30,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715233732] [2022-03-01 17:09:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:30,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:30,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:30,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715233732] [2022-03-01 17:09:30,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715233732] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:30,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105501253] [2022-03-01 17:09:30,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:09:30,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:30,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:30,150 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) [2022-03-01 17:09:30,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-01 17:09:30,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 17:09:30,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:30,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:30,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:30,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:30,304 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:09:30,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:09:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:30,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105501253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:30,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:30,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:09:30,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980637599] [2022-03-01 17:09:30,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:30,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:09:30,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:30,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:09:30,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:09:30,378 INFO L87 Difference]: Start difference. First operand 7197 states and 18601 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:30,665 INFO L93 Difference]: Finished difference Result 8076 states and 20471 transitions. [2022-03-01 17:09:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:09:30,665 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:30,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:30,677 INFO L225 Difference]: With dead ends: 8076 [2022-03-01 17:09:30,677 INFO L226 Difference]: Without dead ends: 8076 [2022-03-01 17:09:30,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 74 SyntacticMatches, 10 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:09:30,677 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 88 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:30,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 221 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:30,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2022-03-01 17:09:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 7201. [2022-03-01 17:09:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7201 states, 7200 states have (on average 2.5844444444444443) internal successors, (18608), 7200 states have internal predecessors, (18608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7201 states to 7201 states and 18608 transitions. [2022-03-01 17:09:30,778 INFO L78 Accepts]: Start accepts. Automaton has 7201 states and 18608 transitions. Word has length 41 [2022-03-01 17:09:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:30,778 INFO L470 AbstractCegarLoop]: Abstraction has 7201 states and 18608 transitions. [2022-03-01 17:09:30,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 7201 states and 18608 transitions. [2022-03-01 17:09:30,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:30,785 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:30,785 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:30,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-01 17:09:30,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-01 17:09:30,985 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:30,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:30,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1015359362, now seen corresponding path program 48 times [2022-03-01 17:09:30,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:30,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406106095] [2022-03-01 17:09:30,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:30,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:31,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:31,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406106095] [2022-03-01 17:09:31,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406106095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:31,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032664266] [2022-03-01 17:09:31,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:09:31,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:31,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:31,067 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) [2022-03-01 17:09:31,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-01 17:09:31,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 17:09:31,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:31,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:09:31,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:31,340 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-01 17:09:31,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2022-03-01 17:09:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:31,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:31,921 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:31,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:32,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032664266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:32,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:32,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 12] total 22 [2022-03-01 17:09:32,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738555349] [2022-03-01 17:09:32,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:32,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:09:32,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:32,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:09:32,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:09:32,102 INFO L87 Difference]: Start difference. First operand 7201 states and 18608 transitions. Second operand has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 22 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:33,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:33,423 INFO L93 Difference]: Finished difference Result 10756 states and 27009 transitions. [2022-03-01 17:09:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:09:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 22 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:33,440 INFO L225 Difference]: With dead ends: 10756 [2022-03-01 17:09:33,440 INFO L226 Difference]: Without dead ends: 10731 [2022-03-01 17:09:33,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=491, Invalid=1959, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:09:33,440 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 300 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:33,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 508 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1444 Invalid, 0 Unknown, 178 Unchecked, 0.5s Time] [2022-03-01 17:09:33,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10731 states. [2022-03-01 17:09:33,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10731 to 7098. [2022-03-01 17:09:33,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7098 states, 7097 states have (on average 2.5908130195857404) internal successors, (18387), 7097 states have internal predecessors, (18387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:33,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7098 states to 7098 states and 18387 transitions. [2022-03-01 17:09:33,569 INFO L78 Accepts]: Start accepts. Automaton has 7098 states and 18387 transitions. Word has length 41 [2022-03-01 17:09:33,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:33,569 INFO L470 AbstractCegarLoop]: Abstraction has 7098 states and 18387 transitions. [2022-03-01 17:09:33,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.869565217391304) internal successors, (89), 22 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:33,569 INFO L276 IsEmpty]: Start isEmpty. Operand 7098 states and 18387 transitions. [2022-03-01 17:09:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:33,575 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:33,575 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:33,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-01 17:09:33,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-01 17:09:33,776 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:33,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:33,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1926296578, now seen corresponding path program 49 times [2022-03-01 17:09:33,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:33,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922759857] [2022-03-01 17:09:33,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:33,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:09:33,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:33,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922759857] [2022-03-01 17:09:33,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922759857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:33,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630992336] [2022-03-01 17:09:33,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:09:33,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:33,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:33,858 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) [2022-03-01 17:09:33,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-01 17:09:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:33,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:33,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:09:33,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:33,997 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:33,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:09:34,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630992336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:34,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:34,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-01 17:09:34,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933044509] [2022-03-01 17:09:34,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:34,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:09:34,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:34,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:09:34,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:09:34,081 INFO L87 Difference]: Start difference. First operand 7098 states and 18387 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:34,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:34,298 INFO L93 Difference]: Finished difference Result 7714 states and 19693 transitions. [2022-03-01 17:09:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:09:34,298 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:34,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:34,308 INFO L225 Difference]: With dead ends: 7714 [2022-03-01 17:09:34,309 INFO L226 Difference]: Without dead ends: 7702 [2022-03-01 17:09:34,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:09:34,309 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 101 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:34,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 162 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7702 states. [2022-03-01 17:09:34,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7702 to 7140. [2022-03-01 17:09:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 7139 states have (on average 2.5892982210393614) internal successors, (18485), 7139 states have internal predecessors, (18485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 18485 transitions. [2022-03-01 17:09:34,427 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 18485 transitions. Word has length 41 [2022-03-01 17:09:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:34,427 INFO L470 AbstractCegarLoop]: Abstraction has 7140 states and 18485 transitions. [2022-03-01 17:09:34,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:34,427 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 18485 transitions. [2022-03-01 17:09:34,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:34,433 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:34,433 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:34,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-01 17:09:34,633 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,SelfDestructingSolverStorable125 [2022-03-01 17:09:34,633 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:34,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:34,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1726020235, now seen corresponding path program 30 times [2022-03-01 17:09:34,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:34,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887631444] [2022-03-01 17:09:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:34,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:34,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:34,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887631444] [2022-03-01 17:09:34,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887631444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:34,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115965117] [2022-03-01 17:09:34,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:09:34,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:34,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:34,709 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) [2022-03-01 17:09:34,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-01 17:09:34,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 17:09:34,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:34,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:09:34,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:34,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:34,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115965117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:34,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:34,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 17 [2022-03-01 17:09:34,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024346113] [2022-03-01 17:09:34,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:34,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:09:34,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:34,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:09:34,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:09:34,997 INFO L87 Difference]: Start difference. First operand 7140 states and 18485 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 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) [2022-03-01 17:09:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:35,257 INFO L93 Difference]: Finished difference Result 8165 states and 20548 transitions. [2022-03-01 17:09:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:09:35,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 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 41 [2022-03-01 17:09:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:35,268 INFO L225 Difference]: With dead ends: 8165 [2022-03-01 17:09:35,268 INFO L226 Difference]: Without dead ends: 8123 [2022-03-01 17:09:35,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:09:35,268 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 212 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:35,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 184 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8123 states. [2022-03-01 17:09:35,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8123 to 5818. [2022-03-01 17:09:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5818 states, 5817 states have (on average 2.5404847859721507) internal successors, (14778), 5817 states have internal predecessors, (14778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:35,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5818 states to 5818 states and 14778 transitions. [2022-03-01 17:09:35,350 INFO L78 Accepts]: Start accepts. Automaton has 5818 states and 14778 transitions. Word has length 41 [2022-03-01 17:09:35,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:35,351 INFO L470 AbstractCegarLoop]: Abstraction has 5818 states and 14778 transitions. [2022-03-01 17:09:35,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 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) [2022-03-01 17:09:35,351 INFO L276 IsEmpty]: Start isEmpty. Operand 5818 states and 14778 transitions. [2022-03-01 17:09:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:35,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:35,356 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:35,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-01 17:09:35,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-03-01 17:09:35,557 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:35,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:35,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1466471446, now seen corresponding path program 31 times [2022-03-01 17:09:35,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:35,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478265510] [2022-03-01 17:09:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:35,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:35,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:35,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478265510] [2022-03-01 17:09:35,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478265510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:35,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742423943] [2022-03-01 17:09:35,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:09:35,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:35,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:35,631 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) [2022-03-01 17:09:35,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-01 17:09:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:35,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:35,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:35,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:35,787 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:35,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:35,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742423943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:35,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:35,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-01 17:09:35,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867283731] [2022-03-01 17:09:35,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:35,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:09:35,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:35,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:09:35,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:09:35,892 INFO L87 Difference]: Start difference. First operand 5818 states and 14778 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:36,190 INFO L93 Difference]: Finished difference Result 7063 states and 17450 transitions. [2022-03-01 17:09:36,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:09:36,196 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:36,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:36,210 INFO L225 Difference]: With dead ends: 7063 [2022-03-01 17:09:36,211 INFO L226 Difference]: Without dead ends: 7020 [2022-03-01 17:09:36,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:09:36,213 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 99 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:36,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 244 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:36,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7020 states. [2022-03-01 17:09:36,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7020 to 6154. [2022-03-01 17:09:36,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6154 states, 6153 states have (on average 2.532098163497481) internal successors, (15580), 6153 states have internal predecessors, (15580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6154 states to 6154 states and 15580 transitions. [2022-03-01 17:09:36,339 INFO L78 Accepts]: Start accepts. Automaton has 6154 states and 15580 transitions. Word has length 41 [2022-03-01 17:09:36,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:36,340 INFO L470 AbstractCegarLoop]: Abstraction has 6154 states and 15580 transitions. [2022-03-01 17:09:36,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:36,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6154 states and 15580 transitions. [2022-03-01 17:09:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:36,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:36,345 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:36,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-01 17:09:36,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-03-01 17:09:36,547 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:36,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:36,547 INFO L85 PathProgramCache]: Analyzing trace with hash 33861546, now seen corresponding path program 50 times [2022-03-01 17:09:36,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:36,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441675805] [2022-03-01 17:09:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:36,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:36,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:36,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441675805] [2022-03-01 17:09:36,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441675805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:36,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417700484] [2022-03-01 17:09:36,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:09:36,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:36,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:36,621 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) [2022-03-01 17:09:36,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-01 17:09:36,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:09:36,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:36,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:09:36,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:36,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-03-01 17:09:36,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:09:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:36,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:36,827 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:36,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:36,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417700484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:36,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:36,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 14 [2022-03-01 17:09:36,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610303463] [2022-03-01 17:09:36,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:36,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:09:36,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:36,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:09:36,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:09:36,994 INFO L87 Difference]: Start difference. First operand 6154 states and 15580 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 14 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) [2022-03-01 17:09:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:37,417 INFO L93 Difference]: Finished difference Result 7761 states and 18910 transitions. [2022-03-01 17:09:37,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:09:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 14 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 41 [2022-03-01 17:09:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:37,427 INFO L225 Difference]: With dead ends: 7761 [2022-03-01 17:09:37,427 INFO L226 Difference]: Without dead ends: 7497 [2022-03-01 17:09:37,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:09:37,428 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 174 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:37,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 351 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:09:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7497 states. [2022-03-01 17:09:37,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7497 to 5997. [2022-03-01 17:09:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5997 states, 5996 states have (on average 2.5320213475650433) internal successors, (15182), 5996 states have internal predecessors, (15182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5997 states to 5997 states and 15182 transitions. [2022-03-01 17:09:37,504 INFO L78 Accepts]: Start accepts. Automaton has 5997 states and 15182 transitions. Word has length 41 [2022-03-01 17:09:37,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:37,504 INFO L470 AbstractCegarLoop]: Abstraction has 5997 states and 15182 transitions. [2022-03-01 17:09:37,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 14 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) [2022-03-01 17:09:37,504 INFO L276 IsEmpty]: Start isEmpty. Operand 5997 states and 15182 transitions. [2022-03-01 17:09:37,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:37,509 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:37,509 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:37,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-01 17:09:37,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:37,709 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:37,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2066935159, now seen corresponding path program 51 times [2022-03-01 17:09:37,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:37,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211779581] [2022-03-01 17:09:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:37,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:37,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:37,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211779581] [2022-03-01 17:09:37,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211779581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:37,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972528955] [2022-03-01 17:09:37,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:09:37,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:37,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:37,784 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) [2022-03-01 17:09:37,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-01 17:09:37,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-01 17:09:37,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:37,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:09:37,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:37,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:38,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972528955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:38,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:38,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-03-01 17:09:38,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075158608] [2022-03-01 17:09:38,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:38,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:09:38,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:38,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:09:38,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:09:38,118 INFO L87 Difference]: Start difference. First operand 5997 states and 15182 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:38,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:38,286 INFO L93 Difference]: Finished difference Result 7969 states and 19393 transitions. [2022-03-01 17:09:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:09:38,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:38,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:38,296 INFO L225 Difference]: With dead ends: 7969 [2022-03-01 17:09:38,296 INFO L226 Difference]: Without dead ends: 7939 [2022-03-01 17:09:38,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:09:38,296 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 150 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:38,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 103 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:09:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7939 states. [2022-03-01 17:09:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7939 to 6276. [2022-03-01 17:09:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6276 states, 6275 states have (on average 2.5472509960159364) internal successors, (15984), 6275 states have internal predecessors, (15984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6276 states to 6276 states and 15984 transitions. [2022-03-01 17:09:38,380 INFO L78 Accepts]: Start accepts. Automaton has 6276 states and 15984 transitions. Word has length 41 [2022-03-01 17:09:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:38,381 INFO L470 AbstractCegarLoop]: Abstraction has 6276 states and 15984 transitions. [2022-03-01 17:09:38,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:38,381 INFO L276 IsEmpty]: Start isEmpty. Operand 6276 states and 15984 transitions. [2022-03-01 17:09:38,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:38,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:38,386 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:38,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-01 17:09:38,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:38,586 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:38,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:38,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2103681911, now seen corresponding path program 52 times [2022-03-01 17:09:38,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:38,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653879529] [2022-03-01 17:09:38,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:38,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:38,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:38,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653879529] [2022-03-01 17:09:38,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653879529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:38,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496524352] [2022-03-01 17:09:38,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:09:38,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:38,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:38,666 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) [2022-03-01 17:09:38,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-01 17:09:38,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:09:38,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:38,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:09:38,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:38,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:39,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496524352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:39,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:39,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2022-03-01 17:09:39,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242984436] [2022-03-01 17:09:39,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:39,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:09:39,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:39,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:09:39,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:09:39,002 INFO L87 Difference]: Start difference. First operand 6276 states and 15984 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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) [2022-03-01 17:09:39,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:39,195 INFO L93 Difference]: Finished difference Result 8194 states and 19785 transitions. [2022-03-01 17:09:39,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:09:39,195 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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 41 [2022-03-01 17:09:39,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:39,206 INFO L225 Difference]: With dead ends: 8194 [2022-03-01 17:09:39,206 INFO L226 Difference]: Without dead ends: 8134 [2022-03-01 17:09:39,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:09:39,206 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 199 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:39,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 113 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:09:39,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8134 states. [2022-03-01 17:09:39,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8134 to 6276. [2022-03-01 17:09:39,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6276 states, 6275 states have (on average 2.545019920318725) internal successors, (15970), 6275 states have internal predecessors, (15970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6276 states to 6276 states and 15970 transitions. [2022-03-01 17:09:39,312 INFO L78 Accepts]: Start accepts. Automaton has 6276 states and 15970 transitions. Word has length 41 [2022-03-01 17:09:39,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:39,312 INFO L470 AbstractCegarLoop]: Abstraction has 6276 states and 15970 transitions. [2022-03-01 17:09:39,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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) [2022-03-01 17:09:39,312 INFO L276 IsEmpty]: Start isEmpty. Operand 6276 states and 15970 transitions. [2022-03-01 17:09:39,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:39,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:39,317 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:39,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-01 17:09:39,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:39,518 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:39,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:39,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1504073858, now seen corresponding path program 53 times [2022-03-01 17:09:39,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:39,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401471657] [2022-03-01 17:09:39,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:39,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:39,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:39,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401471657] [2022-03-01 17:09:39,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401471657] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:39,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427753163] [2022-03-01 17:09:39,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:09:39,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:39,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:39,614 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) [2022-03-01 17:09:39,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-01 17:09:39,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-01 17:09:39,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:39,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:39,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:39,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:39,772 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:09:39,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:09:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:39,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427753163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:39,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:39,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-03-01 17:09:39,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541085722] [2022-03-01 17:09:39,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:39,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:09:39,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:39,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:09:39,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:09:39,825 INFO L87 Difference]: Start difference. First operand 6276 states and 15970 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:40,201 INFO L93 Difference]: Finished difference Result 8204 states and 19910 transitions. [2022-03-01 17:09:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:09:40,202 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:40,211 INFO L225 Difference]: With dead ends: 8204 [2022-03-01 17:09:40,211 INFO L226 Difference]: Without dead ends: 7841 [2022-03-01 17:09:40,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:09:40,212 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 202 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:40,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 164 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7841 states. [2022-03-01 17:09:40,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7841 to 5950. [2022-03-01 17:09:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5950 states, 5949 states have (on average 2.533198856950748) internal successors, (15070), 5949 states have internal predecessors, (15070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5950 states to 5950 states and 15070 transitions. [2022-03-01 17:09:40,292 INFO L78 Accepts]: Start accepts. Automaton has 5950 states and 15070 transitions. Word has length 41 [2022-03-01 17:09:40,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:40,292 INFO L470 AbstractCegarLoop]: Abstraction has 5950 states and 15070 transitions. [2022-03-01 17:09:40,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 5950 states and 15070 transitions. [2022-03-01 17:09:40,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:40,298 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:40,298 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:40,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-01 17:09:40,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:40,499 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:40,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:40,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1266012341, now seen corresponding path program 32 times [2022-03-01 17:09:40,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:40,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829359742] [2022-03-01 17:09:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:40,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:40,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:40,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829359742] [2022-03-01 17:09:40,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829359742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:40,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75991181] [2022-03-01 17:09:40,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:09:40,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:40,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:40,564 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) [2022-03-01 17:09:40,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-01 17:09:40,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:09:40,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:40,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:09:40,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:40,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:40,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75991181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:40,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:40,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-03-01 17:09:40,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261995345] [2022-03-01 17:09:40,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:40,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:09:40,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:40,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:09:40,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:09:40,899 INFO L87 Difference]: Start difference. First operand 5950 states and 15070 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:41,240 INFO L93 Difference]: Finished difference Result 7335 states and 18009 transitions. [2022-03-01 17:09:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:09:41,240 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:41,250 INFO L225 Difference]: With dead ends: 7335 [2022-03-01 17:09:41,250 INFO L226 Difference]: Without dead ends: 7305 [2022-03-01 17:09:41,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:09:41,250 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 201 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:41,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 218 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:09:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7305 states. [2022-03-01 17:09:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7305 to 6289. [2022-03-01 17:09:41,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6289 states, 6288 states have (on average 2.55089058524173) internal successors, (16040), 6288 states have internal predecessors, (16040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6289 states to 6289 states and 16040 transitions. [2022-03-01 17:09:41,334 INFO L78 Accepts]: Start accepts. Automaton has 6289 states and 16040 transitions. Word has length 41 [2022-03-01 17:09:41,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:41,334 INFO L470 AbstractCegarLoop]: Abstraction has 6289 states and 16040 transitions. [2022-03-01 17:09:41,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:41,334 INFO L276 IsEmpty]: Start isEmpty. Operand 6289 states and 16040 transitions. [2022-03-01 17:09:41,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:41,340 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:41,340 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:41,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-01 17:09:41,540 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,SelfDestructingSolverStorable132 [2022-03-01 17:09:41,540 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:41,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:41,540 INFO L85 PathProgramCache]: Analyzing trace with hash 644131931, now seen corresponding path program 33 times [2022-03-01 17:09:41,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:41,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344527344] [2022-03-01 17:09:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:41,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:41,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:41,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344527344] [2022-03-01 17:09:41,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344527344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:41,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204535370] [2022-03-01 17:09:41,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:09:41,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:41,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:41,628 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) [2022-03-01 17:09:41,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-01 17:09:41,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-01 17:09:41,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:41,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:09:41,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:41,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:41,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204535370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:41,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:41,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 13 [2022-03-01 17:09:41,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610497546] [2022-03-01 17:09:41,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:41,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:09:41,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:41,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:09:41,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:09:41,974 INFO L87 Difference]: Start difference. First operand 6289 states and 16040 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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) [2022-03-01 17:09:42,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:42,309 INFO L93 Difference]: Finished difference Result 8957 states and 21773 transitions. [2022-03-01 17:09:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:09:42,309 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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 41 [2022-03-01 17:09:42,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:42,326 INFO L225 Difference]: With dead ends: 8957 [2022-03-01 17:09:42,326 INFO L226 Difference]: Without dead ends: 8957 [2022-03-01 17:09:42,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=248, Invalid=454, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:09:42,327 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 458 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:42,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 130 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:42,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8957 states. [2022-03-01 17:09:42,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8957 to 6352. [2022-03-01 17:09:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6352 states, 6351 states have (on average 2.555188159344985) internal successors, (16228), 6351 states have internal predecessors, (16228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6352 states to 6352 states and 16228 transitions. [2022-03-01 17:09:42,455 INFO L78 Accepts]: Start accepts. Automaton has 6352 states and 16228 transitions. Word has length 41 [2022-03-01 17:09:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:42,455 INFO L470 AbstractCegarLoop]: Abstraction has 6352 states and 16228 transitions. [2022-03-01 17:09:42,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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) [2022-03-01 17:09:42,455 INFO L276 IsEmpty]: Start isEmpty. Operand 6352 states and 16228 transitions. [2022-03-01 17:09:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:42,460 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:42,460 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:42,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-01 17:09:42,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-01 17:09:42,660 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:42,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1611531607, now seen corresponding path program 34 times [2022-03-01 17:09:42,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:42,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621045555] [2022-03-01 17:09:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:42,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:42,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:42,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621045555] [2022-03-01 17:09:42,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621045555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:42,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542828104] [2022-03-01 17:09:42,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:09:42,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:42,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:42,747 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) [2022-03-01 17:09:42,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-01 17:09:42,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:09:42,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:42,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:09:42,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 51 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:42,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 38 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:43,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542828104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:43,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:43,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 21 [2022-03-01 17:09:43,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356851864] [2022-03-01 17:09:43,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:43,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:09:43,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:43,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:09:43,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:09:43,257 INFO L87 Difference]: Start difference. First operand 6352 states and 16228 transitions. Second operand has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:43,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:43,853 INFO L93 Difference]: Finished difference Result 9472 states and 23437 transitions. [2022-03-01 17:09:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:09:43,854 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-01 17:09:43,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:43,867 INFO L225 Difference]: With dead ends: 9472 [2022-03-01 17:09:43,867 INFO L226 Difference]: Without dead ends: 9459 [2022-03-01 17:09:43,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=841, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:09:43,868 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 393 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:43,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 235 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:09:43,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9459 states. [2022-03-01 17:09:43,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9459 to 6169. [2022-03-01 17:09:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6169 states, 6168 states have (on average 2.5372892347600517) internal successors, (15650), 6168 states have internal predecessors, (15650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6169 states to 6169 states and 15650 transitions. [2022-03-01 17:09:43,978 INFO L78 Accepts]: Start accepts. Automaton has 6169 states and 15650 transitions. Word has length 41 [2022-03-01 17:09:43,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:43,978 INFO L470 AbstractCegarLoop]: Abstraction has 6169 states and 15650 transitions. [2022-03-01 17:09:43,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 6169 states and 15650 transitions. [2022-03-01 17:09:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-01 17:09:44,001 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:44,001 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:44,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-01 17:09:44,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:44,202 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:44,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:44,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2041475785, now seen corresponding path program 54 times [2022-03-01 17:09:44,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:44,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116729400] [2022-03-01 17:09:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:44,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:44,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:44,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116729400] [2022-03-01 17:09:44,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116729400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:44,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938716691] [2022-03-01 17:09:44,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:09:44,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:44,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:44,299 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) [2022-03-01 17:09:44,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-01 17:09:44,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:09:44,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:44,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:09:44,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:44,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:44,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938716691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:44,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:44,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 15 [2022-03-01 17:09:44,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628470469] [2022-03-01 17:09:44,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:44,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:09:44,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:44,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:09:44,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:09:44,636 INFO L87 Difference]: Start difference. First operand 6169 states and 15650 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 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) [2022-03-01 17:09:44,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:44,894 INFO L93 Difference]: Finished difference Result 7598 states and 18548 transitions. [2022-03-01 17:09:44,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:09:44,895 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 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 41 [2022-03-01 17:09:44,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:44,906 INFO L225 Difference]: With dead ends: 7598 [2022-03-01 17:09:44,906 INFO L226 Difference]: Without dead ends: 7507 [2022-03-01 17:09:44,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:09:44,906 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 182 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:44,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 171 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7507 states. [2022-03-01 17:09:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7507 to 6112. [2022-03-01 17:09:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6112 states, 6111 states have (on average 2.5391916216658483) internal successors, (15517), 6111 states have internal predecessors, (15517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:45,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6112 states to 6112 states and 15517 transitions. [2022-03-01 17:09:45,002 INFO L78 Accepts]: Start accepts. Automaton has 6112 states and 15517 transitions. Word has length 41 [2022-03-01 17:09:45,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:45,002 INFO L470 AbstractCegarLoop]: Abstraction has 6112 states and 15517 transitions. [2022-03-01 17:09:45,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 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) [2022-03-01 17:09:45,003 INFO L276 IsEmpty]: Start isEmpty. Operand 6112 states and 15517 transitions. [2022-03-01 17:09:45,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 17:09:45,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:45,009 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:45,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-01 17:09:45,210 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,SelfDestructingSolverStorable135 [2022-03-01 17:09:45,210 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:45,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:45,210 INFO L85 PathProgramCache]: Analyzing trace with hash 554202670, now seen corresponding path program 35 times [2022-03-01 17:09:45,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:45,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174997688] [2022-03-01 17:09:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:45,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:45,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:45,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174997688] [2022-03-01 17:09:45,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174997688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:45,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761262344] [2022-03-01 17:09:45,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:09:45,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:45,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:45,308 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) [2022-03-01 17:09:45,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-01 17:09:45,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-01 17:09:45,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:45,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:09:45,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:45,431 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 75 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:45,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:45,476 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:09:45,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:09:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 75 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:45,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761262344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:45,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:45,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-03-01 17:09:45,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894373142] [2022-03-01 17:09:45,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:45,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:09:45,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:45,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:09:45,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:09:45,528 INFO L87 Difference]: Start difference. First operand 6112 states and 15517 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:45,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:45,865 INFO L93 Difference]: Finished difference Result 7851 states and 19160 transitions. [2022-03-01 17:09:45,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:09:45,865 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-01 17:09:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:45,874 INFO L225 Difference]: With dead ends: 7851 [2022-03-01 17:09:45,874 INFO L226 Difference]: Without dead ends: 7366 [2022-03-01 17:09:45,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:09:45,875 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:45,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 152 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7366 states. [2022-03-01 17:09:45,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7366 to 5090. [2022-03-01 17:09:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5090 states, 5089 states have (on average 2.5356651601493416) internal successors, (12904), 5089 states have internal predecessors, (12904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5090 states to 5090 states and 12904 transitions. [2022-03-01 17:09:45,938 INFO L78 Accepts]: Start accepts. Automaton has 5090 states and 12904 transitions. Word has length 44 [2022-03-01 17:09:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:45,938 INFO L470 AbstractCegarLoop]: Abstraction has 5090 states and 12904 transitions. [2022-03-01 17:09:45,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 5090 states and 12904 transitions. [2022-03-01 17:09:45,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 17:09:45,943 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:45,943 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:45,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-01 17:09:46,143 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,SelfDestructingSolverStorable136 [2022-03-01 17:09:46,143 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:46,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:46,144 INFO L85 PathProgramCache]: Analyzing trace with hash 831381294, now seen corresponding path program 55 times [2022-03-01 17:09:46,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:46,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74591807] [2022-03-01 17:09:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:46,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:09:46,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:46,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74591807] [2022-03-01 17:09:46,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74591807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:46,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009142261] [2022-03-01 17:09:46,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:09:46,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:46,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:46,207 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) [2022-03-01 17:09:46,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-01 17:09:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:46,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:09:46,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:46,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:46,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009142261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:46,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:46,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 13] total 19 [2022-03-01 17:09:46,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877078316] [2022-03-01 17:09:46,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:46,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:09:46,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:46,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:09:46,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:09:46,763 INFO L87 Difference]: Start difference. First operand 5090 states and 12904 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:47,708 INFO L93 Difference]: Finished difference Result 6929 states and 16718 transitions. [2022-03-01 17:09:47,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:09:47,711 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-01 17:09:47,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:47,721 INFO L225 Difference]: With dead ends: 6929 [2022-03-01 17:09:47,721 INFO L226 Difference]: Without dead ends: 6876 [2022-03-01 17:09:47,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=473, Invalid=1783, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:09:47,722 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 512 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:47,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 570 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:09:47,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2022-03-01 17:09:47,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 5518. [2022-03-01 17:09:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5518 states, 5517 states have (on average 2.5261917708899766) internal successors, (13937), 5517 states have internal predecessors, (13937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5518 states to 5518 states and 13937 transitions. [2022-03-01 17:09:47,792 INFO L78 Accepts]: Start accepts. Automaton has 5518 states and 13937 transitions. Word has length 44 [2022-03-01 17:09:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:47,792 INFO L470 AbstractCegarLoop]: Abstraction has 5518 states and 13937 transitions. [2022-03-01 17:09:47,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:47,793 INFO L276 IsEmpty]: Start isEmpty. Operand 5518 states and 13937 transitions. [2022-03-01 17:09:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 17:09:47,797 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:47,797 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:47,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-01 17:09:47,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:47,998 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:47,998 INFO L85 PathProgramCache]: Analyzing trace with hash -945685074, now seen corresponding path program 56 times [2022-03-01 17:09:47,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:47,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692597177] [2022-03-01 17:09:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:47,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 17:09:48,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:48,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692597177] [2022-03-01 17:09:48,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692597177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:48,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369973234] [2022-03-01 17:09:48,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:09:48,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:48,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:48,061 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) [2022-03-01 17:09:48,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-01 17:09:48,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:09:48,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:48,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:09:48,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:48,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:09:48,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369973234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:48,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:48,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2022-03-01 17:09:48,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626808201] [2022-03-01 17:09:48,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:48,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:09:48,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:48,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:09:48,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:09:48,476 INFO L87 Difference]: Start difference. First operand 5518 states and 13937 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:49,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:49,054 INFO L93 Difference]: Finished difference Result 7876 states and 18896 transitions. [2022-03-01 17:09:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:09:49,054 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-01 17:09:49,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:49,064 INFO L225 Difference]: With dead ends: 7876 [2022-03-01 17:09:49,064 INFO L226 Difference]: Without dead ends: 7790 [2022-03-01 17:09:49,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:09:49,064 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 327 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:49,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 447 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:09:49,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2022-03-01 17:09:49,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 5713. [2022-03-01 17:09:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5713 states, 5712 states have (on average 2.527310924369748) internal successors, (14436), 5712 states have internal predecessors, (14436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5713 states to 5713 states and 14436 transitions. [2022-03-01 17:09:49,140 INFO L78 Accepts]: Start accepts. Automaton has 5713 states and 14436 transitions. Word has length 44 [2022-03-01 17:09:49,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:49,140 INFO L470 AbstractCegarLoop]: Abstraction has 5713 states and 14436 transitions. [2022-03-01 17:09:49,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 5713 states and 14436 transitions. [2022-03-01 17:09:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 17:09:49,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:49,145 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:49,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-01 17:09:49,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:49,345 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:49,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:49,345 INFO L85 PathProgramCache]: Analyzing trace with hash 870670370, now seen corresponding path program 57 times [2022-03-01 17:09:49,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:49,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024602839] [2022-03-01 17:09:49,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:49,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 17:09:49,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:49,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024602839] [2022-03-01 17:09:49,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024602839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:49,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606416552] [2022-03-01 17:09:49,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:09:49,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:49,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:49,407 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) [2022-03-01 17:09:49,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-01 17:09:49,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-01 17:09:49,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:49,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:09:49,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 17:09:49,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 17:09:49,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606416552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:49,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:49,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-03-01 17:09:49,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463208240] [2022-03-01 17:09:49,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:49,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:09:49,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:49,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:09:49,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:09:49,663 INFO L87 Difference]: Start difference. First operand 5713 states and 14436 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:49,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:49,867 INFO L93 Difference]: Finished difference Result 6518 states and 16133 transitions. [2022-03-01 17:09:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:09:49,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-01 17:09:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:49,898 INFO L225 Difference]: With dead ends: 6518 [2022-03-01 17:09:49,898 INFO L226 Difference]: Without dead ends: 6463 [2022-03-01 17:09:49,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 12 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:09:49,898 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 69 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:49,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 215 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6463 states. [2022-03-01 17:09:49,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6463 to 5774. [2022-03-01 17:09:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5774 states, 5773 states have (on average 2.5174086263641087) internal successors, (14533), 5773 states have internal predecessors, (14533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5774 states to 5774 states and 14533 transitions. [2022-03-01 17:09:49,964 INFO L78 Accepts]: Start accepts. Automaton has 5774 states and 14533 transitions. Word has length 44 [2022-03-01 17:09:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:49,964 INFO L470 AbstractCegarLoop]: Abstraction has 5774 states and 14533 transitions. [2022-03-01 17:09:49,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 5774 states and 14533 transitions. [2022-03-01 17:09:49,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 17:09:49,969 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:49,969 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:49,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-01 17:09:50,169 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,SelfDestructingSolverStorable139 [2022-03-01 17:09:50,170 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:50,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:50,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1834663790, now seen corresponding path program 58 times [2022-03-01 17:09:50,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:50,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329228276] [2022-03-01 17:09:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:50,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 17:09:50,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:50,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329228276] [2022-03-01 17:09:50,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329228276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:50,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005044577] [2022-03-01 17:09:50,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:09:50,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:50,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:50,233 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) [2022-03-01 17:09:50,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-01 17:09:50,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:09:50,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:50,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:09:50,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 17:09:50,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 17:09:50,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005044577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:50,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:50,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-03-01 17:09:50,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571303981] [2022-03-01 17:09:50,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:50,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:09:50,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:50,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:09:50,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:09:50,488 INFO L87 Difference]: Start difference. First operand 5774 states and 14533 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:50,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:50,703 INFO L93 Difference]: Finished difference Result 6620 states and 16340 transitions. [2022-03-01 17:09:50,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:09:50,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-01 17:09:50,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:50,713 INFO L225 Difference]: With dead ends: 6620 [2022-03-01 17:09:50,713 INFO L226 Difference]: Without dead ends: 6583 [2022-03-01 17:09:50,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 12 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:09:50,714 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 70 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:50,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 215 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:50,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2022-03-01 17:09:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 5870. [2022-03-01 17:09:50,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5870 states, 5869 states have (on average 2.508263758732322) internal successors, (14721), 5869 states have internal predecessors, (14721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5870 states to 5870 states and 14721 transitions. [2022-03-01 17:09:50,797 INFO L78 Accepts]: Start accepts. Automaton has 5870 states and 14721 transitions. Word has length 44 [2022-03-01 17:09:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:50,797 INFO L470 AbstractCegarLoop]: Abstraction has 5870 states and 14721 transitions. [2022-03-01 17:09:50,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 5870 states and 14721 transitions. [2022-03-01 17:09:50,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-01 17:09:50,803 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:50,803 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:50,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-01 17:09:51,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:51,004 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:51,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:51,004 INFO L85 PathProgramCache]: Analyzing trace with hash 678113582, now seen corresponding path program 59 times [2022-03-01 17:09:51,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:51,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633166962] [2022-03-01 17:09:51,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:51,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:09:51,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:51,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633166962] [2022-03-01 17:09:51,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633166962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:51,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612843886] [2022-03-01 17:09:51,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:09:51,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:51,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:51,069 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) [2022-03-01 17:09:51,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-01 17:09:51,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-01 17:09:51,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:09:51,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:51,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:51,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612843886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:51,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:51,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 17 [2022-03-01 17:09:51,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594010793] [2022-03-01 17:09:51,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:51,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:09:51,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:51,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:09:51,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:09:51,491 INFO L87 Difference]: Start difference. First operand 5870 states and 14721 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:52,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:52,285 INFO L93 Difference]: Finished difference Result 8381 states and 19886 transitions. [2022-03-01 17:09:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:09:52,286 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-01 17:09:52,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:52,299 INFO L225 Difference]: With dead ends: 8381 [2022-03-01 17:09:52,299 INFO L226 Difference]: Without dead ends: 8350 [2022-03-01 17:09:52,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:09:52,300 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 413 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:52,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 604 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:09:52,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8350 states. [2022-03-01 17:09:52,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8350 to 6049. [2022-03-01 17:09:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6049 states, 6048 states have (on average 2.4945436507936507) internal successors, (15087), 6048 states have internal predecessors, (15087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6049 states to 6049 states and 15087 transitions. [2022-03-01 17:09:52,434 INFO L78 Accepts]: Start accepts. Automaton has 6049 states and 15087 transitions. Word has length 44 [2022-03-01 17:09:52,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:52,434 INFO L470 AbstractCegarLoop]: Abstraction has 6049 states and 15087 transitions. [2022-03-01 17:09:52,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:52,434 INFO L276 IsEmpty]: Start isEmpty. Operand 6049 states and 15087 transitions. [2022-03-01 17:09:52,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:09:52,439 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:52,439 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:52,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-01 17:09:52,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:52,640 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:52,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:52,640 INFO L85 PathProgramCache]: Analyzing trace with hash -98819019, now seen corresponding path program 36 times [2022-03-01 17:09:52,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:52,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801017348] [2022-03-01 17:09:52,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:52,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:52,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:52,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801017348] [2022-03-01 17:09:52,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801017348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:52,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201943176] [2022-03-01 17:09:52,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:09:52,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:52,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:52,758 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) [2022-03-01 17:09:52,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-01 17:09:52,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-01 17:09:52,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:52,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:09:52,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:52,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:52,939 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:09:52,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:09:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:53,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201943176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:53,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:53,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 14 [2022-03-01 17:09:53,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754521712] [2022-03-01 17:09:53,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:53,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:09:53,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:53,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:09:53,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:09:53,002 INFO L87 Difference]: Start difference. First operand 6049 states and 15087 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:53,631 INFO L93 Difference]: Finished difference Result 7892 states and 19138 transitions. [2022-03-01 17:09:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:09:53,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:09:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:53,642 INFO L225 Difference]: With dead ends: 7892 [2022-03-01 17:09:53,642 INFO L226 Difference]: Without dead ends: 7793 [2022-03-01 17:09:53,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:09:53,642 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 436 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:53,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 550 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:09:53,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2022-03-01 17:09:53,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 6455. [2022-03-01 17:09:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6455 states, 6454 states have (on average 2.4806321660985438) internal successors, (16010), 6454 states have internal predecessors, (16010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6455 states to 6455 states and 16010 transitions. [2022-03-01 17:09:53,724 INFO L78 Accepts]: Start accepts. Automaton has 6455 states and 16010 transitions. Word has length 47 [2022-03-01 17:09:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:53,724 INFO L470 AbstractCegarLoop]: Abstraction has 6455 states and 16010 transitions. [2022-03-01 17:09:53,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6455 states and 16010 transitions. [2022-03-01 17:09:53,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:09:53,729 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:53,729 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:53,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-01 17:09:53,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:53,930 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:53,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:53,930 INFO L85 PathProgramCache]: Analyzing trace with hash 2073614069, now seen corresponding path program 60 times [2022-03-01 17:09:53,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:53,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032965513] [2022-03-01 17:09:53,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:53,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:54,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:54,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032965513] [2022-03-01 17:09:54,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032965513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:54,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312375088] [2022-03-01 17:09:54,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:09:54,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:54,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:54,014 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) [2022-03-01 17:09:54,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-01 17:09:54,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-01 17:09:54,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:54,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:09:54,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:54,426 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-01 17:09:54,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2022-03-01 17:09:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:54,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:54,557 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:54,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 35 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:55,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312375088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:55,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:55,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16, 16] total 30 [2022-03-01 17:09:55,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204119357] [2022-03-01 17:09:55,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:55,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:09:55,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:55,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:09:55,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:09:55,153 INFO L87 Difference]: Start difference. First operand 6455 states and 16010 transitions. Second operand has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:56,620 INFO L93 Difference]: Finished difference Result 8318 states and 19574 transitions. [2022-03-01 17:09:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:09:56,620 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:09:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:56,631 INFO L225 Difference]: With dead ends: 8318 [2022-03-01 17:09:56,631 INFO L226 Difference]: Without dead ends: 8286 [2022-03-01 17:09:56,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1202, Invalid=4054, Unknown=0, NotChecked=0, Total=5256 [2022-03-01 17:09:56,632 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 566 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 2428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 743 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:56,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 741 Invalid, 2428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1567 Invalid, 0 Unknown, 743 Unchecked, 0.6s Time] [2022-03-01 17:09:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8286 states. [2022-03-01 17:09:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8286 to 6506. [2022-03-01 17:09:56,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6506 states, 6505 states have (on average 2.4799385088393544) internal successors, (16132), 6505 states have internal predecessors, (16132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6506 states to 6506 states and 16132 transitions. [2022-03-01 17:09:56,715 INFO L78 Accepts]: Start accepts. Automaton has 6506 states and 16132 transitions. Word has length 47 [2022-03-01 17:09:56,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:56,715 INFO L470 AbstractCegarLoop]: Abstraction has 6506 states and 16132 transitions. [2022-03-01 17:09:56,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 6506 states and 16132 transitions. [2022-03-01 17:09:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:09:56,720 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:56,720 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:56,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-01 17:09:56,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:56,921 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:56,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1460077889, now seen corresponding path program 61 times [2022-03-01 17:09:56,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:56,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579971712] [2022-03-01 17:09:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:56,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:57,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:57,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579971712] [2022-03-01 17:09:57,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579971712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:57,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73106853] [2022-03-01 17:09:57,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:09:57,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:57,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:57,011 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) [2022-03-01 17:09:57,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-01 17:09:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:57,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:09:57,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:57,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:57,194 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:09:57,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:09:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:57,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73106853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:57,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:57,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:09:57,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715580443] [2022-03-01 17:09:57,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:57,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:09:57,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:57,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:09:57,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:09:57,300 INFO L87 Difference]: Start difference. First operand 6506 states and 16132 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:57,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:57,579 INFO L93 Difference]: Finished difference Result 7055 states and 17180 transitions. [2022-03-01 17:09:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:09:57,580 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:09:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:57,588 INFO L225 Difference]: With dead ends: 7055 [2022-03-01 17:09:57,588 INFO L226 Difference]: Without dead ends: 7037 [2022-03-01 17:09:57,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:09:57,588 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 76 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:57,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 227 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:57,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7037 states. [2022-03-01 17:09:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7037 to 6532. [2022-03-01 17:09:57,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6532 states, 6531 states have (on average 2.480324605726535) internal successors, (16199), 6531 states have internal predecessors, (16199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6532 states to 6532 states and 16199 transitions. [2022-03-01 17:09:57,664 INFO L78 Accepts]: Start accepts. Automaton has 6532 states and 16199 transitions. Word has length 47 [2022-03-01 17:09:57,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:57,664 INFO L470 AbstractCegarLoop]: Abstraction has 6532 states and 16199 transitions. [2022-03-01 17:09:57,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:57,664 INFO L276 IsEmpty]: Start isEmpty. Operand 6532 states and 16199 transitions. [2022-03-01 17:09:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:09:57,669 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:57,669 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:57,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-01 17:09:57,870 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,SelfDestructingSolverStorable144 [2022-03-01 17:09:57,870 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:57,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1012835979, now seen corresponding path program 62 times [2022-03-01 17:09:57,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:57,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153969031] [2022-03-01 17:09:57,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:57,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:57,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:57,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153969031] [2022-03-01 17:09:57,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153969031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:57,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441542538] [2022-03-01 17:09:57,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:09:57,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:57,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:57,967 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) [2022-03-01 17:09:57,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-01 17:09:57,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:09:57,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:09:57,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:09:57,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:58,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:58,228 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:09:58,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:09:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:09:58,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441542538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:58,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:58,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:09:58,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904307097] [2022-03-01 17:09:58,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:58,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:09:58,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:58,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:09:58,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:09:58,331 INFO L87 Difference]: Start difference. First operand 6532 states and 16199 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:58,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:58,641 INFO L93 Difference]: Finished difference Result 6889 states and 16801 transitions. [2022-03-01 17:09:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:09:58,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:09:58,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:58,650 INFO L225 Difference]: With dead ends: 6889 [2022-03-01 17:09:58,650 INFO L226 Difference]: Without dead ends: 6837 [2022-03-01 17:09:58,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:09:58,650 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 72 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:58,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 290 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:09:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6837 states. [2022-03-01 17:09:58,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6837 to 6526. [2022-03-01 17:09:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6526 states, 6525 states have (on average 2.478927203065134) internal successors, (16175), 6525 states have internal predecessors, (16175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6526 states to 6526 states and 16175 transitions. [2022-03-01 17:09:58,724 INFO L78 Accepts]: Start accepts. Automaton has 6526 states and 16175 transitions. Word has length 47 [2022-03-01 17:09:58,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:58,724 INFO L470 AbstractCegarLoop]: Abstraction has 6526 states and 16175 transitions. [2022-03-01 17:09:58,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:58,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6526 states and 16175 transitions. [2022-03-01 17:09:58,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:09:58,729 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:58,729 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:58,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-03-01 17:09:58,930 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,SelfDestructingSolverStorable145 [2022-03-01 17:09:58,930 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:09:58,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:09:58,930 INFO L85 PathProgramCache]: Analyzing trace with hash 595441160, now seen corresponding path program 37 times [2022-03-01 17:09:58,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:09:58,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800116421] [2022-03-01 17:09:58,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:09:58,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:09:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:59,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:09:59,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800116421] [2022-03-01 17:09:59,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800116421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:09:59,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415620472] [2022-03-01 17:09:59,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:09:59,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:09:59,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:09:59,009 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) [2022-03-01 17:09:59,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-01 17:09:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:09:59,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 17:09:59,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:09:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:59,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:09:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:09:59,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415620472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:09:59,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:09:59,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-03-01 17:09:59,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370386994] [2022-03-01 17:09:59,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:09:59,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:09:59,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:09:59,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:09:59,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:09:59,376 INFO L87 Difference]: Start difference. First operand 6526 states and 16175 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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) [2022-03-01 17:09:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:09:59,695 INFO L93 Difference]: Finished difference Result 10769 states and 26210 transitions. [2022-03-01 17:09:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:09:59,695 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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 47 [2022-03-01 17:09:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:09:59,710 INFO L225 Difference]: With dead ends: 10769 [2022-03-01 17:09:59,710 INFO L226 Difference]: Without dead ends: 10769 [2022-03-01 17:09:59,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:09:59,710 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 327 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:09:59,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 145 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:09:59,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10769 states. [2022-03-01 17:09:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10769 to 8006. [2022-03-01 17:09:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8006 states, 8005 states have (on average 2.5630231105559025) internal successors, (20517), 8005 states have internal predecessors, (20517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:09:59,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8006 states to 8006 states and 20517 transitions. [2022-03-01 17:09:59,832 INFO L78 Accepts]: Start accepts. Automaton has 8006 states and 20517 transitions. Word has length 47 [2022-03-01 17:09:59,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:09:59,832 INFO L470 AbstractCegarLoop]: Abstraction has 8006 states and 20517 transitions. [2022-03-01 17:09:59,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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) [2022-03-01 17:09:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 8006 states and 20517 transitions. [2022-03-01 17:09:59,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:09:59,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:09:59,839 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:09:59,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-03-01 17:10:00,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-01 17:10:00,039 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:00,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:00,040 INFO L85 PathProgramCache]: Analyzing trace with hash 61575784, now seen corresponding path program 63 times [2022-03-01 17:10:00,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:00,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646663611] [2022-03-01 17:10:00,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:00,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:10:00,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:00,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646663611] [2022-03-01 17:10:00,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646663611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:00,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503428059] [2022-03-01 17:10:00,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:10:00,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:00,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:00,124 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) [2022-03-01 17:10:00,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-01 17:10:00,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 17:10:00,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:00,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 17:10:00,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:00,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:00,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503428059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:00,504 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:00,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2022-03-01 17:10:00,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872605810] [2022-03-01 17:10:00,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:00,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:10:00,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:00,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:10:00,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:10:00,505 INFO L87 Difference]: Start difference. First operand 8006 states and 20517 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 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) [2022-03-01 17:10:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:00,842 INFO L93 Difference]: Finished difference Result 9351 states and 23522 transitions. [2022-03-01 17:10:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:10:00,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 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 47 [2022-03-01 17:10:00,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:00,854 INFO L225 Difference]: With dead ends: 9351 [2022-03-01 17:10:00,854 INFO L226 Difference]: Without dead ends: 9264 [2022-03-01 17:10:00,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:10:00,855 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 132 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:00,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 170 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:10:00,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9264 states. [2022-03-01 17:10:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9264 to 8152. [2022-03-01 17:10:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8152 states, 8151 states have (on average 2.5668016194331984) internal successors, (20922), 8151 states have internal predecessors, (20922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8152 states to 8152 states and 20922 transitions. [2022-03-01 17:10:00,961 INFO L78 Accepts]: Start accepts. Automaton has 8152 states and 20922 transitions. Word has length 47 [2022-03-01 17:10:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:00,961 INFO L470 AbstractCegarLoop]: Abstraction has 8152 states and 20922 transitions. [2022-03-01 17:10:00,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 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) [2022-03-01 17:10:00,962 INFO L276 IsEmpty]: Start isEmpty. Operand 8152 states and 20922 transitions. [2022-03-01 17:10:00,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:00,969 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:00,969 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:00,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-01 17:10:01,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-01 17:10:01,170 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:01,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:01,171 INFO L85 PathProgramCache]: Analyzing trace with hash -243997515, now seen corresponding path program 38 times [2022-03-01 17:10:01,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:01,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465482699] [2022-03-01 17:10:01,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:01,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:01,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:01,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465482699] [2022-03-01 17:10:01,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465482699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:01,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330633809] [2022-03-01 17:10:01,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:10:01,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:01,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:01,258 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) [2022-03-01 17:10:01,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-01 17:10:01,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:10:01,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:01,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:01,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:01,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:01,426 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:10:01,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:10:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:01,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330633809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:01,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:01,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:10:01,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827364167] [2022-03-01 17:10:01,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:01,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:10:01,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:01,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:10:01,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:10:01,530 INFO L87 Difference]: Start difference. First operand 8152 states and 20922 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:01,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:01,850 INFO L93 Difference]: Finished difference Result 9461 states and 23705 transitions. [2022-03-01 17:10:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:10:01,851 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:01,864 INFO L225 Difference]: With dead ends: 9461 [2022-03-01 17:10:01,864 INFO L226 Difference]: Without dead ends: 9418 [2022-03-01 17:10:01,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:10:01,864 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 172 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:01,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 305 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:10:01,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9418 states. [2022-03-01 17:10:01,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9418 to 8416. [2022-03-01 17:10:01,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8416 states, 8415 states have (on average 2.5622103386809267) internal successors, (21561), 8415 states have internal predecessors, (21561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:01,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8416 states to 8416 states and 21561 transitions. [2022-03-01 17:10:01,986 INFO L78 Accepts]: Start accepts. Automaton has 8416 states and 21561 transitions. Word has length 47 [2022-03-01 17:10:01,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:01,986 INFO L470 AbstractCegarLoop]: Abstraction has 8416 states and 21561 transitions. [2022-03-01 17:10:01,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:01,986 INFO L276 IsEmpty]: Start isEmpty. Operand 8416 states and 21561 transitions. [2022-03-01 17:10:01,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:01,994 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:01,994 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:02,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-01 17:10:02,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:02,198 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:02,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:02,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1256335477, now seen corresponding path program 64 times [2022-03-01 17:10:02,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:02,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729439533] [2022-03-01 17:10:02,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:02,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:02,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:02,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729439533] [2022-03-01 17:10:02,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729439533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:02,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055707469] [2022-03-01 17:10:02,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:10:02,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:02,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:02,282 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) [2022-03-01 17:10:02,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-01 17:10:02,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:10:02,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:02,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:02,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:02,431 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:02,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:02,454 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:10:02,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:10:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:02,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055707469] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:02,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:02,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-03-01 17:10:02,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910335540] [2022-03-01 17:10:02,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:02,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:10:02,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:02,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:10:02,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:10:02,559 INFO L87 Difference]: Start difference. First operand 8416 states and 21561 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:02,937 INFO L93 Difference]: Finished difference Result 8989 states and 22650 transitions. [2022-03-01 17:10:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:10:02,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:02,951 INFO L225 Difference]: With dead ends: 8989 [2022-03-01 17:10:02,951 INFO L226 Difference]: Without dead ends: 8939 [2022-03-01 17:10:02,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:10:02,952 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 98 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:02,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 307 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:10:02,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8939 states. [2022-03-01 17:10:03,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8939 to 8383. [2022-03-01 17:10:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8383 states, 8382 states have (on average 2.5600095442615127) internal successors, (21458), 8382 states have internal predecessors, (21458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:03,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8383 states to 8383 states and 21458 transitions. [2022-03-01 17:10:03,101 INFO L78 Accepts]: Start accepts. Automaton has 8383 states and 21458 transitions. Word has length 47 [2022-03-01 17:10:03,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:03,101 INFO L470 AbstractCegarLoop]: Abstraction has 8383 states and 21458 transitions. [2022-03-01 17:10:03,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:03,101 INFO L276 IsEmpty]: Start isEmpty. Operand 8383 states and 21458 transitions. [2022-03-01 17:10:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:03,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:03,110 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:03,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-03-01 17:10:03,310 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,SelfDestructingSolverStorable149 [2022-03-01 17:10:03,310 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:03,311 INFO L85 PathProgramCache]: Analyzing trace with hash 642799297, now seen corresponding path program 65 times [2022-03-01 17:10:03,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:03,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785506193] [2022-03-01 17:10:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:03,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:10:03,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:03,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785506193] [2022-03-01 17:10:03,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785506193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:03,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915521551] [2022-03-01 17:10:03,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:10:03,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:03,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:03,399 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) [2022-03-01 17:10:03,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-01 17:10:03,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-01 17:10:03,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:03,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:03,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:10:03,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:03,562 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:10:03,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:10:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:10:03,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915521551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:03,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:03,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:10:03,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106650102] [2022-03-01 17:10:03,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:03,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:10:03,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:03,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:10:03,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:10:03,667 INFO L87 Difference]: Start difference. First operand 8383 states and 21458 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:03,997 INFO L93 Difference]: Finished difference Result 9243 states and 23204 transitions. [2022-03-01 17:10:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:10:03,998 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:04,011 INFO L225 Difference]: With dead ends: 9243 [2022-03-01 17:10:04,011 INFO L226 Difference]: Without dead ends: 9207 [2022-03-01 17:10:04,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:10:04,011 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 119 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:04,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 300 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:10:04,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9207 states. [2022-03-01 17:10:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9207 to 8367. [2022-03-01 17:10:04,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8367 states, 8366 states have (on average 2.560482907004542) internal successors, (21421), 8366 states have internal predecessors, (21421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8367 states to 8367 states and 21421 transitions. [2022-03-01 17:10:04,140 INFO L78 Accepts]: Start accepts. Automaton has 8367 states and 21421 transitions. Word has length 47 [2022-03-01 17:10:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:04,140 INFO L470 AbstractCegarLoop]: Abstraction has 8367 states and 21421 transitions. [2022-03-01 17:10:04,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 8367 states and 21421 transitions. [2022-03-01 17:10:04,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:04,156 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:04,156 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:04,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-03-01 17:10:04,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:04,378 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:04,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:04,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1510250665, now seen corresponding path program 66 times [2022-03-01 17:10:04,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:04,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413214767] [2022-03-01 17:10:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:04,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:04,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:04,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413214767] [2022-03-01 17:10:04,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413214767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:04,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446744298] [2022-03-01 17:10:04,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:10:04,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:04,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:04,468 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) [2022-03-01 17:10:04,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-01 17:10:04,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-01 17:10:04,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:04,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:10:04,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:04,766 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-01 17:10:04,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2022-03-01 17:10:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 29 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:04,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:04,971 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:10:04,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:10:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 29 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:05,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446744298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:05,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:05,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 25 [2022-03-01 17:10:05,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292707975] [2022-03-01 17:10:05,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:05,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:10:05,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:05,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:10:05,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:10:05,124 INFO L87 Difference]: Start difference. First operand 8367 states and 21421 transitions. Second operand has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:09,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:09,663 INFO L93 Difference]: Finished difference Result 17429 states and 45611 transitions. [2022-03-01 17:10:09,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-03-01 17:10:09,663 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:09,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:09,690 INFO L225 Difference]: With dead ends: 17429 [2022-03-01 17:10:09,691 INFO L226 Difference]: Without dead ends: 17408 [2022-03-01 17:10:09,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 177 SyntacticMatches, 29 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17089 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6134, Invalid=29398, Unknown=0, NotChecked=0, Total=35532 [2022-03-01 17:10:09,692 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 448 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 2755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1124 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:09,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 528 Invalid, 2755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1546 Invalid, 0 Unknown, 1124 Unchecked, 0.6s Time] [2022-03-01 17:10:09,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17408 states. [2022-03-01 17:10:09,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17408 to 9303. [2022-03-01 17:10:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9303 states, 9302 states have (on average 2.619759191571705) internal successors, (24369), 9302 states have internal predecessors, (24369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9303 states to 9303 states and 24369 transitions. [2022-03-01 17:10:09,862 INFO L78 Accepts]: Start accepts. Automaton has 9303 states and 24369 transitions. Word has length 47 [2022-03-01 17:10:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:09,862 INFO L470 AbstractCegarLoop]: Abstraction has 9303 states and 24369 transitions. [2022-03-01 17:10:09,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:09,862 INFO L276 IsEmpty]: Start isEmpty. Operand 9303 states and 24369 transitions. [2022-03-01 17:10:09,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:09,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:09,874 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:09,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-01 17:10:10,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:10,095 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:10,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:10,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1200020823, now seen corresponding path program 67 times [2022-03-01 17:10:10,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:10,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731739482] [2022-03-01 17:10:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:10,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:10,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:10,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731739482] [2022-03-01 17:10:10,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731739482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:10,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860603463] [2022-03-01 17:10:10,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:10:10,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:10,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:10,181 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) [2022-03-01 17:10:10,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-01 17:10:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:10,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:10,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:10,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:10,358 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:10:10,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:10:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:10,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860603463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:10,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:10,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-01 17:10:10,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365713553] [2022-03-01 17:10:10,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:10,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:10:10,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:10,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:10:10,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:10:10,460 INFO L87 Difference]: Start difference. First operand 9303 states and 24369 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:10,890 INFO L93 Difference]: Finished difference Result 10692 states and 27212 transitions. [2022-03-01 17:10:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:10:10,890 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:10,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:10,905 INFO L225 Difference]: With dead ends: 10692 [2022-03-01 17:10:10,905 INFO L226 Difference]: Without dead ends: 10692 [2022-03-01 17:10:10,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:10:10,905 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 131 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:10,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 390 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:10:10,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10692 states. [2022-03-01 17:10:11,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10692 to 9321. [2022-03-01 17:10:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9321 states, 9320 states have (on average 2.620708154506438) internal successors, (24425), 9320 states have internal predecessors, (24425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9321 states to 9321 states and 24425 transitions. [2022-03-01 17:10:11,098 INFO L78 Accepts]: Start accepts. Automaton has 9321 states and 24425 transitions. Word has length 47 [2022-03-01 17:10:11,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:11,099 INFO L470 AbstractCegarLoop]: Abstraction has 9321 states and 24425 transitions. [2022-03-01 17:10:11,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand 9321 states and 24425 transitions. [2022-03-01 17:10:11,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:11,107 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:11,107 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:11,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-03-01 17:10:11,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:11,307 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:11,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:11,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1071762469, now seen corresponding path program 39 times [2022-03-01 17:10:11,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:11,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363654767] [2022-03-01 17:10:11,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:11,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:11,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:11,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363654767] [2022-03-01 17:10:11,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363654767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:11,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635274660] [2022-03-01 17:10:11,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:10:11,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:11,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:11,407 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) [2022-03-01 17:10:11,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-01 17:10:11,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-01 17:10:11,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:11,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-01 17:10:11,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 24 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:10:12,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:15,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:10:15,327 INFO L353 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2022-03-01 17:10:15,328 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 37 [2022-03-01 17:10:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 38 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-01 17:10:15,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635274660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:15,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:15,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 22, 16] total 44 [2022-03-01 17:10:15,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797684377] [2022-03-01 17:10:15,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:15,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-01 17:10:15,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:15,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-01 17:10:15,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1559, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:10:15,391 INFO L87 Difference]: Start difference. First operand 9321 states and 24425 transitions. Second operand has 45 states, 45 states have (on average 2.6) internal successors, (117), 44 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:20,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:20,965 INFO L93 Difference]: Finished difference Result 29076 states and 75743 transitions. [2022-03-01 17:10:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-03-01 17:10:20,966 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6) internal successors, (117), 44 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:21,061 INFO L225 Difference]: With dead ends: 29076 [2022-03-01 17:10:21,061 INFO L226 Difference]: Without dead ends: 29064 [2022-03-01 17:10:21,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 132 SyntacticMatches, 61 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13174 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4567, Invalid=20873, Unknown=0, NotChecked=0, Total=25440 [2022-03-01 17:10:21,062 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 339 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2863 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:21,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 94 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 451 Invalid, 0 Unknown, 2863 Unchecked, 0.2s Time] [2022-03-01 17:10:21,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29064 states. [2022-03-01 17:10:21,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29064 to 20521. [2022-03-01 17:10:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20521 states, 20520 states have (on average 2.619103313840156) internal successors, (53744), 20520 states have internal predecessors, (53744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20521 states to 20521 states and 53744 transitions. [2022-03-01 17:10:21,443 INFO L78 Accepts]: Start accepts. Automaton has 20521 states and 53744 transitions. Word has length 47 [2022-03-01 17:10:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:21,443 INFO L470 AbstractCegarLoop]: Abstraction has 20521 states and 53744 transitions. [2022-03-01 17:10:21,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.6) internal successors, (117), 44 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 20521 states and 53744 transitions. [2022-03-01 17:10:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:21,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:21,462 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:21,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-03-01 17:10:21,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:21,663 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:21,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:21,663 INFO L85 PathProgramCache]: Analyzing trace with hash 428570523, now seen corresponding path program 68 times [2022-03-01 17:10:21,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:21,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994735604] [2022-03-01 17:10:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:21,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:21,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:21,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994735604] [2022-03-01 17:10:21,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994735604] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:21,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855717075] [2022-03-01 17:10:21,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:10:21,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:21,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:21,747 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) [2022-03-01 17:10:21,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-01 17:10:21,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:10:21,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:21,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:21,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:21,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:21,913 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:10:21,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:10:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:22,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855717075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:22,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:22,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-03-01 17:10:22,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703854887] [2022-03-01 17:10:22,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:22,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:10:22,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:10:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:10:22,017 INFO L87 Difference]: Start difference. First operand 20521 states and 53744 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:22,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:22,525 INFO L93 Difference]: Finished difference Result 21402 states and 55478 transitions. [2022-03-01 17:10:22,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:10:22,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:22,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:22,556 INFO L225 Difference]: With dead ends: 21402 [2022-03-01 17:10:22,556 INFO L226 Difference]: Without dead ends: 21334 [2022-03-01 17:10:22,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:10:22,556 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 96 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:22,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 373 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:10:22,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21334 states. [2022-03-01 17:10:22,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21334 to 20578. [2022-03-01 17:10:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20578 states, 20577 states have (on average 2.6089809010059777) internal successors, (53685), 20577 states have internal predecessors, (53685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20578 states to 20578 states and 53685 transitions. [2022-03-01 17:10:22,913 INFO L78 Accepts]: Start accepts. Automaton has 20578 states and 53685 transitions. Word has length 47 [2022-03-01 17:10:22,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:22,913 INFO L470 AbstractCegarLoop]: Abstraction has 20578 states and 53685 transitions. [2022-03-01 17:10:22,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:22,913 INFO L276 IsEmpty]: Start isEmpty. Operand 20578 states and 53685 transitions. [2022-03-01 17:10:22,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:22,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:22,932 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:22,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-03-01 17:10:23,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:23,132 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:23,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:23,133 INFO L85 PathProgramCache]: Analyzing trace with hash -184965657, now seen corresponding path program 69 times [2022-03-01 17:10:23,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:23,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113012516] [2022-03-01 17:10:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:23,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:10:23,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:23,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113012516] [2022-03-01 17:10:23,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113012516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:23,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065347425] [2022-03-01 17:10:23,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:10:23,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:23,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:23,227 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) [2022-03-01 17:10:23,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-01 17:10:23,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-01 17:10:23,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:23,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:23,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:10:23,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:23,390 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:10:23,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:10:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:10:23,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065347425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:23,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:23,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:10:23,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981457968] [2022-03-01 17:10:23,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:23,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:10:23,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:23,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:10:23,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:10:23,494 INFO L87 Difference]: Start difference. First operand 20578 states and 53685 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:23,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:23,925 INFO L93 Difference]: Finished difference Result 22274 states and 57228 transitions. [2022-03-01 17:10:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:10:23,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:23,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:23,961 INFO L225 Difference]: With dead ends: 22274 [2022-03-01 17:10:23,961 INFO L226 Difference]: Without dead ends: 22226 [2022-03-01 17:10:23,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:10:23,962 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 140 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:23,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 323 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:10:23,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22226 states. [2022-03-01 17:10:24,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22226 to 20541. [2022-03-01 17:10:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20541 states, 20540 states have (on average 2.6070107108081793) internal successors, (53548), 20540 states have internal predecessors, (53548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20541 states to 20541 states and 53548 transitions. [2022-03-01 17:10:24,338 INFO L78 Accepts]: Start accepts. Automaton has 20541 states and 53548 transitions. Word has length 47 [2022-03-01 17:10:24,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:24,338 INFO L470 AbstractCegarLoop]: Abstraction has 20541 states and 53548 transitions. [2022-03-01 17:10:24,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 20541 states and 53548 transitions. [2022-03-01 17:10:24,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:24,360 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:24,360 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:24,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-03-01 17:10:24,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-03-01 17:10:24,568 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:24,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1833323160, now seen corresponding path program 70 times [2022-03-01 17:10:24,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:24,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653224889] [2022-03-01 17:10:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:24,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 23 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:24,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:24,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653224889] [2022-03-01 17:10:24,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653224889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:24,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142611486] [2022-03-01 17:10:24,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:10:24,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:24,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:24,648 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) [2022-03-01 17:10:24,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-01 17:10:24,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:10:24,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:24,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 17:10:24,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:24,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:25,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142611486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:25,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:25,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2022-03-01 17:10:25,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347077415] [2022-03-01 17:10:25,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:25,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:10:25,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:25,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:10:25,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:10:25,071 INFO L87 Difference]: Start difference. First operand 20541 states and 53548 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 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) [2022-03-01 17:10:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:25,372 INFO L93 Difference]: Finished difference Result 24380 states and 63412 transitions. [2022-03-01 17:10:25,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:10:25,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 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 47 [2022-03-01 17:10:25,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:25,412 INFO L225 Difference]: With dead ends: 24380 [2022-03-01 17:10:25,412 INFO L226 Difference]: Without dead ends: 24296 [2022-03-01 17:10:25,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:10:25,412 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 182 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:25,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 157 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:10:25,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24296 states. [2022-03-01 17:10:25,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24296 to 22505. [2022-03-01 17:10:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22505 states, 22504 states have (on average 2.6204674724493424) internal successors, (58971), 22504 states have internal predecessors, (58971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:25,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22505 states to 22505 states and 58971 transitions. [2022-03-01 17:10:25,950 INFO L78 Accepts]: Start accepts. Automaton has 22505 states and 58971 transitions. Word has length 47 [2022-03-01 17:10:25,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:25,950 INFO L470 AbstractCegarLoop]: Abstraction has 22505 states and 58971 transitions. [2022-03-01 17:10:25,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 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) [2022-03-01 17:10:25,950 INFO L276 IsEmpty]: Start isEmpty. Operand 22505 states and 58971 transitions. [2022-03-01 17:10:25,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:25,970 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:25,970 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:25,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-03-01 17:10:26,191 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,SelfDestructingSolverStorable156 [2022-03-01 17:10:26,192 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:26,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:26,192 INFO L85 PathProgramCache]: Analyzing trace with hash -309643651, now seen corresponding path program 71 times [2022-03-01 17:10:26,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:26,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412394906] [2022-03-01 17:10:26,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:26,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:26,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:26,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412394906] [2022-03-01 17:10:26,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412394906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:26,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117735498] [2022-03-01 17:10:26,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:10:26,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:26,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:26,368 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) [2022-03-01 17:10:26,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-01 17:10:26,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-01 17:10:26,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:26,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:26,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:26,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:26,568 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:10:26,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:10:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:26,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117735498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:26,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:26,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-01 17:10:26,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911101436] [2022-03-01 17:10:26,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:26,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:10:26,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:26,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:10:26,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:10:26,679 INFO L87 Difference]: Start difference. First operand 22505 states and 58971 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:27,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:27,279 INFO L93 Difference]: Finished difference Result 25523 states and 65523 transitions. [2022-03-01 17:10:27,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:10:27,279 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:27,326 INFO L225 Difference]: With dead ends: 25523 [2022-03-01 17:10:27,326 INFO L226 Difference]: Without dead ends: 25481 [2022-03-01 17:10:27,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:10:27,327 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 220 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:27,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 436 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:10:27,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25481 states. [2022-03-01 17:10:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25481 to 22399. [2022-03-01 17:10:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22399 states, 22398 states have (on average 2.616974729886597) internal successors, (58615), 22398 states have internal predecessors, (58615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:27,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22399 states to 22399 states and 58615 transitions. [2022-03-01 17:10:27,758 INFO L78 Accepts]: Start accepts. Automaton has 22399 states and 58615 transitions. Word has length 47 [2022-03-01 17:10:27,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:27,759 INFO L470 AbstractCegarLoop]: Abstraction has 22399 states and 58615 transitions. [2022-03-01 17:10:27,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:27,759 INFO L276 IsEmpty]: Start isEmpty. Operand 22399 states and 58615 transitions. [2022-03-01 17:10:27,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:27,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:27,777 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:27,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-03-01 17:10:27,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-01 17:10:27,977 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:27,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:27,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2111788211, now seen corresponding path program 72 times [2022-03-01 17:10:27,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:27,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346947815] [2022-03-01 17:10:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:27,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:28,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:28,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346947815] [2022-03-01 17:10:28,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346947815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:28,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870150772] [2022-03-01 17:10:28,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:10:28,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:28,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:28,072 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) [2022-03-01 17:10:28,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-01 17:10:28,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-01 17:10:28,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:28,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:28,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:28,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:28,251 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:10:28,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:10:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:28,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870150772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:28,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:28,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-03-01 17:10:28,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343912875] [2022-03-01 17:10:28,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:28,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:10:28,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:28,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:10:28,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:10:28,344 INFO L87 Difference]: Start difference. First operand 22399 states and 58615 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:28,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:28,914 INFO L93 Difference]: Finished difference Result 25240 states and 64837 transitions. [2022-03-01 17:10:28,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:10:28,914 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:28,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:28,957 INFO L225 Difference]: With dead ends: 25240 [2022-03-01 17:10:28,957 INFO L226 Difference]: Without dead ends: 25180 [2022-03-01 17:10:28,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 86 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:10:28,957 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 183 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:28,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 406 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:10:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25180 states. [2022-03-01 17:10:29,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25180 to 22581. [2022-03-01 17:10:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22581 states, 22580 states have (on average 2.6141718334809565) internal successors, (59028), 22580 states have internal predecessors, (59028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22581 states to 22581 states and 59028 transitions. [2022-03-01 17:10:29,493 INFO L78 Accepts]: Start accepts. Automaton has 22581 states and 59028 transitions. Word has length 47 [2022-03-01 17:10:29,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:29,493 INFO L470 AbstractCegarLoop]: Abstraction has 22581 states and 59028 transitions. [2022-03-01 17:10:29,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:29,493 INFO L276 IsEmpty]: Start isEmpty. Operand 22581 states and 59028 transitions. [2022-03-01 17:10:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:29,511 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:29,511 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:29,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-03-01 17:10:29,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-01 17:10:29,711 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:29,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:29,711 INFO L85 PathProgramCache]: Analyzing trace with hash -2075721336, now seen corresponding path program 40 times [2022-03-01 17:10:29,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:29,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601077610] [2022-03-01 17:10:29,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:29,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:10:29,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:29,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601077610] [2022-03-01 17:10:29,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601077610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:29,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807988492] [2022-03-01 17:10:29,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:10:29,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:29,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:29,835 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) [2022-03-01 17:10:29,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-01 17:10:29,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:10:29,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:29,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 17:10:29,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:10:30,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:10:30,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807988492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:30,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:30,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 16 [2022-03-01 17:10:30,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013683941] [2022-03-01 17:10:30,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:30,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:10:30,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:30,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:10:30,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:10:30,252 INFO L87 Difference]: Start difference. First operand 22581 states and 59028 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 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) [2022-03-01 17:10:30,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:30,716 INFO L93 Difference]: Finished difference Result 26295 states and 67598 transitions. [2022-03-01 17:10:30,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:10:30,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 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 47 [2022-03-01 17:10:30,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:30,760 INFO L225 Difference]: With dead ends: 26295 [2022-03-01 17:10:30,760 INFO L226 Difference]: Without dead ends: 26295 [2022-03-01 17:10:30,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:10:30,761 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 356 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:30,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 173 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:10:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26295 states. [2022-03-01 17:10:31,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26295 to 23107. [2022-03-01 17:10:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23107 states, 23106 states have (on average 2.618583917597161) internal successors, (60505), 23106 states have internal predecessors, (60505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:31,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23107 states to 23107 states and 60505 transitions. [2022-03-01 17:10:31,275 INFO L78 Accepts]: Start accepts. Automaton has 23107 states and 60505 transitions. Word has length 47 [2022-03-01 17:10:31,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:31,275 INFO L470 AbstractCegarLoop]: Abstraction has 23107 states and 60505 transitions. [2022-03-01 17:10:31,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 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) [2022-03-01 17:10:31,275 INFO L276 IsEmpty]: Start isEmpty. Operand 23107 states and 60505 transitions. [2022-03-01 17:10:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:31,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:31,295 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:31,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-03-01 17:10:31,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-03-01 17:10:31,495 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:31,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1796576408, now seen corresponding path program 73 times [2022-03-01 17:10:31,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:31,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394188727] [2022-03-01 17:10:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:31,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:10:31,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:31,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394188727] [2022-03-01 17:10:31,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394188727] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:31,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442429466] [2022-03-01 17:10:31,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:10:31,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:31,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:31,689 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) [2022-03-01 17:10:31,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-01 17:10:31,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:31,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 17:10:31,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:31,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:32,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442429466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:32,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:32,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 14 [2022-03-01 17:10:32,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689582441] [2022-03-01 17:10:32,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:32,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:10:32,064 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:32,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:10:32,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:10:32,064 INFO L87 Difference]: Start difference. First operand 23107 states and 60505 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 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) [2022-03-01 17:10:32,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:32,380 INFO L93 Difference]: Finished difference Result 24544 states and 63385 transitions. [2022-03-01 17:10:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:10:32,380 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 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 47 [2022-03-01 17:10:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:32,420 INFO L225 Difference]: With dead ends: 24544 [2022-03-01 17:10:32,420 INFO L226 Difference]: Without dead ends: 24457 [2022-03-01 17:10:32,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:10:32,420 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 201 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:32,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 137 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:10:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24457 states. [2022-03-01 17:10:32,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24457 to 23077. [2022-03-01 17:10:32,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23077 states, 23076 states have (on average 2.612237822846247) internal successors, (60280), 23076 states have internal predecessors, (60280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:32,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23077 states to 23077 states and 60280 transitions. [2022-03-01 17:10:32,889 INFO L78 Accepts]: Start accepts. Automaton has 23077 states and 60280 transitions. Word has length 47 [2022-03-01 17:10:32,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:32,890 INFO L470 AbstractCegarLoop]: Abstraction has 23077 states and 60280 transitions. [2022-03-01 17:10:32,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 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) [2022-03-01 17:10:32,890 INFO L276 IsEmpty]: Start isEmpty. Operand 23077 states and 60280 transitions. [2022-03-01 17:10:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:32,908 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:32,908 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:32,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-03-01 17:10:33,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:33,108 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:33,109 INFO L85 PathProgramCache]: Analyzing trace with hash 303161907, now seen corresponding path program 41 times [2022-03-01 17:10:33,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:33,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387794236] [2022-03-01 17:10:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:33,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:10:33,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:33,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387794236] [2022-03-01 17:10:33,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387794236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:33,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992197719] [2022-03-01 17:10:33,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:10:33,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:33,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:33,196 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) [2022-03-01 17:10:33,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-01 17:10:33,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-01 17:10:33,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:33,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:33,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:10:33,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:33,363 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:10:33,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:10:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:10:33,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992197719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:33,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:33,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:10:33,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906097614] [2022-03-01 17:10:33,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:33,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:10:33,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:33,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:10:33,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:10:33,469 INFO L87 Difference]: Start difference. First operand 23077 states and 60280 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:33,818 INFO L93 Difference]: Finished difference Result 24261 states and 62845 transitions. [2022-03-01 17:10:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:10:33,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:33,860 INFO L225 Difference]: With dead ends: 24261 [2022-03-01 17:10:33,860 INFO L226 Difference]: Without dead ends: 24257 [2022-03-01 17:10:33,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:10:33,860 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 103 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:33,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 297 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:10:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24257 states. [2022-03-01 17:10:34,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24257 to 23090. [2022-03-01 17:10:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23090 states, 23089 states have (on average 2.6126293906189093) internal successors, (60323), 23089 states have internal predecessors, (60323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:34,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23090 states to 23090 states and 60323 transitions. [2022-03-01 17:10:34,419 INFO L78 Accepts]: Start accepts. Automaton has 23090 states and 60323 transitions. Word has length 47 [2022-03-01 17:10:34,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:34,419 INFO L470 AbstractCegarLoop]: Abstraction has 23090 states and 60323 transitions. [2022-03-01 17:10:34,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 23090 states and 60323 transitions. [2022-03-01 17:10:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:34,437 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:34,437 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:34,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-01 17:10:34,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:34,637 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:34,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:34,638 INFO L85 PathProgramCache]: Analyzing trace with hash 62826139, now seen corresponding path program 42 times [2022-03-01 17:10:34,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:34,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031782872] [2022-03-01 17:10:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:34,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:34,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:34,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031782872] [2022-03-01 17:10:34,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031782872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:34,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318877609] [2022-03-01 17:10:34,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:10:34,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:34,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:34,729 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) [2022-03-01 17:10:34,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-01 17:10:34,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-01 17:10:34,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:34,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:34,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:34,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:34,901 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:10:34,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:10:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:35,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318877609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:35,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:35,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:10:35,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693598191] [2022-03-01 17:10:35,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:35,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:10:35,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:35,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:10:35,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:10:35,010 INFO L87 Difference]: Start difference. First operand 23090 states and 60323 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:35,448 INFO L93 Difference]: Finished difference Result 24581 states and 63575 transitions. [2022-03-01 17:10:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:10:35,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:35,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:35,490 INFO L225 Difference]: With dead ends: 24581 [2022-03-01 17:10:35,490 INFO L226 Difference]: Without dead ends: 24554 [2022-03-01 17:10:35,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:10:35,491 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 146 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:35,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 353 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:10:35,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24554 states. [2022-03-01 17:10:35,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24554 to 23208. [2022-03-01 17:10:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23208 states, 23207 states have (on average 2.6111948980910933) internal successors, (60598), 23207 states have internal predecessors, (60598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:36,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23208 states to 23208 states and 60598 transitions. [2022-03-01 17:10:36,129 INFO L78 Accepts]: Start accepts. Automaton has 23208 states and 60598 transitions. Word has length 47 [2022-03-01 17:10:36,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:36,130 INFO L470 AbstractCegarLoop]: Abstraction has 23208 states and 60598 transitions. [2022-03-01 17:10:36,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:36,130 INFO L276 IsEmpty]: Start isEmpty. Operand 23208 states and 60598 transitions. [2022-03-01 17:10:36,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:36,152 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:36,152 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:36,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-03-01 17:10:36,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:36,352 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:36,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:36,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2109927755, now seen corresponding path program 74 times [2022-03-01 17:10:36,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:36,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438583392] [2022-03-01 17:10:36,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:36,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:36,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:36,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438583392] [2022-03-01 17:10:36,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438583392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:36,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683422940] [2022-03-01 17:10:36,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:10:36,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:36,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:36,448 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) [2022-03-01 17:10:36,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-01 17:10:36,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:10:36,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:36,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:36,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:36,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:36,626 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:10:36,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:10:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:36,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683422940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:36,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:36,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-03-01 17:10:36,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331607373] [2022-03-01 17:10:36,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:36,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:10:36,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:36,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:10:36,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:10:36,734 INFO L87 Difference]: Start difference. First operand 23208 states and 60598 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:37,286 INFO L93 Difference]: Finished difference Result 24015 states and 62171 transitions. [2022-03-01 17:10:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:10:37,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:37,320 INFO L225 Difference]: With dead ends: 24015 [2022-03-01 17:10:37,321 INFO L226 Difference]: Without dead ends: 23929 [2022-03-01 17:10:37,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:10:37,321 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 102 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:37,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 374 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:10:37,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23929 states. [2022-03-01 17:10:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23929 to 23114. [2022-03-01 17:10:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23114 states, 23113 states have (on average 2.6092675117899016) internal successors, (60308), 23113 states have internal predecessors, (60308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:37,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23114 states to 23114 states and 60308 transitions. [2022-03-01 17:10:37,749 INFO L78 Accepts]: Start accepts. Automaton has 23114 states and 60308 transitions. Word has length 47 [2022-03-01 17:10:37,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:37,749 INFO L470 AbstractCegarLoop]: Abstraction has 23114 states and 60308 transitions. [2022-03-01 17:10:37,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:37,749 INFO L276 IsEmpty]: Start isEmpty. Operand 23114 states and 60308 transitions. [2022-03-01 17:10:37,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:37,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:37,767 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:37,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-03-01 17:10:37,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:37,967 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:37,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:37,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1571503361, now seen corresponding path program 75 times [2022-03-01 17:10:37,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:37,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831138142] [2022-03-01 17:10:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:37,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:10:38,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:38,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831138142] [2022-03-01 17:10:38,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831138142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:38,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62718155] [2022-03-01 17:10:38,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:10:38,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:38,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:38,058 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) [2022-03-01 17:10:38,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-01 17:10:38,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-01 17:10:38,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:38,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:38,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:38,216 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:10:38,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:38,236 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:10:38,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:10:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:10:38,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62718155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:38,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:38,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:10:38,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667335265] [2022-03-01 17:10:38,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:38,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:10:38,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:10:38,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:10:38,339 INFO L87 Difference]: Start difference. First operand 23114 states and 60308 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:38,847 INFO L93 Difference]: Finished difference Result 24611 states and 63415 transitions. [2022-03-01 17:10:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:10:38,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:38,883 INFO L225 Difference]: With dead ends: 24611 [2022-03-01 17:10:38,884 INFO L226 Difference]: Without dead ends: 24551 [2022-03-01 17:10:38,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:10:38,884 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 138 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:38,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 389 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:10:38,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24551 states. [2022-03-01 17:10:39,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24551 to 23030. [2022-03-01 17:10:39,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23030 states, 23029 states have (on average 2.6088410265317643) internal successors, (60079), 23029 states have internal predecessors, (60079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:39,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23030 states to 23030 states and 60079 transitions. [2022-03-01 17:10:39,378 INFO L78 Accepts]: Start accepts. Automaton has 23030 states and 60079 transitions. Word has length 47 [2022-03-01 17:10:39,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:39,378 INFO L470 AbstractCegarLoop]: Abstraction has 23030 states and 60079 transitions. [2022-03-01 17:10:39,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 23030 states and 60079 transitions. [2022-03-01 17:10:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:39,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:39,398 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:39,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-03-01 17:10:39,598 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,SelfDestructingSolverStorable164 [2022-03-01 17:10:39,598 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:39,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:39,599 INFO L85 PathProgramCache]: Analyzing trace with hash -581546601, now seen corresponding path program 76 times [2022-03-01 17:10:39,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:39,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103441546] [2022-03-01 17:10:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:39,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:39,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:39,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103441546] [2022-03-01 17:10:39,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103441546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:39,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923879634] [2022-03-01 17:10:39,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:10:39,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:39,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:39,697 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) [2022-03-01 17:10:39,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-01 17:10:39,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:10:39,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:39,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:39,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:39,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:39,879 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:10:39,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:10:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:40,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923879634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:40,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:40,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-01 17:10:40,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977848150] [2022-03-01 17:10:40,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:40,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:10:40,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:40,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:10:40,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:10:40,078 INFO L87 Difference]: Start difference. First operand 23030 states and 60079 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:40,620 INFO L93 Difference]: Finished difference Result 26832 states and 68474 transitions. [2022-03-01 17:10:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:10:40,621 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:40,667 INFO L225 Difference]: With dead ends: 26832 [2022-03-01 17:10:40,667 INFO L226 Difference]: Without dead ends: 26778 [2022-03-01 17:10:40,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:10:40,667 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 252 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:40,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 474 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:10:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26778 states. [2022-03-01 17:10:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26778 to 23298. [2022-03-01 17:10:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23298 states, 23297 states have (on average 2.6057861527235264) internal successors, (60707), 23297 states have internal predecessors, (60707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:41,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23298 states to 23298 states and 60707 transitions. [2022-03-01 17:10:41,202 INFO L78 Accepts]: Start accepts. Automaton has 23298 states and 60707 transitions. Word has length 47 [2022-03-01 17:10:41,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:41,202 INFO L470 AbstractCegarLoop]: Abstraction has 23298 states and 60707 transitions. [2022-03-01 17:10:41,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:41,202 INFO L276 IsEmpty]: Start isEmpty. Operand 23298 states and 60707 transitions. [2022-03-01 17:10:41,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:41,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:41,221 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:41,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-03-01 17:10:41,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:41,421 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:41,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:41,422 INFO L85 PathProgramCache]: Analyzing trace with hash -426710067, now seen corresponding path program 77 times [2022-03-01 17:10:41,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:41,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259361633] [2022-03-01 17:10:41,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:41,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:41,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:41,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259361633] [2022-03-01 17:10:41,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259361633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:41,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068834776] [2022-03-01 17:10:41,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:10:41,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:41,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:41,514 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) [2022-03-01 17:10:41,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-01 17:10:41,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-01 17:10:41,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:41,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:41,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:41,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:41,691 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:10:41,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:10:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:41,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068834776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:41,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:41,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-03-01 17:10:41,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572211407] [2022-03-01 17:10:41,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:41,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:10:41,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:41,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:10:41,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:10:41,782 INFO L87 Difference]: Start difference. First operand 23298 states and 60707 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:42,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:42,472 INFO L93 Difference]: Finished difference Result 29848 states and 75292 transitions. [2022-03-01 17:10:42,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:10:42,473 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:42,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:42,526 INFO L225 Difference]: With dead ends: 29848 [2022-03-01 17:10:42,526 INFO L226 Difference]: Without dead ends: 29494 [2022-03-01 17:10:42,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 86 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:10:42,527 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 451 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:42,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 472 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:10:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29494 states. [2022-03-01 17:10:43,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29494 to 23163. [2022-03-01 17:10:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23163 states, 23162 states have (on average 2.6059062257145325) internal successors, (60358), 23162 states have internal predecessors, (60358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:43,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23163 states to 23163 states and 60358 transitions. [2022-03-01 17:10:43,149 INFO L78 Accepts]: Start accepts. Automaton has 23163 states and 60358 transitions. Word has length 47 [2022-03-01 17:10:43,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:43,149 INFO L470 AbstractCegarLoop]: Abstraction has 23163 states and 60358 transitions. [2022-03-01 17:10:43,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:43,149 INFO L276 IsEmpty]: Start isEmpty. Operand 23163 states and 60358 transitions. [2022-03-01 17:10:43,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:43,167 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:43,167 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:43,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-03-01 17:10:43,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:43,368 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:43,368 INFO L85 PathProgramCache]: Analyzing trace with hash -486401577, now seen corresponding path program 78 times [2022-03-01 17:10:43,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:43,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407980284] [2022-03-01 17:10:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:43,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:43,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:43,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407980284] [2022-03-01 17:10:43,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407980284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:43,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733591035] [2022-03-01 17:10:43,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:10:43,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:43,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:43,467 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) [2022-03-01 17:10:43,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-01 17:10:43,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-01 17:10:43,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:43,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:43,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:43,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:43,662 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:10:43,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:10:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:43,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733591035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:43,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:43,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-03-01 17:10:43,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428141941] [2022-03-01 17:10:43,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:43,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:10:43,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:43,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:10:43,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:10:43,757 INFO L87 Difference]: Start difference. First operand 23163 states and 60358 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:44,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:44,303 INFO L93 Difference]: Finished difference Result 27805 states and 70492 transitions. [2022-03-01 17:10:44,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:10:44,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:44,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:44,352 INFO L225 Difference]: With dead ends: 27805 [2022-03-01 17:10:44,352 INFO L226 Difference]: Without dead ends: 27427 [2022-03-01 17:10:44,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:10:44,352 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 252 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:44,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 415 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:10:44,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27427 states. [2022-03-01 17:10:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27427 to 22650. [2022-03-01 17:10:44,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22650 states, 22649 states have (on average 2.60660514813016) internal successors, (59037), 22649 states have internal predecessors, (59037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22650 states to 22650 states and 59037 transitions. [2022-03-01 17:10:44,947 INFO L78 Accepts]: Start accepts. Automaton has 22650 states and 59037 transitions. Word has length 47 [2022-03-01 17:10:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:44,947 INFO L470 AbstractCegarLoop]: Abstraction has 22650 states and 59037 transitions. [2022-03-01 17:10:44,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 22650 states and 59037 transitions. [2022-03-01 17:10:44,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:44,964 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:44,965 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:44,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-03-01 17:10:45,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-03-01 17:10:45,165 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:45,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:45,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1444774209, now seen corresponding path program 43 times [2022-03-01 17:10:45,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:45,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596449729] [2022-03-01 17:10:45,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:45,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:45,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:45,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596449729] [2022-03-01 17:10:45,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596449729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:45,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858872225] [2022-03-01 17:10:45,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:10:45,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:45,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:45,263 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) [2022-03-01 17:10:45,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-01 17:10:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:45,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:45,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:45,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:45,445 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:10:45,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:10:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:45,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858872225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:45,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:45,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:10:45,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278507727] [2022-03-01 17:10:45,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:45,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:10:45,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:45,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:10:45,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:10:45,559 INFO L87 Difference]: Start difference. First operand 22650 states and 59037 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:46,033 INFO L93 Difference]: Finished difference Result 23580 states and 61068 transitions. [2022-03-01 17:10:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:10:46,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:46,072 INFO L225 Difference]: With dead ends: 23580 [2022-03-01 17:10:46,072 INFO L226 Difference]: Without dead ends: 23576 [2022-03-01 17:10:46,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:10:46,072 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 103 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:46,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 305 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:10:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23576 states. [2022-03-01 17:10:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23576 to 22522. [2022-03-01 17:10:46,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22522 states, 22521 states have (on average 2.607166644465166) internal successors, (58716), 22521 states have internal predecessors, (58716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22522 states to 22522 states and 58716 transitions. [2022-03-01 17:10:46,536 INFO L78 Accepts]: Start accepts. Automaton has 22522 states and 58716 transitions. Word has length 47 [2022-03-01 17:10:46,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:46,536 INFO L470 AbstractCegarLoop]: Abstraction has 22522 states and 58716 transitions. [2022-03-01 17:10:46,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:46,536 INFO L276 IsEmpty]: Start isEmpty. Operand 22522 states and 58716 transitions. [2022-03-01 17:10:46,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:46,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:46,552 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:46,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-03-01 17:10:46,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-03-01 17:10:46,753 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:46,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1341515865, now seen corresponding path program 79 times [2022-03-01 17:10:46,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:46,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781150815] [2022-03-01 17:10:46,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:46,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:10:46,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:46,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781150815] [2022-03-01 17:10:46,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781150815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:46,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651586700] [2022-03-01 17:10:46,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:10:46,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:46,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:46,848 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) [2022-03-01 17:10:46,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-01 17:10:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:46,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:46,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:10:46,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:47,009 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:10:47,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:10:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:10:47,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651586700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:47,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:47,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:10:47,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460415269] [2022-03-01 17:10:47,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:47,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:10:47,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:47,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:10:47,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:10:47,114 INFO L87 Difference]: Start difference. First operand 22522 states and 58716 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:47,497 INFO L93 Difference]: Finished difference Result 23865 states and 61494 transitions. [2022-03-01 17:10:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:10:47,497 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:47,535 INFO L225 Difference]: With dead ends: 23865 [2022-03-01 17:10:47,535 INFO L226 Difference]: Without dead ends: 23811 [2022-03-01 17:10:47,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:10:47,536 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 149 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:47,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 359 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:10:47,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23811 states. [2022-03-01 17:10:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23811 to 22530. [2022-03-01 17:10:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22530 states, 22529 states have (on average 2.606906653646411) internal successors, (58731), 22529 states have internal predecessors, (58731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22530 states to 22530 states and 58731 transitions. [2022-03-01 17:10:48,121 INFO L78 Accepts]: Start accepts. Automaton has 22530 states and 58731 transitions. Word has length 47 [2022-03-01 17:10:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:48,121 INFO L470 AbstractCegarLoop]: Abstraction has 22530 states and 58731 transitions. [2022-03-01 17:10:48,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:48,121 INFO L276 IsEmpty]: Start isEmpty. Operand 22530 states and 58731 transitions. [2022-03-01 17:10:48,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:48,135 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:48,135 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:48,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-03-01 17:10:48,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-01 17:10:48,336 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:48,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:48,336 INFO L85 PathProgramCache]: Analyzing trace with hash 800401469, now seen corresponding path program 80 times [2022-03-01 17:10:48,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:48,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275829730] [2022-03-01 17:10:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:48,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:48,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:48,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275829730] [2022-03-01 17:10:48,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275829730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:48,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892283672] [2022-03-01 17:10:48,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:10:48,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:48,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:48,421 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) [2022-03-01 17:10:48,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-01 17:10:48,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:10:48,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:48,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:48,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:48,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:48,601 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:10:48,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:10:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:48,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892283672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:48,700 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:48,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-01 17:10:48,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270900610] [2022-03-01 17:10:48,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:48,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:10:48,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:48,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:10:48,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:10:48,701 INFO L87 Difference]: Start difference. First operand 22530 states and 58731 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:49,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:49,243 INFO L93 Difference]: Finished difference Result 25620 states and 65419 transitions. [2022-03-01 17:10:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:10:49,243 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:49,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:49,288 INFO L225 Difference]: With dead ends: 25620 [2022-03-01 17:10:49,288 INFO L226 Difference]: Without dead ends: 25566 [2022-03-01 17:10:49,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:10:49,289 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 268 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:49,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 477 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:10:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25566 states. [2022-03-01 17:10:49,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25566 to 22724. [2022-03-01 17:10:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22724 states, 22723 states have (on average 2.6042335959160323) internal successors, (59176), 22723 states have internal predecessors, (59176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22724 states to 22724 states and 59176 transitions. [2022-03-01 17:10:49,901 INFO L78 Accepts]: Start accepts. Automaton has 22724 states and 59176 transitions. Word has length 47 [2022-03-01 17:10:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:49,901 INFO L470 AbstractCegarLoop]: Abstraction has 22724 states and 59176 transitions. [2022-03-01 17:10:49,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:49,901 INFO L276 IsEmpty]: Start isEmpty. Operand 22724 states and 59176 transitions. [2022-03-01 17:10:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:49,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:49,916 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:49,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-03-01 17:10:50,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:50,118 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:50,118 INFO L85 PathProgramCache]: Analyzing trace with hash 955238003, now seen corresponding path program 81 times [2022-03-01 17:10:50,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:50,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766109650] [2022-03-01 17:10:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:50,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:50,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:50,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766109650] [2022-03-01 17:10:50,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766109650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:50,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549663425] [2022-03-01 17:10:50,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:10:50,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:50,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:50,211 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) [2022-03-01 17:10:50,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-01 17:10:50,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-01 17:10:50,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:50,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:50,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:50,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:50,387 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:10:50,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:10:50,476 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:50,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549663425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:50,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:50,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-03-01 17:10:50,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643680650] [2022-03-01 17:10:50,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:50,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:10:50,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:50,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:10:50,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:10:50,478 INFO L87 Difference]: Start difference. First operand 22724 states and 59176 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:51,324 INFO L93 Difference]: Finished difference Result 28648 states and 71941 transitions. [2022-03-01 17:10:51,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:10:51,325 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:51,365 INFO L225 Difference]: With dead ends: 28648 [2022-03-01 17:10:51,365 INFO L226 Difference]: Without dead ends: 28324 [2022-03-01 17:10:51,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 10 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:10:51,365 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 562 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:51,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 544 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:10:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28324 states. [2022-03-01 17:10:51,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28324 to 22394. [2022-03-01 17:10:51,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22394 states, 22393 states have (on average 2.603045594605457) internal successors, (58290), 22393 states have internal predecessors, (58290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:51,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22394 states to 22394 states and 58290 transitions. [2022-03-01 17:10:51,792 INFO L78 Accepts]: Start accepts. Automaton has 22394 states and 58290 transitions. Word has length 47 [2022-03-01 17:10:51,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:51,792 INFO L470 AbstractCegarLoop]: Abstraction has 22394 states and 58290 transitions. [2022-03-01 17:10:51,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:51,793 INFO L276 IsEmpty]: Start isEmpty. Operand 22394 states and 58290 transitions. [2022-03-01 17:10:51,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:51,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:51,810 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:51,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-03-01 17:10:52,011 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,SelfDestructingSolverStorable171 [2022-03-01 17:10:52,011 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:52,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:52,012 INFO L85 PathProgramCache]: Analyzing trace with hash 895546493, now seen corresponding path program 82 times [2022-03-01 17:10:52,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:52,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597476244] [2022-03-01 17:10:52,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:52,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:52,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:52,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597476244] [2022-03-01 17:10:52,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597476244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:52,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435907926] [2022-03-01 17:10:52,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:10:52,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:52,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:52,116 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) [2022-03-01 17:10:52,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-01 17:10:52,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:10:52,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:52,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:52,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:52,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:52,291 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:10:52,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:10:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:10:52,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435907926] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:52,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:52,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-03-01 17:10:52,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959240266] [2022-03-01 17:10:52,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:52,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:10:52,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:52,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:10:52,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:10:52,373 INFO L87 Difference]: Start difference. First operand 22394 states and 58290 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:53,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:53,576 INFO L93 Difference]: Finished difference Result 30483 states and 76275 transitions. [2022-03-01 17:10:53,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 17:10:53,576 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:53,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:53,624 INFO L225 Difference]: With dead ends: 30483 [2022-03-01 17:10:53,624 INFO L226 Difference]: Without dead ends: 30207 [2022-03-01 17:10:53,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=489, Invalid=3671, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 17:10:53,624 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 833 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:53,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 625 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:10:53,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30207 states. [2022-03-01 17:10:54,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30207 to 22650. [2022-03-01 17:10:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22650 states, 22649 states have (on average 2.6063402357719987) internal successors, (59031), 22649 states have internal predecessors, (59031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22650 states to 22650 states and 59031 transitions. [2022-03-01 17:10:54,140 INFO L78 Accepts]: Start accepts. Automaton has 22650 states and 59031 transitions. Word has length 47 [2022-03-01 17:10:54,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:54,140 INFO L470 AbstractCegarLoop]: Abstraction has 22650 states and 59031 transitions. [2022-03-01 17:10:54,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 22650 states and 59031 transitions. [2022-03-01 17:10:54,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:54,159 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:54,159 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:54,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-03-01 17:10:54,359 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,SelfDestructingSolverStorable172 [2022-03-01 17:10:54,359 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:54,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:54,360 INFO L85 PathProgramCache]: Analyzing trace with hash 742232627, now seen corresponding path program 83 times [2022-03-01 17:10:54,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:54,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558923324] [2022-03-01 17:10:54,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:54,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:54,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:54,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558923324] [2022-03-01 17:10:54,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558923324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:54,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095620574] [2022-03-01 17:10:54,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:10:54,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:54,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:54,490 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) [2022-03-01 17:10:54,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-01 17:10:54,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-01 17:10:54,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:54,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:10:54,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:54,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:54,667 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:10:54,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:10:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:54,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095620574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:54,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:54,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-03-01 17:10:54,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436739681] [2022-03-01 17:10:54,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:54,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:10:54,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:54,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:10:54,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:10:54,740 INFO L87 Difference]: Start difference. First operand 22650 states and 59031 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:55,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:55,415 INFO L93 Difference]: Finished difference Result 24813 states and 63452 transitions. [2022-03-01 17:10:55,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:10:55,415 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:10:55,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:55,453 INFO L225 Difference]: With dead ends: 24813 [2022-03-01 17:10:55,453 INFO L226 Difference]: Without dead ends: 24435 [2022-03-01 17:10:55,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:10:55,453 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 334 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:55,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 437 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:10:55,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24435 states. [2022-03-01 17:10:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24435 to 21611. [2022-03-01 17:10:55,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21611 states, 21610 states have (on average 2.6075890791300322) internal successors, (56350), 21610 states have internal predecessors, (56350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21611 states to 21611 states and 56350 transitions. [2022-03-01 17:10:55,864 INFO L78 Accepts]: Start accepts. Automaton has 21611 states and 56350 transitions. Word has length 47 [2022-03-01 17:10:55,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:55,864 INFO L470 AbstractCegarLoop]: Abstraction has 21611 states and 56350 transitions. [2022-03-01 17:10:55,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:55,864 INFO L276 IsEmpty]: Start isEmpty. Operand 21611 states and 56350 transitions. [2022-03-01 17:10:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:55,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:55,880 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:55,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-01 17:10:56,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:56,081 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:56,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:56,081 INFO L85 PathProgramCache]: Analyzing trace with hash -952663166, now seen corresponding path program 84 times [2022-03-01 17:10:56,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:56,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144691767] [2022-03-01 17:10:56,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:56,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:10:56,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:56,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144691767] [2022-03-01 17:10:56,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144691767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:56,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318343075] [2022-03-01 17:10:56,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:10:56,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:56,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:56,203 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) [2022-03-01 17:10:56,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-01 17:10:56,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-01 17:10:56,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:56,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 17:10:56,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:56,400 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:10:56,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:10:56,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318343075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:56,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:56,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 16 [2022-03-01 17:10:56,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242717877] [2022-03-01 17:10:56,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:56,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:10:56,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:56,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:10:56,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:10:56,756 INFO L87 Difference]: Start difference. First operand 21611 states and 56350 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 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) [2022-03-01 17:10:57,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:10:57,237 INFO L93 Difference]: Finished difference Result 24522 states and 63115 transitions. [2022-03-01 17:10:57,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:10:57,237 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 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 47 [2022-03-01 17:10:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:10:57,277 INFO L225 Difference]: With dead ends: 24522 [2022-03-01 17:10:57,277 INFO L226 Difference]: Without dead ends: 24522 [2022-03-01 17:10:57,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:10:57,277 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 243 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:10:57,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 198 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:10:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24522 states. [2022-03-01 17:10:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24522 to 20542. [2022-03-01 17:10:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20542 states, 20541 states have (on average 2.5769923567499147) internal successors, (52934), 20541 states have internal predecessors, (52934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:10:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20542 states to 20542 states and 52934 transitions. [2022-03-01 17:10:57,755 INFO L78 Accepts]: Start accepts. Automaton has 20542 states and 52934 transitions. Word has length 47 [2022-03-01 17:10:57,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:10:57,756 INFO L470 AbstractCegarLoop]: Abstraction has 20542 states and 52934 transitions. [2022-03-01 17:10:57,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 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) [2022-03-01 17:10:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 20542 states and 52934 transitions. [2022-03-01 17:10:57,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:10:57,772 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:10:57,772 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:10:57,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-03-01 17:10:57,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:57,972 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:10:57,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:10:57,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1422396085, now seen corresponding path program 44 times [2022-03-01 17:10:57,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:10:57,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003738990] [2022-03-01 17:10:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:10:57,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:10:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:10:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:10:58,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:10:58,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003738990] [2022-03-01 17:10:58,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003738990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:10:58,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120092186] [2022-03-01 17:10:58,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:10:58,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:10:58,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:10:58,079 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) [2022-03-01 17:10:58,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-01 17:10:58,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:10:58,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:10:58,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:10:58,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:10:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 29 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:58,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:10:59,115 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:10:59,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:10:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:10:59,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120092186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:10:59,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:10:59,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 34 [2022-03-01 17:10:59,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518937704] [2022-03-01 17:10:59,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:10:59,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:10:59,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:10:59,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:10:59,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:10:59,210 INFO L87 Difference]: Start difference. First operand 20542 states and 52934 transitions. Second operand has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:01,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:01,355 INFO L93 Difference]: Finished difference Result 36033 states and 87657 transitions. [2022-03-01 17:11:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-01 17:11:01,356 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:11:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:01,409 INFO L225 Difference]: With dead ends: 36033 [2022-03-01 17:11:01,409 INFO L226 Difference]: Without dead ends: 35888 [2022-03-01 17:11:01,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2951 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1043, Invalid=9463, Unknown=0, NotChecked=0, Total=10506 [2022-03-01 17:11:01,410 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 412 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:01,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 576 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1137 Invalid, 0 Unknown, 558 Unchecked, 0.4s Time] [2022-03-01 17:11:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35888 states. [2022-03-01 17:11:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35888 to 25172. [2022-03-01 17:11:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25172 states, 25171 states have (on average 2.5370068729887567) internal successors, (63859), 25171 states have internal predecessors, (63859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:01,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25172 states to 25172 states and 63859 transitions. [2022-03-01 17:11:01,944 INFO L78 Accepts]: Start accepts. Automaton has 25172 states and 63859 transitions. Word has length 47 [2022-03-01 17:11:01,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:01,944 INFO L470 AbstractCegarLoop]: Abstraction has 25172 states and 63859 transitions. [2022-03-01 17:11:01,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 25172 states and 63859 transitions. [2022-03-01 17:11:01,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:01,965 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:01,965 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:01,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-03-01 17:11:02,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:02,166 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:02,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:02,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1872969269, now seen corresponding path program 45 times [2022-03-01 17:11:02,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:02,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655417138] [2022-03-01 17:11:02,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:02,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:02,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:02,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655417138] [2022-03-01 17:11:02,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655417138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:02,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221839704] [2022-03-01 17:11:02,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:11:02,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:02,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:02,297 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) [2022-03-01 17:11:02,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-01 17:11:02,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-01 17:11:02,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:02,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:02,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:02,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:02,493 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:02,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:02,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221839704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:02,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:02,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-03-01 17:11:02,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526356442] [2022-03-01 17:11:02,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:02,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:11:02,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:02,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:11:02,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:11:02,558 INFO L87 Difference]: Start difference. First operand 25172 states and 63859 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:03,065 INFO L93 Difference]: Finished difference Result 30606 states and 77046 transitions. [2022-03-01 17:11:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:11:03,066 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:11:03,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:03,116 INFO L225 Difference]: With dead ends: 30606 [2022-03-01 17:11:03,116 INFO L226 Difference]: Without dead ends: 30562 [2022-03-01 17:11:03,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:11:03,117 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 149 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:03,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 258 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:11:03,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30562 states. [2022-03-01 17:11:03,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30562 to 24212. [2022-03-01 17:11:03,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24212 states, 24211 states have (on average 2.5319069844285655) internal successors, (61300), 24211 states have internal predecessors, (61300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24212 states to 24212 states and 61300 transitions. [2022-03-01 17:11:03,659 INFO L78 Accepts]: Start accepts. Automaton has 24212 states and 61300 transitions. Word has length 47 [2022-03-01 17:11:03,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:03,660 INFO L470 AbstractCegarLoop]: Abstraction has 24212 states and 61300 transitions. [2022-03-01 17:11:03,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:03,660 INFO L276 IsEmpty]: Start isEmpty. Operand 24212 states and 61300 transitions. [2022-03-01 17:11:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:03,679 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:03,679 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:03,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-03-01 17:11:03,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:03,880 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:03,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:03,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1859862027, now seen corresponding path program 85 times [2022-03-01 17:11:03,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:03,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516724675] [2022-03-01 17:11:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:03,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:03,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:03,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516724675] [2022-03-01 17:11:03,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516724675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:03,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449220079] [2022-03-01 17:11:03,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:11:03,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:03,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:03,981 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) [2022-03-01 17:11:03,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-01 17:11:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:04,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:04,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:04,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:04,253 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:04,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:04,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449220079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:04,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:04,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-03-01 17:11:04,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7930226] [2022-03-01 17:11:04,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:04,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:11:04,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:04,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:11:04,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:11:04,335 INFO L87 Difference]: Start difference. First operand 24212 states and 61300 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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) [2022-03-01 17:11:04,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:04,601 INFO L93 Difference]: Finished difference Result 24450 states and 61740 transitions. [2022-03-01 17:11:04,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:11:04,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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 47 [2022-03-01 17:11:04,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:04,639 INFO L225 Difference]: With dead ends: 24450 [2022-03-01 17:11:04,640 INFO L226 Difference]: Without dead ends: 24362 [2022-03-01 17:11:04,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:11:04,640 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:04,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 232 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 581 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-03-01 17:11:04,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24362 states. [2022-03-01 17:11:04,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24362 to 24227. [2022-03-01 17:11:05,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24227 states, 24226 states have (on average 2.530050359118303) internal successors, (61293), 24226 states have internal predecessors, (61293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24227 states to 24227 states and 61293 transitions. [2022-03-01 17:11:05,061 INFO L78 Accepts]: Start accepts. Automaton has 24227 states and 61293 transitions. Word has length 47 [2022-03-01 17:11:05,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:05,061 INFO L470 AbstractCegarLoop]: Abstraction has 24227 states and 61293 transitions. [2022-03-01 17:11:05,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 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) [2022-03-01 17:11:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand 24227 states and 61293 transitions. [2022-03-01 17:11:05,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:05,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:05,082 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:05,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-01 17:11:05,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-03-01 17:11:05,282 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:05,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:05,283 INFO L85 PathProgramCache]: Analyzing trace with hash 318376203, now seen corresponding path program 86 times [2022-03-01 17:11:05,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:05,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918603228] [2022-03-01 17:11:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:05,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:05,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:05,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918603228] [2022-03-01 17:11:05,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918603228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:05,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870748131] [2022-03-01 17:11:05,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:11:05,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:05,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:05,396 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) [2022-03-01 17:11:05,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-01 17:11:05,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:11:05,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:05,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:05,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:05,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:05,724 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:05,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:05,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870748131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:05,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:05,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:11:05,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641773998] [2022-03-01 17:11:05,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:05,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:11:05,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:05,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:11:05,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:11:05,805 INFO L87 Difference]: Start difference. First operand 24227 states and 61293 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2022-03-01 17:11:06,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:06,088 INFO L93 Difference]: Finished difference Result 24438 states and 61664 transitions. [2022-03-01 17:11:06,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:11:06,089 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 47 [2022-03-01 17:11:06,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:06,128 INFO L225 Difference]: With dead ends: 24438 [2022-03-01 17:11:06,128 INFO L226 Difference]: Without dead ends: 24374 [2022-03-01 17:11:06,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:11:06,128 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 48 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:06,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 328 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 609 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-03-01 17:11:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24374 states. [2022-03-01 17:11:06,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24374 to 24231. [2022-03-01 17:11:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24231 states, 24230 states have (on average 2.529880313660751) internal successors, (61299), 24230 states have internal predecessors, (61299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24231 states to 24231 states and 61299 transitions. [2022-03-01 17:11:06,757 INFO L78 Accepts]: Start accepts. Automaton has 24231 states and 61299 transitions. Word has length 47 [2022-03-01 17:11:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:06,758 INFO L470 AbstractCegarLoop]: Abstraction has 24231 states and 61299 transitions. [2022-03-01 17:11:06,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2022-03-01 17:11:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 24231 states and 61299 transitions. [2022-03-01 17:11:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:06,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:06,777 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:06,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-03-01 17:11:06,977 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,SelfDestructingSolverStorable178 [2022-03-01 17:11:06,977 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:06,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1216998795, now seen corresponding path program 87 times [2022-03-01 17:11:06,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:06,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638676507] [2022-03-01 17:11:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:06,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:07,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:07,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638676507] [2022-03-01 17:11:07,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638676507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:07,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898038626] [2022-03-01 17:11:07,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:11:07,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:07,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:07,091 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) [2022-03-01 17:11:07,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-01 17:11:07,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-01 17:11:07,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:07,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:07,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:07,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:07,403 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:07,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:07,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898038626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:07,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:07,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:11:07,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970281931] [2022-03-01 17:11:07,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:07,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:11:07,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:07,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:11:07,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:11:07,483 INFO L87 Difference]: Start difference. First operand 24231 states and 61299 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2022-03-01 17:11:07,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:07,729 INFO L93 Difference]: Finished difference Result 25093 states and 63013 transitions. [2022-03-01 17:11:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:11:07,729 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 47 [2022-03-01 17:11:07,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:07,770 INFO L225 Difference]: With dead ends: 25093 [2022-03-01 17:11:07,770 INFO L226 Difference]: Without dead ends: 25020 [2022-03-01 17:11:07,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:11:07,770 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:07,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 217 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 487 Invalid, 0 Unknown, 129 Unchecked, 0.2s Time] [2022-03-01 17:11:07,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25020 states. [2022-03-01 17:11:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25020 to 24687. [2022-03-01 17:11:08,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24687 states, 24686 states have (on average 2.5209025358502797) internal successors, (62231), 24686 states have internal predecessors, (62231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24687 states to 24687 states and 62231 transitions. [2022-03-01 17:11:08,249 INFO L78 Accepts]: Start accepts. Automaton has 24687 states and 62231 transitions. Word has length 47 [2022-03-01 17:11:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:08,249 INFO L470 AbstractCegarLoop]: Abstraction has 24687 states and 62231 transitions. [2022-03-01 17:11:08,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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) [2022-03-01 17:11:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 24687 states and 62231 transitions. [2022-03-01 17:11:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:08,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:08,270 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:08,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-03-01 17:11:08,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-01 17:11:08,470 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:08,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:08,471 INFO L85 PathProgramCache]: Analyzing trace with hash 859298519, now seen corresponding path program 46 times [2022-03-01 17:11:08,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:08,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474075020] [2022-03-01 17:11:08,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:08,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:08,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:08,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474075020] [2022-03-01 17:11:08,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474075020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:08,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091651098] [2022-03-01 17:11:08,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:11:08,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:08,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:08,578 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) [2022-03-01 17:11:08,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-01 17:11:08,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:11:08,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:08,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:08,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:08,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:08,752 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:08,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:08,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091651098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:08,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:08,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-03-01 17:11:08,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259719416] [2022-03-01 17:11:08,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:08,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:11:08,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:08,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:11:08,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:11:08,827 INFO L87 Difference]: Start difference. First operand 24687 states and 62231 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:09,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:09,401 INFO L93 Difference]: Finished difference Result 29039 states and 72501 transitions. [2022-03-01 17:11:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:11:09,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:11:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:09,454 INFO L225 Difference]: With dead ends: 29039 [2022-03-01 17:11:09,454 INFO L226 Difference]: Without dead ends: 28999 [2022-03-01 17:11:09,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:11:09,455 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 133 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:09,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 276 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:11:09,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28999 states. [2022-03-01 17:11:09,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28999 to 25054. [2022-03-01 17:11:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25054 states, 25053 states have (on average 2.518540693729294) internal successors, (63097), 25053 states have internal predecessors, (63097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:10,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25054 states to 25054 states and 63097 transitions. [2022-03-01 17:11:10,019 INFO L78 Accepts]: Start accepts. Automaton has 25054 states and 63097 transitions. Word has length 47 [2022-03-01 17:11:10,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:10,020 INFO L470 AbstractCegarLoop]: Abstraction has 25054 states and 63097 transitions. [2022-03-01 17:11:10,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:10,020 INFO L276 IsEmpty]: Start isEmpty. Operand 25054 states and 63097 transitions. [2022-03-01 17:11:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:10,041 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:10,041 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:10,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-03-01 17:11:10,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:10,241 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:10,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:10,242 INFO L85 PathProgramCache]: Analyzing trace with hash 636456791, now seen corresponding path program 88 times [2022-03-01 17:11:10,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:10,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697432941] [2022-03-01 17:11:10,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:10,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:10,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:10,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697432941] [2022-03-01 17:11:10,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697432941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:10,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094505124] [2022-03-01 17:11:10,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:11:10,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:10,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:10,360 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) [2022-03-01 17:11:10,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-01 17:11:10,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:11:10,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:10,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:10,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:10,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:10,591 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:10,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:10,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094505124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:10,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:10,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:11:10,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083818980] [2022-03-01 17:11:10,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:10,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:11:10,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:10,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:11:10,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:11:10,684 INFO L87 Difference]: Start difference. First operand 25054 states and 63097 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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) [2022-03-01 17:11:11,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:11,024 INFO L93 Difference]: Finished difference Result 25349 states and 63616 transitions. [2022-03-01 17:11:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:11:11,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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 47 [2022-03-01 17:11:11,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:11,066 INFO L225 Difference]: With dead ends: 25349 [2022-03-01 17:11:11,066 INFO L226 Difference]: Without dead ends: 25303 [2022-03-01 17:11:11,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:11:11,067 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 71 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:11,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 281 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 649 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-03-01 17:11:11,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25303 states. [2022-03-01 17:11:11,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25303 to 25027. [2022-03-01 17:11:11,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25027 states, 25026 states have (on average 2.516782546152002) internal successors, (62985), 25026 states have internal predecessors, (62985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25027 states to 25027 states and 62985 transitions. [2022-03-01 17:11:11,578 INFO L78 Accepts]: Start accepts. Automaton has 25027 states and 62985 transitions. Word has length 47 [2022-03-01 17:11:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:11,578 INFO L470 AbstractCegarLoop]: Abstraction has 25027 states and 62985 transitions. [2022-03-01 17:11:11,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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) [2022-03-01 17:11:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 25027 states and 62985 transitions. [2022-03-01 17:11:11,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:11,597 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:11,597 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:11,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-03-01 17:11:11,798 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,SelfDestructingSolverStorable181 [2022-03-01 17:11:11,798 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:11,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:11,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1365741569, now seen corresponding path program 89 times [2022-03-01 17:11:11,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:11,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825744664] [2022-03-01 17:11:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:11,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:11,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:11,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825744664] [2022-03-01 17:11:11,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825744664] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:11,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211755021] [2022-03-01 17:11:11,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:11:11,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:11,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:11,900 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) [2022-03-01 17:11:11,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-01 17:11:11,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-01 17:11:11,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:11,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:11,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:12,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:12,179 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:12,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:12,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211755021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:12,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:12,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-03-01 17:11:12,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022381577] [2022-03-01 17:11:12,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:12,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:11:12,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:12,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:11:12,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:11:12,269 INFO L87 Difference]: Start difference. First operand 25027 states and 62985 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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) [2022-03-01 17:11:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:12,597 INFO L93 Difference]: Finished difference Result 25981 states and 64908 transitions. [2022-03-01 17:11:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:11:12,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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 47 [2022-03-01 17:11:12,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:12,643 INFO L225 Difference]: With dead ends: 25981 [2022-03-01 17:11:12,643 INFO L226 Difference]: Without dead ends: 25918 [2022-03-01 17:11:12,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:11:12,643 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:12,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 147 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 402 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-03-01 17:11:12,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25918 states. [2022-03-01 17:11:13,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25918 to 25540. [2022-03-01 17:11:13,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25540 states, 25539 states have (on average 2.507772426484984) internal successors, (64046), 25539 states have internal predecessors, (64046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:13,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25540 states to 25540 states and 64046 transitions. [2022-03-01 17:11:13,292 INFO L78 Accepts]: Start accepts. Automaton has 25540 states and 64046 transitions. Word has length 47 [2022-03-01 17:11:13,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:13,292 INFO L470 AbstractCegarLoop]: Abstraction has 25540 states and 64046 transitions. [2022-03-01 17:11:13,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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) [2022-03-01 17:11:13,293 INFO L276 IsEmpty]: Start isEmpty. Operand 25540 states and 64046 transitions. [2022-03-01 17:11:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:13,312 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:13,312 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:13,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-03-01 17:11:13,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:13,513 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:13,513 INFO L85 PathProgramCache]: Analyzing trace with hash 637917488, now seen corresponding path program 47 times [2022-03-01 17:11:13,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:13,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350214415] [2022-03-01 17:11:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:13,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:11:13,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:13,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350214415] [2022-03-01 17:11:13,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350214415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:13,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115024440] [2022-03-01 17:11:13,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:11:13,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:13,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:13,611 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) [2022-03-01 17:11:13,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-01 17:11:13,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 17:11:13,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:13,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 17:11:13,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:13,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:13,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115024440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:13,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:13,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 18 [2022-03-01 17:11:13,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129320071] [2022-03-01 17:11:13,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:13,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:11:13,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:13,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:11:13,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:11:13,945 INFO L87 Difference]: Start difference. First operand 25540 states and 64046 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:14,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:14,335 INFO L93 Difference]: Finished difference Result 27576 states and 68304 transitions. [2022-03-01 17:11:14,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:11:14,336 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:11:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:14,382 INFO L225 Difference]: With dead ends: 27576 [2022-03-01 17:11:14,382 INFO L226 Difference]: Without dead ends: 27506 [2022-03-01 17:11:14,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:11:14,383 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 256 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:14,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 259 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:11:14,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27506 states. [2022-03-01 17:11:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27506 to 22339. [2022-03-01 17:11:14,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22339 states, 22338 states have (on average 2.509938221864088) internal successors, (56067), 22338 states have internal predecessors, (56067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22339 states to 22339 states and 56067 transitions. [2022-03-01 17:11:14,970 INFO L78 Accepts]: Start accepts. Automaton has 22339 states and 56067 transitions. Word has length 47 [2022-03-01 17:11:14,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:14,970 INFO L470 AbstractCegarLoop]: Abstraction has 22339 states and 56067 transitions. [2022-03-01 17:11:14,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:14,970 INFO L276 IsEmpty]: Start isEmpty. Operand 22339 states and 56067 transitions. [2022-03-01 17:11:14,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:14,988 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:14,988 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:15,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-03-01 17:11:15,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:15,189 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:15,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:15,189 INFO L85 PathProgramCache]: Analyzing trace with hash -820758385, now seen corresponding path program 90 times [2022-03-01 17:11:15,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:15,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066466573] [2022-03-01 17:11:15,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:15,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:15,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:15,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066466573] [2022-03-01 17:11:15,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066466573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:15,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703714522] [2022-03-01 17:11:15,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:11:15,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:15,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:15,298 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) [2022-03-01 17:11:15,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-01 17:11:15,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-01 17:11:15,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:15,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:15,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:15,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:15,578 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:15,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:15,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703714522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:15,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:15,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-03-01 17:11:15,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646854816] [2022-03-01 17:11:15,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:15,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:11:15,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:15,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:11:15,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:11:15,670 INFO L87 Difference]: Start difference. First operand 22339 states and 56067 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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) [2022-03-01 17:11:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:15,943 INFO L93 Difference]: Finished difference Result 22625 states and 56599 transitions. [2022-03-01 17:11:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:11:15,943 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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 47 [2022-03-01 17:11:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:15,983 INFO L225 Difference]: With dead ends: 22625 [2022-03-01 17:11:15,983 INFO L226 Difference]: Without dead ends: 22549 [2022-03-01 17:11:15,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:11:15,983 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:15,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 298 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 556 Invalid, 0 Unknown, 211 Unchecked, 0.2s Time] [2022-03-01 17:11:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22549 states. [2022-03-01 17:11:16,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22549 to 22046. [2022-03-01 17:11:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22046 states, 22045 states have (on average 2.5153095940122476) internal successors, (55450), 22045 states have internal predecessors, (55450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22046 states to 22046 states and 55450 transitions. [2022-03-01 17:11:16,427 INFO L78 Accepts]: Start accepts. Automaton has 22046 states and 55450 transitions. Word has length 47 [2022-03-01 17:11:16,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:16,427 INFO L470 AbstractCegarLoop]: Abstraction has 22046 states and 55450 transitions. [2022-03-01 17:11:16,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 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) [2022-03-01 17:11:16,428 INFO L276 IsEmpty]: Start isEmpty. Operand 22046 states and 55450 transitions. [2022-03-01 17:11:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:16,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:16,447 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:16,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-03-01 17:11:16,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:16,648 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:16,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:16,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2072068990, now seen corresponding path program 91 times [2022-03-01 17:11:16,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:16,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682625538] [2022-03-01 17:11:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:16,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:11:16,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:16,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682625538] [2022-03-01 17:11:16,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682625538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:16,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470374850] [2022-03-01 17:11:16,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:11:16,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:16,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:16,747 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) [2022-03-01 17:11:16,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-01 17:11:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:16,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-01 17:11:16,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:16,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:17,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470374850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:17,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:17,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 14 [2022-03-01 17:11:17,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919601731] [2022-03-01 17:11:17,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:17,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:11:17,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:17,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:11:17,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:11:17,260 INFO L87 Difference]: Start difference. First operand 22046 states and 55450 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 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) [2022-03-01 17:11:17,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:17,672 INFO L93 Difference]: Finished difference Result 25738 states and 64444 transitions. [2022-03-01 17:11:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:11:17,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 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 47 [2022-03-01 17:11:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:17,717 INFO L225 Difference]: With dead ends: 25738 [2022-03-01 17:11:17,717 INFO L226 Difference]: Without dead ends: 25738 [2022-03-01 17:11:17,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:11:17,718 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 254 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:17,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 155 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:11:17,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25738 states. [2022-03-01 17:11:18,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25738 to 22895. [2022-03-01 17:11:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22895 states, 22894 states have (on average 2.523761684284092) internal successors, (57779), 22894 states have internal predecessors, (57779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22895 states to 22895 states and 57779 transitions. [2022-03-01 17:11:18,256 INFO L78 Accepts]: Start accepts. Automaton has 22895 states and 57779 transitions. Word has length 47 [2022-03-01 17:11:18,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:18,256 INFO L470 AbstractCegarLoop]: Abstraction has 22895 states and 57779 transitions. [2022-03-01 17:11:18,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 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) [2022-03-01 17:11:18,256 INFO L276 IsEmpty]: Start isEmpty. Operand 22895 states and 57779 transitions. [2022-03-01 17:11:18,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:18,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:18,275 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:18,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-03-01 17:11:18,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:18,475 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:18,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1429418507, now seen corresponding path program 48 times [2022-03-01 17:11:18,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:18,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9623697] [2022-03-01 17:11:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:18,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:18,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:18,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9623697] [2022-03-01 17:11:18,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9623697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:18,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430502470] [2022-03-01 17:11:18,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:11:18,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:18,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:18,569 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) [2022-03-01 17:11:18,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-01 17:11:18,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-01 17:11:18,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:18,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:18,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:18,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:18,743 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:18,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:18,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430502470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:18,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:18,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-03-01 17:11:18,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898576298] [2022-03-01 17:11:18,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:18,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:11:18,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:18,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:11:18,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:11:18,826 INFO L87 Difference]: Start difference. First operand 22895 states and 57779 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:19,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:19,264 INFO L93 Difference]: Finished difference Result 26122 states and 65290 transitions. [2022-03-01 17:11:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:11:19,264 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:11:19,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:19,311 INFO L225 Difference]: With dead ends: 26122 [2022-03-01 17:11:19,311 INFO L226 Difference]: Without dead ends: 26108 [2022-03-01 17:11:19,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 86 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:11:19,311 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 118 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:19,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 298 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:11:19,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26108 states. [2022-03-01 17:11:19,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26108 to 23114. [2022-03-01 17:11:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23114 states, 23113 states have (on average 2.523904296283477) internal successors, (58335), 23113 states have internal predecessors, (58335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:19,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23114 states to 23114 states and 58335 transitions. [2022-03-01 17:11:19,798 INFO L78 Accepts]: Start accepts. Automaton has 23114 states and 58335 transitions. Word has length 47 [2022-03-01 17:11:19,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:19,798 INFO L470 AbstractCegarLoop]: Abstraction has 23114 states and 58335 transitions. [2022-03-01 17:11:19,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:19,798 INFO L276 IsEmpty]: Start isEmpty. Operand 23114 states and 58335 transitions. [2022-03-01 17:11:19,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:19,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:19,818 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:19,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-03-01 17:11:20,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:20,019 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:20,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:20,019 INFO L85 PathProgramCache]: Analyzing trace with hash -539861813, now seen corresponding path program 92 times [2022-03-01 17:11:20,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:20,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315842521] [2022-03-01 17:11:20,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:20,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:20,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:20,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315842521] [2022-03-01 17:11:20,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315842521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:20,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472096708] [2022-03-01 17:11:20,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:11:20,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:20,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:20,114 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) [2022-03-01 17:11:20,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-01 17:11:20,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:11:20,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:20,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:20,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:20,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:20,341 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:20,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:20,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472096708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:20,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:20,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:11:20,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295464970] [2022-03-01 17:11:20,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:20,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:11:20,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:20,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:11:20,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:11:20,441 INFO L87 Difference]: Start difference. First operand 23114 states and 58335 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:20,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:20,632 INFO L93 Difference]: Finished difference Result 23457 states and 59021 transitions. [2022-03-01 17:11:20,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:11:20,633 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:11:20,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:20,674 INFO L225 Difference]: With dead ends: 23457 [2022-03-01 17:11:20,674 INFO L226 Difference]: Without dead ends: 23418 [2022-03-01 17:11:20,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:11:20,674 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:20,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 113 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 321 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2022-03-01 17:11:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23418 states. [2022-03-01 17:11:21,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23418 to 23198. [2022-03-01 17:11:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23198 states, 23197 states have (on average 2.5225244643703926) internal successors, (58515), 23197 states have internal predecessors, (58515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:21,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23198 states to 23198 states and 58515 transitions. [2022-03-01 17:11:21,162 INFO L78 Accepts]: Start accepts. Automaton has 23198 states and 58515 transitions. Word has length 47 [2022-03-01 17:11:21,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:21,162 INFO L470 AbstractCegarLoop]: Abstraction has 23198 states and 58515 transitions. [2022-03-01 17:11:21,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 23198 states and 58515 transitions. [2022-03-01 17:11:21,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:21,181 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:21,181 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:21,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-03-01 17:11:21,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:21,382 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:21,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:21,382 INFO L85 PathProgramCache]: Analyzing trace with hash -858005609, now seen corresponding path program 49 times [2022-03-01 17:11:21,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:21,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15607283] [2022-03-01 17:11:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:21,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:21,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:21,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15607283] [2022-03-01 17:11:21,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15607283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:21,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534777002] [2022-03-01 17:11:21,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:11:21,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:21,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:21,468 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) [2022-03-01 17:11:21,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-01 17:11:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:21,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 17:11:21,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:21,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:11:21,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-01 17:11:21,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:11:21,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2022-03-01 17:11:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:21,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:21,742 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:21,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 2 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:21,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534777002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:21,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:21,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 21 [2022-03-01 17:11:21,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626902746] [2022-03-01 17:11:21,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:21,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:11:21,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:21,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:11:21,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:11:21,962 INFO L87 Difference]: Start difference. First operand 23198 states and 58515 transitions. Second operand has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 21 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:22,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:22,989 INFO L93 Difference]: Finished difference Result 31866 states and 79160 transitions. [2022-03-01 17:11:22,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:11:22,990 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 21 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:11:22,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:23,043 INFO L225 Difference]: With dead ends: 31866 [2022-03-01 17:11:23,044 INFO L226 Difference]: Without dead ends: 31796 [2022-03-01 17:11:23,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 76 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=1278, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:11:23,044 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 414 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 2017 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:23,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 831 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2017 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:11:23,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31796 states. [2022-03-01 17:11:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31796 to 27197. [2022-03-01 17:11:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27197 states, 27196 states have (on average 2.5342697455508163) internal successors, (68922), 27196 states have internal predecessors, (68922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27197 states to 27197 states and 68922 transitions. [2022-03-01 17:11:23,623 INFO L78 Accepts]: Start accepts. Automaton has 27197 states and 68922 transitions. Word has length 47 [2022-03-01 17:11:23,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:23,623 INFO L470 AbstractCegarLoop]: Abstraction has 27197 states and 68922 transitions. [2022-03-01 17:11:23,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 21 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:23,623 INFO L276 IsEmpty]: Start isEmpty. Operand 27197 states and 68922 transitions. [2022-03-01 17:11:23,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:23,644 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:23,644 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:23,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-03-01 17:11:23,844 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,SelfDestructingSolverStorable188 [2022-03-01 17:11:23,844 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:23,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1803665303, now seen corresponding path program 93 times [2022-03-01 17:11:23,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:23,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058076564] [2022-03-01 17:11:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:23,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:23,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:23,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058076564] [2022-03-01 17:11:23,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058076564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:23,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500803373] [2022-03-01 17:11:23,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:11:23,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:23,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:23,936 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) [2022-03-01 17:11:23,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-01 17:11:23,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-01 17:11:23,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:23,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:23,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:24,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:24,263 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:24,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:24,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500803373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:24,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:24,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:11:24,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596270511] [2022-03-01 17:11:24,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:24,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:11:24,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:24,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:11:24,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:11:24,357 INFO L87 Difference]: Start difference. First operand 27197 states and 68922 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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) [2022-03-01 17:11:24,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:24,655 INFO L93 Difference]: Finished difference Result 27246 states and 69002 transitions. [2022-03-01 17:11:24,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:11:24,655 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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 47 [2022-03-01 17:11:24,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:24,702 INFO L225 Difference]: With dead ends: 27246 [2022-03-01 17:11:24,702 INFO L226 Difference]: Without dead ends: 27223 [2022-03-01 17:11:24,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:11:24,702 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:24,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 106 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:11:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27223 states. [2022-03-01 17:11:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27223 to 27197. [2022-03-01 17:11:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27197 states, 27196 states have (on average 2.533828504191793) internal successors, (68910), 27196 states have internal predecessors, (68910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:25,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27197 states to 27197 states and 68910 transitions. [2022-03-01 17:11:25,150 INFO L78 Accepts]: Start accepts. Automaton has 27197 states and 68910 transitions. Word has length 47 [2022-03-01 17:11:25,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:25,150 INFO L470 AbstractCegarLoop]: Abstraction has 27197 states and 68910 transitions. [2022-03-01 17:11:25,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 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) [2022-03-01 17:11:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand 27197 states and 68910 transitions. [2022-03-01 17:11:25,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:25,171 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:25,171 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:25,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-03-01 17:11:25,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:25,372 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:25,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:25,372 INFO L85 PathProgramCache]: Analyzing trace with hash -496771877, now seen corresponding path program 50 times [2022-03-01 17:11:25,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:25,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456779986] [2022-03-01 17:11:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:25,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:25,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:25,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456779986] [2022-03-01 17:11:25,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456779986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:25,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729931869] [2022-03-01 17:11:25,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:11:25,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:25,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:25,458 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) [2022-03-01 17:11:25,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-01 17:11:25,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:11:25,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:25,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:25,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:25,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:25,695 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:11:25,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:11:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:25,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729931869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:25,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:25,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:11:25,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128580736] [2022-03-01 17:11:25,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:25,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:11:25,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:25,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:11:25,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:11:25,804 INFO L87 Difference]: Start difference. First operand 27197 states and 68910 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:26,230 INFO L93 Difference]: Finished difference Result 28174 states and 70971 transitions. [2022-03-01 17:11:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:11:26,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:11:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:26,277 INFO L225 Difference]: With dead ends: 28174 [2022-03-01 17:11:26,278 INFO L226 Difference]: Without dead ends: 28165 [2022-03-01 17:11:26,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:11:26,278 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 112 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:26,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 325 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:11:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28165 states. [2022-03-01 17:11:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28165 to 26980. [2022-03-01 17:11:26,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26980 states, 26979 states have (on average 2.534304459023685) internal successors, (68373), 26979 states have internal predecessors, (68373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:26,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26980 states to 26980 states and 68373 transitions. [2022-03-01 17:11:26,738 INFO L78 Accepts]: Start accepts. Automaton has 26980 states and 68373 transitions. Word has length 47 [2022-03-01 17:11:26,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:26,738 INFO L470 AbstractCegarLoop]: Abstraction has 26980 states and 68373 transitions. [2022-03-01 17:11:26,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:26,738 INFO L276 IsEmpty]: Start isEmpty. Operand 26980 states and 68373 transitions. [2022-03-01 17:11:26,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:26,759 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:26,759 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:26,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-03-01 17:11:26,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:26,961 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:26,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1625441525, now seen corresponding path program 94 times [2022-03-01 17:11:26,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:26,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270614357] [2022-03-01 17:11:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:26,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:27,044 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:27,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270614357] [2022-03-01 17:11:27,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270614357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:27,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590244777] [2022-03-01 17:11:27,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:11:27,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:27,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:27,045 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) [2022-03-01 17:11:27,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-01 17:11:27,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:11:27,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:27,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:27,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:27,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:27,212 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:11:27,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:11:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:27,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590244777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:27,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:27,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-03-01 17:11:27,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754995405] [2022-03-01 17:11:27,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:27,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:11:27,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:27,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:11:27,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:11:27,314 INFO L87 Difference]: Start difference. First operand 26980 states and 68373 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:27,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:27,800 INFO L93 Difference]: Finished difference Result 27646 states and 69694 transitions. [2022-03-01 17:11:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:11:27,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:11:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:27,846 INFO L225 Difference]: With dead ends: 27646 [2022-03-01 17:11:27,847 INFO L226 Difference]: Without dead ends: 27529 [2022-03-01 17:11:27,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:11:27,847 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 116 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:27,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 371 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:11:27,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27529 states. [2022-03-01 17:11:28,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27529 to 26990. [2022-03-01 17:11:28,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26990 states, 26989 states have (on average 2.5320315684167625) internal successors, (68337), 26989 states have internal predecessors, (68337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:28,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26990 states to 26990 states and 68337 transitions. [2022-03-01 17:11:28,291 INFO L78 Accepts]: Start accepts. Automaton has 26990 states and 68337 transitions. Word has length 47 [2022-03-01 17:11:28,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:28,291 INFO L470 AbstractCegarLoop]: Abstraction has 26990 states and 68337 transitions. [2022-03-01 17:11:28,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:28,292 INFO L276 IsEmpty]: Start isEmpty. Operand 26990 states and 68337 transitions. [2022-03-01 17:11:28,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:28,313 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:28,313 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:28,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-03-01 17:11:28,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:28,514 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:28,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:28,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1011905345, now seen corresponding path program 95 times [2022-03-01 17:11:28,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:28,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381978791] [2022-03-01 17:11:28,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:28,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:28,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:28,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381978791] [2022-03-01 17:11:28,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381978791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:28,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52806165] [2022-03-01 17:11:28,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:11:28,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:28,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:28,605 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) [2022-03-01 17:11:28,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-01 17:11:28,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-01 17:11:28,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:28,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:28,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:28,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:28,766 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:11:28,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:11:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:28,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52806165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:28,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:28,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-01 17:11:28,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589211660] [2022-03-01 17:11:28,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:28,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:11:28,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:28,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:11:28,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:11:28,869 INFO L87 Difference]: Start difference. First operand 26990 states and 68337 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:29,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:29,265 INFO L93 Difference]: Finished difference Result 27815 states and 70065 transitions. [2022-03-01 17:11:29,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:11:29,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:11:29,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:29,311 INFO L225 Difference]: With dead ends: 27815 [2022-03-01 17:11:29,311 INFO L226 Difference]: Without dead ends: 27803 [2022-03-01 17:11:29,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 91 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:11:29,312 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 104 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:29,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 299 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:11:29,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27803 states. [2022-03-01 17:11:29,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27803 to 26994. [2022-03-01 17:11:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26994 states, 26993 states have (on average 2.531952728485163) internal successors, (68345), 26993 states have internal predecessors, (68345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26994 states to 26994 states and 68345 transitions. [2022-03-01 17:11:29,751 INFO L78 Accepts]: Start accepts. Automaton has 26994 states and 68345 transitions. Word has length 47 [2022-03-01 17:11:29,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:29,751 INFO L470 AbstractCegarLoop]: Abstraction has 26994 states and 68345 transitions. [2022-03-01 17:11:29,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:29,751 INFO L276 IsEmpty]: Start isEmpty. Operand 26994 states and 68345 transitions. [2022-03-01 17:11:29,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:29,771 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:29,772 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:29,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-03-01 17:11:29,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:29,972 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:29,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:29,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1141144617, now seen corresponding path program 96 times [2022-03-01 17:11:29,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:29,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084918166] [2022-03-01 17:11:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:29,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:30,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:30,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084918166] [2022-03-01 17:11:30,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084918166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:30,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255874835] [2022-03-01 17:11:30,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:11:30,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:30,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:30,065 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) [2022-03-01 17:11:30,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-01 17:11:30,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-01 17:11:30,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:30,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:30,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:30,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:30,245 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:30,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:30,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255874835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:30,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:30,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-01 17:11:30,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010055141] [2022-03-01 17:11:30,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:30,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:11:30,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:30,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:11:30,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:11:30,348 INFO L87 Difference]: Start difference. First operand 26994 states and 68345 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:30,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:30,901 INFO L93 Difference]: Finished difference Result 29078 states and 72893 transitions. [2022-03-01 17:11:30,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:11:30,902 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:11:30,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:30,958 INFO L225 Difference]: With dead ends: 29078 [2022-03-01 17:11:30,958 INFO L226 Difference]: Without dead ends: 29024 [2022-03-01 17:11:30,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:11:30,959 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 262 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:30,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 381 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:11:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29024 states. [2022-03-01 17:11:31,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29024 to 27102. [2022-03-01 17:11:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27102 states, 27101 states have (on average 2.532341980000738) internal successors, (68629), 27101 states have internal predecessors, (68629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27102 states to 27102 states and 68629 transitions. [2022-03-01 17:11:31,495 INFO L78 Accepts]: Start accepts. Automaton has 27102 states and 68629 transitions. Word has length 47 [2022-03-01 17:11:31,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:31,495 INFO L470 AbstractCegarLoop]: Abstraction has 27102 states and 68629 transitions. [2022-03-01 17:11:31,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:31,496 INFO L276 IsEmpty]: Start isEmpty. Operand 27102 states and 68629 transitions. [2022-03-01 17:11:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:31,517 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:31,517 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:31,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-03-01 17:11:31,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:31,717 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:31,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:31,718 INFO L85 PathProgramCache]: Analyzing trace with hash -986308083, now seen corresponding path program 97 times [2022-03-01 17:11:31,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:31,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149417763] [2022-03-01 17:11:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:31,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:31,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:31,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149417763] [2022-03-01 17:11:31,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149417763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:31,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43775431] [2022-03-01 17:11:31,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:11:31,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:31,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:31,811 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) [2022-03-01 17:11:31,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-01 17:11:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:31,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 17:11:31,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:32,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:11:32,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-01 17:11:32,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:11:32,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2022-03-01 17:11:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:32,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:32,113 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:32,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:32,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43775431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:32,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:32,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 24 [2022-03-01 17:11:32,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035069812] [2022-03-01 17:11:32,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:32,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:11:32,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:32,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:11:32,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:11:32,328 INFO L87 Difference]: Start difference. First operand 27102 states and 68629 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:34,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:34,442 INFO L93 Difference]: Finished difference Result 36740 states and 89922 transitions. [2022-03-01 17:11:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-01 17:11:34,443 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:11:34,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:34,508 INFO L225 Difference]: With dead ends: 36740 [2022-03-01 17:11:34,508 INFO L226 Difference]: Without dead ends: 36474 [2022-03-01 17:11:34,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2717 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=981, Invalid=7761, Unknown=0, NotChecked=0, Total=8742 [2022-03-01 17:11:34,510 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 1189 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:34,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1189 Valid, 1275 Invalid, 2623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 2544 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 17:11:34,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36474 states. [2022-03-01 17:11:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36474 to 28019. [2022-03-01 17:11:35,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28019 states, 28018 states have (on average 2.533656934827611) internal successors, (70988), 28018 states have internal predecessors, (70988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28019 states to 28019 states and 70988 transitions. [2022-03-01 17:11:35,214 INFO L78 Accepts]: Start accepts. Automaton has 28019 states and 70988 transitions. Word has length 47 [2022-03-01 17:11:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:35,214 INFO L470 AbstractCegarLoop]: Abstraction has 28019 states and 70988 transitions. [2022-03-01 17:11:35,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 28019 states and 70988 transitions. [2022-03-01 17:11:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:35,237 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:35,237 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:35,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-03-01 17:11:35,437 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,SelfDestructingSolverStorable194 [2022-03-01 17:11:35,438 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:35,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:35,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1045999593, now seen corresponding path program 98 times [2022-03-01 17:11:35,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:35,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029870959] [2022-03-01 17:11:35,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:35,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:35,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:35,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029870959] [2022-03-01 17:11:35,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029870959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:35,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899485078] [2022-03-01 17:11:35,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:11:35,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:35,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:35,539 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) [2022-03-01 17:11:35,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-01 17:11:35,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:11:35,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:35,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:35,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:35,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:35,716 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:35,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:35,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899485078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:35,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:35,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-03-01 17:11:35,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941316188] [2022-03-01 17:11:35,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:35,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:11:35,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:35,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:11:35,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:11:35,798 INFO L87 Difference]: Start difference. First operand 28019 states and 70988 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:37,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:37,107 INFO L93 Difference]: Finished difference Result 40175 states and 98525 transitions. [2022-03-01 17:11:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-01 17:11:37,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:11:37,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:37,178 INFO L225 Difference]: With dead ends: 40175 [2022-03-01 17:11:37,179 INFO L226 Difference]: Without dead ends: 39653 [2022-03-01 17:11:37,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=645, Invalid=5517, Unknown=0, NotChecked=0, Total=6162 [2022-03-01 17:11:37,180 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1235 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:37,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1235 Valid, 557 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:11:37,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39653 states. [2022-03-01 17:11:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39653 to 28643. [2022-03-01 17:11:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28643 states, 28642 states have (on average 2.5344947978493124) internal successors, (72593), 28642 states have internal predecessors, (72593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:37,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28643 states to 28643 states and 72593 transitions. [2022-03-01 17:11:37,847 INFO L78 Accepts]: Start accepts. Automaton has 28643 states and 72593 transitions. Word has length 47 [2022-03-01 17:11:37,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:37,847 INFO L470 AbstractCegarLoop]: Abstraction has 28643 states and 72593 transitions. [2022-03-01 17:11:37,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:37,847 INFO L276 IsEmpty]: Start isEmpty. Operand 28643 states and 72593 transitions. [2022-03-01 17:11:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:37,869 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:37,869 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:37,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-03-01 17:11:38,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:38,070 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:38,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:38,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1199313459, now seen corresponding path program 99 times [2022-03-01 17:11:38,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:38,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970366559] [2022-03-01 17:11:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:38,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:38,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:38,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970366559] [2022-03-01 17:11:38,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970366559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:38,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836123808] [2022-03-01 17:11:38,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:11:38,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:38,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:38,180 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) [2022-03-01 17:11:38,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-01 17:11:38,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-01 17:11:38,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:38,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:38,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:38,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:38,354 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:38,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:11:38,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836123808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:38,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:38,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 13 [2022-03-01 17:11:38,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889286183] [2022-03-01 17:11:38,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:38,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:11:38,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:38,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:11:38,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:11:38,426 INFO L87 Difference]: Start difference. First operand 28643 states and 72593 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:40,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:40,410 INFO L93 Difference]: Finished difference Result 45394 states and 112859 transitions. [2022-03-01 17:11:40,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-01 17:11:40,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:11:40,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:40,492 INFO L225 Difference]: With dead ends: 45394 [2022-03-01 17:11:40,492 INFO L226 Difference]: Without dead ends: 44776 [2022-03-01 17:11:40,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6451 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1455, Invalid=14547, Unknown=0, NotChecked=0, Total=16002 [2022-03-01 17:11:40,494 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 1702 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1702 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:40,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1702 Valid, 481 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:11:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44776 states. [2022-03-01 17:11:41,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44776 to 31291. [2022-03-01 17:11:41,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31291 states, 31290 states have (on average 2.5506232023010544) internal successors, (79809), 31290 states have internal predecessors, (79809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31291 states to 31291 states and 79809 transitions. [2022-03-01 17:11:41,257 INFO L78 Accepts]: Start accepts. Automaton has 31291 states and 79809 transitions. Word has length 47 [2022-03-01 17:11:41,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:41,257 INFO L470 AbstractCegarLoop]: Abstraction has 31291 states and 79809 transitions. [2022-03-01 17:11:41,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:41,257 INFO L276 IsEmpty]: Start isEmpty. Operand 31291 states and 79809 transitions. [2022-03-01 17:11:41,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-01 17:11:41,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:41,280 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:41,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-03-01 17:11:41,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:41,480 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:41,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:41,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1272507479, now seen corresponding path program 100 times [2022-03-01 17:11:41,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:41,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041163522] [2022-03-01 17:11:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:41,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:11:41,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:41,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041163522] [2022-03-01 17:11:41,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041163522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:41,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344751998] [2022-03-01 17:11:41,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:11:41,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:41,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:41,593 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) [2022-03-01 17:11:41,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-01 17:11:41,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:11:41,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:41,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 17:11:41,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:41,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:11:41,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-03-01 17:11:41,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:11:41,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2022-03-01 17:11:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:11:41,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:42,079 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:42,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:11:42,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344751998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:42,259 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:42,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 33 [2022-03-01 17:11:42,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223763213] [2022-03-01 17:11:42,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:42,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:11:42,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:42,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:11:42,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:11:42,260 INFO L87 Difference]: Start difference. First operand 31291 states and 79809 transitions. Second operand has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:46,259 INFO L93 Difference]: Finished difference Result 53023 states and 130282 transitions. [2022-03-01 17:11:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-03-01 17:11:46,259 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-01 17:11:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:46,363 INFO L225 Difference]: With dead ends: 53023 [2022-03-01 17:11:46,363 INFO L226 Difference]: Without dead ends: 52117 [2022-03-01 17:11:46,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7787 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2586, Invalid=20670, Unknown=0, NotChecked=0, Total=23256 [2022-03-01 17:11:46,366 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 1765 mSDsluCounter, 2170 mSDsCounter, 0 mSdLazyCounter, 3855 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 4015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 3855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:46,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1765 Valid, 1579 Invalid, 4015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 3855 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-01 17:11:46,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52117 states. [2022-03-01 17:11:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52117 to 33886. [2022-03-01 17:11:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33886 states, 33885 states have (on average 2.554375092223698) internal successors, (86555), 33885 states have internal predecessors, (86555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:47,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33886 states to 33886 states and 86555 transitions. [2022-03-01 17:11:47,222 INFO L78 Accepts]: Start accepts. Automaton has 33886 states and 86555 transitions. Word has length 47 [2022-03-01 17:11:47,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:47,222 INFO L470 AbstractCegarLoop]: Abstraction has 33886 states and 86555 transitions. [2022-03-01 17:11:47,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.2058823529411766) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:47,222 INFO L276 IsEmpty]: Start isEmpty. Operand 33886 states and 86555 transitions. [2022-03-01 17:11:47,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-01 17:11:47,247 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:47,248 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:47,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-03-01 17:11:47,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:47,448 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:47,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:47,449 INFO L85 PathProgramCache]: Analyzing trace with hash -539236665, now seen corresponding path program 101 times [2022-03-01 17:11:47,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:47,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830931695] [2022-03-01 17:11:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:47,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:47,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:47,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830931695] [2022-03-01 17:11:47,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830931695] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:47,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995007006] [2022-03-01 17:11:47,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:11:47,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:47,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:47,522 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) [2022-03-01 17:11:47,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-01 17:11:47,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-01 17:11:47,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:47,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 17:11:47,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:47,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:47,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995007006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:47,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:47,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-03-01 17:11:47,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757627955] [2022-03-01 17:11:47,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:47,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:11:47,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:47,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:11:47,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:11:47,860 INFO L87 Difference]: Start difference. First operand 33886 states and 86555 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:48,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:48,209 INFO L93 Difference]: Finished difference Result 35433 states and 89971 transitions. [2022-03-01 17:11:48,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:11:48,209 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-03-01 17:11:48,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:48,271 INFO L225 Difference]: With dead ends: 35433 [2022-03-01 17:11:48,272 INFO L226 Difference]: Without dead ends: 35399 [2022-03-01 17:11:48,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:11:48,272 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 77 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:48,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 266 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:11:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35399 states. [2022-03-01 17:11:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35399 to 34688. [2022-03-01 17:11:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34688 states, 34687 states have (on average 2.5474673508807335) internal successors, (88364), 34687 states have internal predecessors, (88364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34688 states to 34688 states and 88364 transitions. [2022-03-01 17:11:49,062 INFO L78 Accepts]: Start accepts. Automaton has 34688 states and 88364 transitions. Word has length 50 [2022-03-01 17:11:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:49,062 INFO L470 AbstractCegarLoop]: Abstraction has 34688 states and 88364 transitions. [2022-03-01 17:11:49,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 34688 states and 88364 transitions. [2022-03-01 17:11:49,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-01 17:11:49,088 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:49,088 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:49,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-03-01 17:11:49,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:49,288 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:49,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:49,288 INFO L85 PathProgramCache]: Analyzing trace with hash 547340560, now seen corresponding path program 51 times [2022-03-01 17:11:49,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:49,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659926013] [2022-03-01 17:11:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:49,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-01 17:11:49,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:49,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659926013] [2022-03-01 17:11:49,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659926013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:49,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635600312] [2022-03-01 17:11:49,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:11:49,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:49,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:49,366 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) [2022-03-01 17:11:49,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-01 17:11:49,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-01 17:11:49,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:49,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 17:11:49,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-01 17:11:49,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-01 17:11:49,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635600312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:49,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:49,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-03-01 17:11:49,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717898266] [2022-03-01 17:11:49,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:49,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:11:49,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:49,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:11:49,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:11:49,901 INFO L87 Difference]: Start difference. First operand 34688 states and 88364 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:50,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:50,247 INFO L93 Difference]: Finished difference Result 35842 states and 90763 transitions. [2022-03-01 17:11:50,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:11:50,248 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-03-01 17:11:50,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:50,309 INFO L225 Difference]: With dead ends: 35842 [2022-03-01 17:11:50,309 INFO L226 Difference]: Without dead ends: 35803 [2022-03-01 17:11:50,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:11:50,310 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 80 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:50,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 267 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:11:50,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35803 states. [2022-03-01 17:11:50,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35803 to 34688. [2022-03-01 17:11:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34688 states, 34687 states have (on average 2.547207887681264) internal successors, (88355), 34687 states have internal predecessors, (88355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34688 states to 34688 states and 88355 transitions. [2022-03-01 17:11:51,062 INFO L78 Accepts]: Start accepts. Automaton has 34688 states and 88355 transitions. Word has length 50 [2022-03-01 17:11:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:51,062 INFO L470 AbstractCegarLoop]: Abstraction has 34688 states and 88355 transitions. [2022-03-01 17:11:51,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:51,062 INFO L276 IsEmpty]: Start isEmpty. Operand 34688 states and 88355 transitions. [2022-03-01 17:11:51,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-01 17:11:51,088 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:51,089 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:51,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-03-01 17:11:51,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-01 17:11:51,299 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:51,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1656654610, now seen corresponding path program 1 times [2022-03-01 17:11:51,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:51,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558355198] [2022-03-01 17:11:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:51,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 25 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:11:51,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:51,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558355198] [2022-03-01 17:11:51,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558355198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:51,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891483044] [2022-03-01 17:11:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:51,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:51,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:51,439 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) [2022-03-01 17:11:51,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-01 17:11:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:51,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:51,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:11:51,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:51,861 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:51,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:11:51,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891483044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:51,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:51,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-03-01 17:11:51,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209369168] [2022-03-01 17:11:51,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:51,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:11:51,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:51,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:11:51,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:11:51,923 INFO L87 Difference]: Start difference. First operand 34688 states and 88355 transitions. Second operand has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 25 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:52,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:52,572 INFO L93 Difference]: Finished difference Result 34847 states and 88604 transitions. [2022-03-01 17:11:52,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:11:52,573 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 25 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-03-01 17:11:52,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:52,630 INFO L225 Difference]: With dead ends: 34847 [2022-03-01 17:11:52,631 INFO L226 Difference]: Without dead ends: 34687 [2022-03-01 17:11:52,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:11:52,631 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:52,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 335 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1227 Invalid, 0 Unknown, 169 Unchecked, 0.5s Time] [2022-03-01 17:11:52,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34687 states. [2022-03-01 17:11:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34687 to 34625. [2022-03-01 17:11:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34625 states, 34624 states have (on average 2.5462396025878005) internal successors, (88161), 34624 states have internal predecessors, (88161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:53,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34625 states to 34625 states and 88161 transitions. [2022-03-01 17:11:53,280 INFO L78 Accepts]: Start accepts. Automaton has 34625 states and 88161 transitions. Word has length 50 [2022-03-01 17:11:53,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:53,281 INFO L470 AbstractCegarLoop]: Abstraction has 34625 states and 88161 transitions. [2022-03-01 17:11:53,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 25 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:53,281 INFO L276 IsEmpty]: Start isEmpty. Operand 34625 states and 88161 transitions. [2022-03-01 17:11:53,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-01 17:11:53,306 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:53,306 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:53,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-03-01 17:11:53,507 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,SelfDestructingSolverStorable200 [2022-03-01 17:11:53,507 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:53,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1679284717, now seen corresponding path program 102 times [2022-03-01 17:11:53,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:53,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574506451] [2022-03-01 17:11:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:53,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 17:11:53,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:53,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574506451] [2022-03-01 17:11:53,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574506451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:53,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462178323] [2022-03-01 17:11:53,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:11:53,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:53,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:53,591 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) [2022-03-01 17:11:53,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-01 17:11:53,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-01 17:11:53,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:53,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 17:11:53,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 17:11:53,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-01 17:11:54,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462178323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:54,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:54,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-03-01 17:11:54,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102688718] [2022-03-01 17:11:54,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:54,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:11:54,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:54,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:11:54,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:11:54,029 INFO L87 Difference]: Start difference. First operand 34625 states and 88161 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:54,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:54,402 INFO L93 Difference]: Finished difference Result 35694 states and 90392 transitions. [2022-03-01 17:11:54,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:11:54,402 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-03-01 17:11:54,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:54,471 INFO L225 Difference]: With dead ends: 35694 [2022-03-01 17:11:54,471 INFO L226 Difference]: Without dead ends: 35642 [2022-03-01 17:11:54,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:11:54,471 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 81 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:54,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 276 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:11:54,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35642 states. [2022-03-01 17:11:55,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35642 to 34625. [2022-03-01 17:11:55,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34625 states, 34624 states have (on average 2.545286506469501) internal successors, (88128), 34624 states have internal predecessors, (88128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34625 states to 34625 states and 88128 transitions. [2022-03-01 17:11:55,306 INFO L78 Accepts]: Start accepts. Automaton has 34625 states and 88128 transitions. Word has length 50 [2022-03-01 17:11:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:55,306 INFO L470 AbstractCegarLoop]: Abstraction has 34625 states and 88128 transitions. [2022-03-01 17:11:55,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 34625 states and 88128 transitions. [2022-03-01 17:11:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-01 17:11:55,334 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:55,334 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:55,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-03-01 17:11:55,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-03-01 17:11:55,535 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:55,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:55,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1330720574, now seen corresponding path program 52 times [2022-03-01 17:11:55,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:55,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370252319] [2022-03-01 17:11:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:55,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-01 17:11:55,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:55,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370252319] [2022-03-01 17:11:55,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370252319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:55,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552333531] [2022-03-01 17:11:55,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:11:55,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:55,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:55,618 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) [2022-03-01 17:11:55,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-01 17:11:55,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:11:55,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:55,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 17:11:55,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-01 17:11:55,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-01 17:11:55,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552333531] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:55,928 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:55,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-03-01 17:11:55,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680479652] [2022-03-01 17:11:55,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:55,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:11:55,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:55,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:11:55,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:11:55,929 INFO L87 Difference]: Start difference. First operand 34625 states and 88128 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:56,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:56,319 INFO L93 Difference]: Finished difference Result 35658 states and 90295 transitions. [2022-03-01 17:11:56,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:11:56,320 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-03-01 17:11:56,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:56,559 INFO L225 Difference]: With dead ends: 35658 [2022-03-01 17:11:56,559 INFO L226 Difference]: Without dead ends: 35607 [2022-03-01 17:11:56,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:11:56,559 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 83 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:56,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 284 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:11:56,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35607 states. [2022-03-01 17:11:57,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35607 to 34625. [2022-03-01 17:11:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34625 states, 34624 states have (on average 2.5445644639556377) internal successors, (88103), 34624 states have internal predecessors, (88103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34625 states to 34625 states and 88103 transitions. [2022-03-01 17:11:57,349 INFO L78 Accepts]: Start accepts. Automaton has 34625 states and 88103 transitions. Word has length 50 [2022-03-01 17:11:57,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:57,350 INFO L470 AbstractCegarLoop]: Abstraction has 34625 states and 88103 transitions. [2022-03-01 17:11:57,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:57,350 INFO L276 IsEmpty]: Start isEmpty. Operand 34625 states and 88103 transitions. [2022-03-01 17:11:57,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-01 17:11:57,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:57,376 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:57,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-03-01 17:11:57,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-01 17:11:57,576 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:57,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:57,577 INFO L85 PathProgramCache]: Analyzing trace with hash 665028206, now seen corresponding path program 2 times [2022-03-01 17:11:57,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:57,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971361775] [2022-03-01 17:11:57,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:57,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:57,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:57,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971361775] [2022-03-01 17:11:57,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971361775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:57,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32720810] [2022-03-01 17:11:57,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:11:57,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:57,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:57,704 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) [2022-03-01 17:11:57,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-01 17:11:57,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:11:57,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:57,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:57,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:11:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:58,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:11:58,180 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:11:58,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:11:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:58,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32720810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:11:58,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:11:58,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-03-01 17:11:58,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323802686] [2022-03-01 17:11:58,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:11:58,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:11:58,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:11:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:11:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:11:58,244 INFO L87 Difference]: Start difference. First operand 34625 states and 88103 transitions. Second operand has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:58,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:11:58,613 INFO L93 Difference]: Finished difference Result 34790 states and 88361 transitions. [2022-03-01 17:11:58,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:11:58,613 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-03-01 17:11:58,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:11:58,673 INFO L225 Difference]: With dead ends: 34790 [2022-03-01 17:11:58,673 INFO L226 Difference]: Without dead ends: 34647 [2022-03-01 17:11:58,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 82 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:11:58,673 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 80 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:11:58,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 262 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 686 Invalid, 0 Unknown, 321 Unchecked, 0.2s Time] [2022-03-01 17:11:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34647 states. [2022-03-01 17:11:59,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34647 to 34080. [2022-03-01 17:11:59,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34080 states, 34079 states have (on average 2.5513952874204056) internal successors, (86949), 34079 states have internal predecessors, (86949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34080 states to 34080 states and 86949 transitions. [2022-03-01 17:11:59,415 INFO L78 Accepts]: Start accepts. Automaton has 34080 states and 86949 transitions. Word has length 50 [2022-03-01 17:11:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:11:59,415 INFO L470 AbstractCegarLoop]: Abstraction has 34080 states and 86949 transitions. [2022-03-01 17:11:59,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.652173913043478) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:11:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 34080 states and 86949 transitions. [2022-03-01 17:11:59,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-01 17:11:59,440 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:11:59,440 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:11:59,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-03-01 17:11:59,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:59,641 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:11:59,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:11:59,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1283395892, now seen corresponding path program 3 times [2022-03-01 17:11:59,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:11:59,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545579738] [2022-03-01 17:11:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:11:59,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:11:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:11:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:11:59,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:11:59,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545579738] [2022-03-01 17:11:59,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545579738] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:11:59,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828391747] [2022-03-01 17:11:59,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:11:59,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:11:59,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:11:59,770 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) [2022-03-01 17:11:59,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-01 17:11:59,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-01 17:11:59,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:11:59,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:11:59,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:00,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:00,104 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:12:00,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:12:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:00,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828391747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:00,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:00,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:12:00,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176765981] [2022-03-01 17:12:00,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:00,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:12:00,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:00,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:12:00,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:12:00,178 INFO L87 Difference]: Start difference. First operand 34080 states and 86949 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 19 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) [2022-03-01 17:12:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:00,628 INFO L93 Difference]: Finished difference Result 34164 states and 87076 transitions. [2022-03-01 17:12:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:12:00,629 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 19 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 50 [2022-03-01 17:12:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:00,685 INFO L225 Difference]: With dead ends: 34164 [2022-03-01 17:12:00,685 INFO L226 Difference]: Without dead ends: 34070 [2022-03-01 17:12:00,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:12:00,686 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:00,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 173 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 590 Invalid, 0 Unknown, 187 Unchecked, 0.2s Time] [2022-03-01 17:12:00,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34070 states. [2022-03-01 17:12:01,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34070 to 34044. [2022-03-01 17:12:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34044 states, 34043 states have (on average 2.551067767235555) internal successors, (86846), 34043 states have internal predecessors, (86846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34044 states to 34044 states and 86846 transitions. [2022-03-01 17:12:01,324 INFO L78 Accepts]: Start accepts. Automaton has 34044 states and 86846 transitions. Word has length 50 [2022-03-01 17:12:01,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:01,324 INFO L470 AbstractCegarLoop]: Abstraction has 34044 states and 86846 transitions. [2022-03-01 17:12:01,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 19 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) [2022-03-01 17:12:01,324 INFO L276 IsEmpty]: Start isEmpty. Operand 34044 states and 86846 transitions. [2022-03-01 17:12:01,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-01 17:12:01,350 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:01,350 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:01,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-03-01 17:12:01,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-03-01 17:12:01,550 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:01,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:01,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1528982738, now seen corresponding path program 4 times [2022-03-01 17:12:01,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:01,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732971730] [2022-03-01 17:12:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:01,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:01,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:01,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732971730] [2022-03-01 17:12:01,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732971730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:01,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485266004] [2022-03-01 17:12:01,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:12:01,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:01,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:01,663 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) [2022-03-01 17:12:01,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-01 17:12:01,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:12:01,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:01,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:12:01,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:01,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:01,941 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:12:01,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:12:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 23 proven. 84 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:02,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485266004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:02,154 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:02,154 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-03-01 17:12:02,154 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661954803] [2022-03-01 17:12:02,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:02,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:12:02,154 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:12:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:12:02,155 INFO L87 Difference]: Start difference. First operand 34044 states and 86846 transitions. Second operand has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 16 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) [2022-03-01 17:12:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:02,437 INFO L93 Difference]: Finished difference Result 34070 states and 86872 transitions. [2022-03-01 17:12:02,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:12:02,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 16 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 50 [2022-03-01 17:12:02,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:02,500 INFO L225 Difference]: With dead ends: 34070 [2022-03-01 17:12:02,500 INFO L226 Difference]: Without dead ends: 33979 [2022-03-01 17:12:02,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:12:02,500 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:02,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 107 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 508 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-03-01 17:12:02,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33979 states. [2022-03-01 17:12:03,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33979 to 33862. [2022-03-01 17:12:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33862 states, 33861 states have (on average 2.5514899146510737) internal successors, (86396), 33861 states have internal predecessors, (86396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:03,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33862 states to 33862 states and 86396 transitions. [2022-03-01 17:12:03,391 INFO L78 Accepts]: Start accepts. Automaton has 33862 states and 86396 transitions. Word has length 50 [2022-03-01 17:12:03,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:03,391 INFO L470 AbstractCegarLoop]: Abstraction has 33862 states and 86396 transitions. [2022-03-01 17:12:03,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.235294117647059) internal successors, (72), 16 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) [2022-03-01 17:12:03,391 INFO L276 IsEmpty]: Start isEmpty. Operand 33862 states and 86396 transitions. [2022-03-01 17:12:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-01 17:12:03,413 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:03,413 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:03,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-03-01 17:12:03,613 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,SelfDestructingSolverStorable205 [2022-03-01 17:12:03,613 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:03,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:03,614 INFO L85 PathProgramCache]: Analyzing trace with hash -648745823, now seen corresponding path program 103 times [2022-03-01 17:12:03,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:03,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769147964] [2022-03-01 17:12:03,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:03,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:12:03,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:03,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769147964] [2022-03-01 17:12:03,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769147964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:03,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389614097] [2022-03-01 17:12:03,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:12:03,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:03,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:03,689 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) [2022-03-01 17:12:03,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-01 17:12:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 17:12:03,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:12:03,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-01 17:12:03,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389614097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:03,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:03,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-03-01 17:12:03,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260757982] [2022-03-01 17:12:03,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:04,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:12:04,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:04,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:12:04,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:12:04,000 INFO L87 Difference]: Start difference. First operand 33862 states and 86396 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:04,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:04,363 INFO L93 Difference]: Finished difference Result 36593 states and 92480 transitions. [2022-03-01 17:12:04,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:12:04,363 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-03-01 17:12:04,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:04,428 INFO L225 Difference]: With dead ends: 36593 [2022-03-01 17:12:04,428 INFO L226 Difference]: Without dead ends: 36532 [2022-03-01 17:12:04,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:12:04,429 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 84 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:04,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 284 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:12:04,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36532 states. [2022-03-01 17:12:05,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36532 to 34558. [2022-03-01 17:12:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34558 states, 34557 states have (on average 2.5533466446740167) internal successors, (88236), 34557 states have internal predecessors, (88236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34558 states to 34558 states and 88236 transitions. [2022-03-01 17:12:05,182 INFO L78 Accepts]: Start accepts. Automaton has 34558 states and 88236 transitions. Word has length 50 [2022-03-01 17:12:05,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:05,182 INFO L470 AbstractCegarLoop]: Abstraction has 34558 states and 88236 transitions. [2022-03-01 17:12:05,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:05,182 INFO L276 IsEmpty]: Start isEmpty. Operand 34558 states and 88236 transitions. [2022-03-01 17:12:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:05,212 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:05,212 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:05,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-03-01 17:12:05,413 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,SelfDestructingSolverStorable206 [2022-03-01 17:12:05,413 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:05,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:05,413 INFO L85 PathProgramCache]: Analyzing trace with hash 487346049, now seen corresponding path program 104 times [2022-03-01 17:12:05,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:05,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567964689] [2022-03-01 17:12:05,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:05,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:12:05,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:05,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567964689] [2022-03-01 17:12:05,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567964689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:05,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852183722] [2022-03-01 17:12:05,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:12:05,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:05,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:05,585 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) [2022-03-01 17:12:05,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-01 17:12:05,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:12:05,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:05,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:12:05,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 70 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:12:05,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 70 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:12:06,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852183722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:06,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:06,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 19 [2022-03-01 17:12:06,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009298047] [2022-03-01 17:12:06,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:06,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:12:06,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:12:06,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:12:06,127 INFO L87 Difference]: Start difference. First operand 34558 states and 88236 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 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) [2022-03-01 17:12:06,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:06,908 INFO L93 Difference]: Finished difference Result 37934 states and 96009 transitions. [2022-03-01 17:12:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:12:06,908 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 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 53 [2022-03-01 17:12:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:06,979 INFO L225 Difference]: With dead ends: 37934 [2022-03-01 17:12:06,979 INFO L226 Difference]: Without dead ends: 37934 [2022-03-01 17:12:06,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=917, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:12:06,979 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 274 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:06,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 234 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:12:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37934 states. [2022-03-01 17:12:07,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37934 to 34153. [2022-03-01 17:12:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34153 states, 34152 states have (on average 2.5534082923401265) internal successors, (87204), 34152 states have internal predecessors, (87204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34153 states to 34153 states and 87204 transitions. [2022-03-01 17:12:07,839 INFO L78 Accepts]: Start accepts. Automaton has 34153 states and 87204 transitions. Word has length 53 [2022-03-01 17:12:07,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:07,840 INFO L470 AbstractCegarLoop]: Abstraction has 34153 states and 87204 transitions. [2022-03-01 17:12:07,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 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) [2022-03-01 17:12:07,840 INFO L276 IsEmpty]: Start isEmpty. Operand 34153 states and 87204 transitions. [2022-03-01 17:12:07,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:07,866 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:07,866 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:07,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-03-01 17:12:08,066 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,SelfDestructingSolverStorable207 [2022-03-01 17:12:08,066 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:08,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1334489720, now seen corresponding path program 53 times [2022-03-01 17:12:08,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:08,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293759610] [2022-03-01 17:12:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:08,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:12:08,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:08,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293759610] [2022-03-01 17:12:08,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293759610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:08,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135857566] [2022-03-01 17:12:08,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:12:08,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:08,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:08,228 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) [2022-03-01 17:12:08,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-01 17:12:08,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-01 17:12:08,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:08,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:08,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:12:08,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:08,427 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:12:08,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:12:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:12:08,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135857566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:08,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:08,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 16 [2022-03-01 17:12:08,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233946739] [2022-03-01 17:12:08,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:08,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:12:08,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:12:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:12:08,501 INFO L87 Difference]: Start difference. First operand 34153 states and 87204 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:09,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:09,420 INFO L93 Difference]: Finished difference Result 39403 states and 99402 transitions. [2022-03-01 17:12:09,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:12:09,420 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-01 17:12:09,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:09,616 INFO L225 Difference]: With dead ends: 39403 [2022-03-01 17:12:09,616 INFO L226 Difference]: Without dead ends: 39346 [2022-03-01 17:12:09,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:12:09,616 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 574 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:09,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 698 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1618 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:12:09,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39346 states. [2022-03-01 17:12:10,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39346 to 33633. [2022-03-01 17:12:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33633 states, 33632 states have (on average 2.5527473834443386) internal successors, (85854), 33632 states have internal predecessors, (85854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33633 states to 33633 states and 85854 transitions. [2022-03-01 17:12:10,295 INFO L78 Accepts]: Start accepts. Automaton has 33633 states and 85854 transitions. Word has length 53 [2022-03-01 17:12:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:10,295 INFO L470 AbstractCegarLoop]: Abstraction has 33633 states and 85854 transitions. [2022-03-01 17:12:10,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 33633 states and 85854 transitions. [2022-03-01 17:12:10,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:10,322 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:10,322 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:10,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-03-01 17:12:10,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:10,523 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:10,523 INFO L85 PathProgramCache]: Analyzing trace with hash 723607176, now seen corresponding path program 105 times [2022-03-01 17:12:10,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:10,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087456001] [2022-03-01 17:12:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:10,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:10,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:10,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087456001] [2022-03-01 17:12:10,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087456001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:10,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317373928] [2022-03-01 17:12:10,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:12:10,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:10,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:10,635 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) [2022-03-01 17:12:10,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-01 17:12:10,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-01 17:12:10,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:10,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:10,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:10,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:10,891 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:12:10,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:12:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:11,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317373928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:11,004 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:11,004 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-03-01 17:12:11,004 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449365193] [2022-03-01 17:12:11,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:11,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:12:11,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:11,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:12:11,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:12:11,005 INFO L87 Difference]: Start difference. First operand 33633 states and 85854 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 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) [2022-03-01 17:12:11,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:11,524 INFO L93 Difference]: Finished difference Result 34076 states and 86681 transitions. [2022-03-01 17:12:11,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:12:11,524 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 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 53 [2022-03-01 17:12:11,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:11,586 INFO L225 Difference]: With dead ends: 34076 [2022-03-01 17:12:11,587 INFO L226 Difference]: Without dead ends: 34026 [2022-03-01 17:12:11,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:12:11,587 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 98 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:11,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 435 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 839 Invalid, 0 Unknown, 185 Unchecked, 0.3s Time] [2022-03-01 17:12:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34026 states. [2022-03-01 17:12:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34026 to 33651. [2022-03-01 17:12:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33651 states, 33650 states have (on average 2.5522734026745915) internal successors, (85884), 33650 states have internal predecessors, (85884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:12,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33651 states to 33651 states and 85884 transitions. [2022-03-01 17:12:12,237 INFO L78 Accepts]: Start accepts. Automaton has 33651 states and 85884 transitions. Word has length 53 [2022-03-01 17:12:12,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:12,237 INFO L470 AbstractCegarLoop]: Abstraction has 33651 states and 85884 transitions. [2022-03-01 17:12:12,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 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) [2022-03-01 17:12:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 33651 states and 85884 transitions. [2022-03-01 17:12:12,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:12,266 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:12,266 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:12,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-03-01 17:12:12,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:12,467 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:12,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:12,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2046886724, now seen corresponding path program 106 times [2022-03-01 17:12:12,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:12,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143771634] [2022-03-01 17:12:12,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:12,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:12,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:12,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143771634] [2022-03-01 17:12:12,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143771634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:12,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189182425] [2022-03-01 17:12:12,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:12:12,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:12,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:12,577 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) [2022-03-01 17:12:12,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-01 17:12:12,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:12:12,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:12,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:12,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:12,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:12,762 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:12:12,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:12:12,883 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:12,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189182425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:12,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:12,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-03-01 17:12:12,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776799489] [2022-03-01 17:12:12,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:12,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:12:12,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:12,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:12:13,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:12:13,000 INFO L87 Difference]: Start difference. First operand 33651 states and 85884 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:13,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:13,322 INFO L93 Difference]: Finished difference Result 33796 states and 86110 transitions. [2022-03-01 17:12:13,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:12:13,322 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-01 17:12:13,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:13,381 INFO L225 Difference]: With dead ends: 33796 [2022-03-01 17:12:13,382 INFO L226 Difference]: Without dead ends: 33764 [2022-03-01 17:12:13,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 104 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:12:13,382 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 47 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:13,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 195 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:12:13,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33764 states. [2022-03-01 17:12:14,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33764 to 33657. [2022-03-01 17:12:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33657 states, 33656 states have (on average 2.5519966722129785) internal successors, (85890), 33656 states have internal predecessors, (85890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33657 states to 33657 states and 85890 transitions. [2022-03-01 17:12:14,112 INFO L78 Accepts]: Start accepts. Automaton has 33657 states and 85890 transitions. Word has length 53 [2022-03-01 17:12:14,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:14,112 INFO L470 AbstractCegarLoop]: Abstraction has 33657 states and 85890 transitions. [2022-03-01 17:12:14,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 33657 states and 85890 transitions. [2022-03-01 17:12:14,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:14,140 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:14,140 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:14,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-03-01 17:12:14,341 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,SelfDestructingSolverStorable210 [2022-03-01 17:12:14,341 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:14,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:14,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1634544392, now seen corresponding path program 107 times [2022-03-01 17:12:14,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:14,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674926445] [2022-03-01 17:12:14,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:14,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:14,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:14,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674926445] [2022-03-01 17:12:14,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674926445] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:14,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687898307] [2022-03-01 17:12:14,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:12:14,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:14,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:14,441 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) [2022-03-01 17:12:14,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-01 17:12:14,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-01 17:12:14,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:14,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:14,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:14,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:14,716 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:12:14,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:12:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:14,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687898307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:14,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:14,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-01 17:12:14,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112021743] [2022-03-01 17:12:14,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:14,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:12:14,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:14,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:12:14,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:12:14,840 INFO L87 Difference]: Start difference. First operand 33657 states and 85890 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:15,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:15,224 INFO L93 Difference]: Finished difference Result 34600 states and 87892 transitions. [2022-03-01 17:12:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:12:15,224 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-01 17:12:15,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:15,291 INFO L225 Difference]: With dead ends: 34600 [2022-03-01 17:12:15,291 INFO L226 Difference]: Without dead ends: 34576 [2022-03-01 17:12:15,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 104 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:12:15,291 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:15,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 159 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:12:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34576 states. [2022-03-01 17:12:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34576 to 33662. [2022-03-01 17:12:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33662 states, 33661 states have (on average 2.5521523424734855) internal successors, (85908), 33661 states have internal predecessors, (85908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33662 states to 33662 states and 85908 transitions. [2022-03-01 17:12:15,927 INFO L78 Accepts]: Start accepts. Automaton has 33662 states and 85908 transitions. Word has length 53 [2022-03-01 17:12:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:15,927 INFO L470 AbstractCegarLoop]: Abstraction has 33662 states and 85908 transitions. [2022-03-01 17:12:15,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 33662 states and 85908 transitions. [2022-03-01 17:12:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:15,955 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:15,955 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:15,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-03-01 17:12:16,156 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,SelfDestructingSolverStorable211 [2022-03-01 17:12:16,156 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:16,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:16,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1452891954, now seen corresponding path program 108 times [2022-03-01 17:12:16,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:16,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396027135] [2022-03-01 17:12:16,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:16,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:16,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:16,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396027135] [2022-03-01 17:12:16,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396027135] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:16,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557325962] [2022-03-01 17:12:16,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:12:16,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:16,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:16,365 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) [2022-03-01 17:12:16,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-01 17:12:16,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-01 17:12:16,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:16,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:16,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:16,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:16,657 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:12:16,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:12:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:16,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557325962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:16,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:16,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-03-01 17:12:16,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515795866] [2022-03-01 17:12:16,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:16,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:12:16,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:16,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:12:16,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:12:16,769 INFO L87 Difference]: Start difference. First operand 33662 states and 85908 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 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) [2022-03-01 17:12:17,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:17,169 INFO L93 Difference]: Finished difference Result 33840 states and 86194 transitions. [2022-03-01 17:12:17,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:12:17,169 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 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 53 [2022-03-01 17:12:17,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:17,229 INFO L225 Difference]: With dead ends: 33840 [2022-03-01 17:12:17,229 INFO L226 Difference]: Without dead ends: 33764 [2022-03-01 17:12:17,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:12:17,229 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 58 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:17,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 277 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 836 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-03-01 17:12:17,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33764 states. [2022-03-01 17:12:17,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33764 to 33656. [2022-03-01 17:12:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33656 states, 33655 states have (on average 2.5518050809686526) internal successors, (85881), 33655 states have internal predecessors, (85881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33656 states to 33656 states and 85881 transitions. [2022-03-01 17:12:17,872 INFO L78 Accepts]: Start accepts. Automaton has 33656 states and 85881 transitions. Word has length 53 [2022-03-01 17:12:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:17,872 INFO L470 AbstractCegarLoop]: Abstraction has 33656 states and 85881 transitions. [2022-03-01 17:12:17,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 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) [2022-03-01 17:12:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 33656 states and 85881 transitions. [2022-03-01 17:12:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:17,900 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:17,900 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:17,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-03-01 17:12:18,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-03-01 17:12:18,100 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:18,101 INFO L85 PathProgramCache]: Analyzing trace with hash -525749867, now seen corresponding path program 54 times [2022-03-01 17:12:18,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:18,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84697025] [2022-03-01 17:12:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:18,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:12:18,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:18,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84697025] [2022-03-01 17:12:18,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84697025] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:18,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585418874] [2022-03-01 17:12:18,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:12:18,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:18,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:18,246 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) [2022-03-01 17:12:18,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-01 17:12:18,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-01 17:12:18,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:18,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:12:18,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:12:18,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 59 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:12:19,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585418874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:19,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:19,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 18] total 38 [2022-03-01 17:12:19,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080313440] [2022-03-01 17:12:19,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:19,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-01 17:12:19,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:19,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-01 17:12:19,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1128, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:12:19,366 INFO L87 Difference]: Start difference. First operand 33656 states and 85881 transitions. Second operand has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 38 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:20,155 INFO L93 Difference]: Finished difference Result 39749 states and 99054 transitions. [2022-03-01 17:12:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:12:20,155 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 38 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-01 17:12:20,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:20,224 INFO L225 Difference]: With dead ends: 39749 [2022-03-01 17:12:20,224 INFO L226 Difference]: Without dead ends: 39606 [2022-03-01 17:12:20,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=851, Invalid=2455, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 17:12:20,225 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 755 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:20,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 282 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:12:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39606 states. [2022-03-01 17:12:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39606 to 33884. [2022-03-01 17:12:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33884 states, 33883 states have (on average 2.5614319865419235) internal successors, (86789), 33883 states have internal predecessors, (86789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33884 states to 33884 states and 86789 transitions. [2022-03-01 17:12:21,014 INFO L78 Accepts]: Start accepts. Automaton has 33884 states and 86789 transitions. Word has length 53 [2022-03-01 17:12:21,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:21,014 INFO L470 AbstractCegarLoop]: Abstraction has 33884 states and 86789 transitions. [2022-03-01 17:12:21,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.282051282051282) internal successors, (128), 38 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:21,014 INFO L276 IsEmpty]: Start isEmpty. Operand 33884 states and 86789 transitions. [2022-03-01 17:12:21,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:21,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:21,040 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:21,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-03-01 17:12:21,241 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,SelfDestructingSolverStorable213 [2022-03-01 17:12:21,241 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:21,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:21,242 INFO L85 PathProgramCache]: Analyzing trace with hash 279114444, now seen corresponding path program 55 times [2022-03-01 17:12:21,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:21,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270750681] [2022-03-01 17:12:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:21,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:21,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:21,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270750681] [2022-03-01 17:12:21,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270750681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:21,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739352397] [2022-03-01 17:12:21,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:12:21,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:21,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:21,342 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) [2022-03-01 17:12:21,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-01 17:12:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:21,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:21,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:21,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:21,524 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:12:21,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:12:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:21,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739352397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:21,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:21,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-01 17:12:21,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971336896] [2022-03-01 17:12:21,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:21,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:12:21,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:21,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:12:21,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:12:21,646 INFO L87 Difference]: Start difference. First operand 33884 states and 86789 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:22,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:22,139 INFO L93 Difference]: Finished difference Result 35869 states and 90945 transitions. [2022-03-01 17:12:22,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:12:22,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-01 17:12:22,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:22,205 INFO L225 Difference]: With dead ends: 35869 [2022-03-01 17:12:22,205 INFO L226 Difference]: Without dead ends: 35818 [2022-03-01 17:12:22,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:12:22,206 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 198 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:22,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 411 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:12:22,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35818 states. [2022-03-01 17:12:22,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35818 to 34090. [2022-03-01 17:12:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34090 states, 34089 states have (on average 2.5612954325442225) internal successors, (87312), 34089 states have internal predecessors, (87312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34090 states to 34090 states and 87312 transitions. [2022-03-01 17:12:23,066 INFO L78 Accepts]: Start accepts. Automaton has 34090 states and 87312 transitions. Word has length 53 [2022-03-01 17:12:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:23,066 INFO L470 AbstractCegarLoop]: Abstraction has 34090 states and 87312 transitions. [2022-03-01 17:12:23,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:23,066 INFO L276 IsEmpty]: Start isEmpty. Operand 34090 states and 87312 transitions. [2022-03-01 17:12:23,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:23,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:23,094 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:23,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-03-01 17:12:23,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:23,294 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:23,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1893639450, now seen corresponding path program 109 times [2022-03-01 17:12:23,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:23,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881118450] [2022-03-01 17:12:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:23,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:23,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:23,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881118450] [2022-03-01 17:12:23,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881118450] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:23,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719263202] [2022-03-01 17:12:23,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:12:23,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:23,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:23,411 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) [2022-03-01 17:12:23,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-01 17:12:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:23,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:23,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:23,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:23,606 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:12:23,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:12:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:23,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719263202] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:23,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:23,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-03-01 17:12:23,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218215355] [2022-03-01 17:12:23,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:23,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:12:23,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:23,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:12:23,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:12:23,728 INFO L87 Difference]: Start difference. First operand 34090 states and 87312 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:24,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:24,288 INFO L93 Difference]: Finished difference Result 34819 states and 88705 transitions. [2022-03-01 17:12:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:12:24,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-01 17:12:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:24,349 INFO L225 Difference]: With dead ends: 34819 [2022-03-01 17:12:24,349 INFO L226 Difference]: Without dead ends: 34769 [2022-03-01 17:12:24,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:12:24,349 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 111 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:24,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 407 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:12:24,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34769 states. [2022-03-01 17:12:25,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34769 to 34123. [2022-03-01 17:12:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34123 states, 34122 states have (on average 2.560195768126136) internal successors, (87359), 34122 states have internal predecessors, (87359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:25,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34123 states to 34123 states and 87359 transitions. [2022-03-01 17:12:25,189 INFO L78 Accepts]: Start accepts. Automaton has 34123 states and 87359 transitions. Word has length 53 [2022-03-01 17:12:25,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:25,189 INFO L470 AbstractCegarLoop]: Abstraction has 34123 states and 87359 transitions. [2022-03-01 17:12:25,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:25,189 INFO L276 IsEmpty]: Start isEmpty. Operand 34123 states and 87359 transitions. [2022-03-01 17:12:25,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:25,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:25,218 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:25,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-03-01 17:12:25,419 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,SelfDestructingSolverStorable215 [2022-03-01 17:12:25,419 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:25,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:25,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1787791666, now seen corresponding path program 110 times [2022-03-01 17:12:25,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:25,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976758406] [2022-03-01 17:12:25,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:25,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:12:25,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:25,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976758406] [2022-03-01 17:12:25,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976758406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:25,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384860217] [2022-03-01 17:12:25,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:12:25,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:25,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:25,518 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) [2022-03-01 17:12:25,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-01 17:12:25,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:12:25,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:25,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:25,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:12:25,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:25,696 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:12:25,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:12:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:12:25,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384860217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:25,819 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:25,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-01 17:12:25,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163198670] [2022-03-01 17:12:25,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:25,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:12:25,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:25,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:12:25,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:12:25,820 INFO L87 Difference]: Start difference. First operand 34123 states and 87359 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:26,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:26,494 INFO L93 Difference]: Finished difference Result 35999 states and 91258 transitions. [2022-03-01 17:12:26,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:12:26,495 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-01 17:12:26,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:26,559 INFO L225 Difference]: With dead ends: 35999 [2022-03-01 17:12:26,560 INFO L226 Difference]: Without dead ends: 35963 [2022-03-01 17:12:26,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:12:26,560 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 124 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:26,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 415 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:12:26,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35963 states. [2022-03-01 17:12:27,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35963 to 33896. [2022-03-01 17:12:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33896 states, 33895 states have (on average 2.559876087918572) internal successors, (86767), 33895 states have internal predecessors, (86767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33896 states to 33896 states and 86767 transitions. [2022-03-01 17:12:27,259 INFO L78 Accepts]: Start accepts. Automaton has 33896 states and 86767 transitions. Word has length 53 [2022-03-01 17:12:27,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:27,259 INFO L470 AbstractCegarLoop]: Abstraction has 33896 states and 86767 transitions. [2022-03-01 17:12:27,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:27,259 INFO L276 IsEmpty]: Start isEmpty. Operand 33896 states and 86767 transitions. [2022-03-01 17:12:27,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:27,286 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:27,286 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:27,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-03-01 17:12:27,487 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,SelfDestructingSolverStorable216 [2022-03-01 17:12:27,487 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:27,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:27,487 INFO L85 PathProgramCache]: Analyzing trace with hash -365258296, now seen corresponding path program 111 times [2022-03-01 17:12:27,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:27,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473394165] [2022-03-01 17:12:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:27,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:27,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:27,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473394165] [2022-03-01 17:12:27,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473394165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:27,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082437280] [2022-03-01 17:12:27,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:12:27,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:27,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:27,612 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) [2022-03-01 17:12:27,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-01 17:12:27,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-01 17:12:27,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:27,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:27,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:27,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:27,844 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:12:27,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:12:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:27,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082437280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:27,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:27,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-03-01 17:12:27,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754556003] [2022-03-01 17:12:27,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:27,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:12:27,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:27,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:12:27,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:12:27,965 INFO L87 Difference]: Start difference. First operand 33896 states and 86767 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:28,677 INFO L93 Difference]: Finished difference Result 37797 states and 95299 transitions. [2022-03-01 17:12:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:12:28,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-01 17:12:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:28,742 INFO L225 Difference]: With dead ends: 37797 [2022-03-01 17:12:28,742 INFO L226 Difference]: Without dead ends: 37785 [2022-03-01 17:12:28,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 100 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:12:28,742 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 145 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:28,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 466 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:12:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37785 states. [2022-03-01 17:12:29,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37785 to 33938. [2022-03-01 17:12:29,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33938 states, 33937 states have (on average 2.559978784217815) internal successors, (86878), 33937 states have internal predecessors, (86878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:29,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33938 states to 33938 states and 86878 transitions. [2022-03-01 17:12:29,456 INFO L78 Accepts]: Start accepts. Automaton has 33938 states and 86878 transitions. Word has length 53 [2022-03-01 17:12:29,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:29,456 INFO L470 AbstractCegarLoop]: Abstraction has 33938 states and 86878 transitions. [2022-03-01 17:12:29,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:29,457 INFO L276 IsEmpty]: Start isEmpty. Operand 33938 states and 86878 transitions. [2022-03-01 17:12:29,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:29,484 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:29,484 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:29,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-03-01 17:12:29,685 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,SelfDestructingSolverStorable217 [2022-03-01 17:12:29,685 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:29,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:29,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1975891952, now seen corresponding path program 56 times [2022-03-01 17:12:29,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:29,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458890193] [2022-03-01 17:12:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:29,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:29,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:29,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458890193] [2022-03-01 17:12:29,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458890193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:29,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234962822] [2022-03-01 17:12:29,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:12:29,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:29,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:29,787 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) [2022-03-01 17:12:29,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-01 17:12:29,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:12:29,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:29,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:29,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:30,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:30,102 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:12:30,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:12:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:30,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234962822] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:30,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:30,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-01 17:12:30,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316731797] [2022-03-01 17:12:30,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:30,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:12:30,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:30,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:12:30,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:12:30,228 INFO L87 Difference]: Start difference. First operand 33938 states and 86878 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:30,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:30,764 INFO L93 Difference]: Finished difference Result 36071 states and 91355 transitions. [2022-03-01 17:12:30,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:12:30,764 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-01 17:12:30,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:30,829 INFO L225 Difference]: With dead ends: 36071 [2022-03-01 17:12:30,829 INFO L226 Difference]: Without dead ends: 36028 [2022-03-01 17:12:30,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:12:30,830 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 185 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:30,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 459 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:12:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36028 states. [2022-03-01 17:12:31,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36028 to 33966. [2022-03-01 17:12:31,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33966 states, 33965 states have (on average 2.5602826438981303) internal successors, (86960), 33965 states have internal predecessors, (86960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33966 states to 33966 states and 86960 transitions. [2022-03-01 17:12:31,662 INFO L78 Accepts]: Start accepts. Automaton has 33966 states and 86960 transitions. Word has length 53 [2022-03-01 17:12:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:31,662 INFO L470 AbstractCegarLoop]: Abstraction has 33966 states and 86960 transitions. [2022-03-01 17:12:31,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 33966 states and 86960 transitions. [2022-03-01 17:12:31,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:31,686 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:31,686 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:31,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-03-01 17:12:31,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:31,886 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:31,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:31,887 INFO L85 PathProgramCache]: Analyzing trace with hash -196861942, now seen corresponding path program 112 times [2022-03-01 17:12:31,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:31,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834044519] [2022-03-01 17:12:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:31,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:31,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:31,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834044519] [2022-03-01 17:12:31,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834044519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:31,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850315439] [2022-03-01 17:12:31,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:12:31,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:31,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:31,994 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) [2022-03-01 17:12:31,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-01 17:12:32,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:12:32,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:32,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:32,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:32,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:32,185 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:12:32,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:12:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:32,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850315439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:32,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:32,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-03-01 17:12:32,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609970873] [2022-03-01 17:12:32,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:32,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:12:32,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:32,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:12:32,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:12:32,307 INFO L87 Difference]: Start difference. First operand 33966 states and 86960 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:32,877 INFO L93 Difference]: Finished difference Result 34769 states and 88510 transitions. [2022-03-01 17:12:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:12:32,877 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-01 17:12:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:32,945 INFO L225 Difference]: With dead ends: 34769 [2022-03-01 17:12:32,945 INFO L226 Difference]: Without dead ends: 34701 [2022-03-01 17:12:32,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:12:32,945 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 114 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:32,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 425 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:12:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34701 states. [2022-03-01 17:12:33,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34701 to 34014. [2022-03-01 17:12:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34014 states, 34013 states have (on average 2.5586687443036484) internal successors, (87028), 34013 states have internal predecessors, (87028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:33,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34014 states to 34014 states and 87028 transitions. [2022-03-01 17:12:33,735 INFO L78 Accepts]: Start accepts. Automaton has 34014 states and 87028 transitions. Word has length 53 [2022-03-01 17:12:33,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:33,735 INFO L470 AbstractCegarLoop]: Abstraction has 34014 states and 87028 transitions. [2022-03-01 17:12:33,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:33,735 INFO L276 IsEmpty]: Start isEmpty. Operand 34014 states and 87028 transitions. [2022-03-01 17:12:33,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:33,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:33,762 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:33,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-03-01 17:12:33,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:33,962 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:33,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:33,963 INFO L85 PathProgramCache]: Analyzing trace with hash -810398122, now seen corresponding path program 113 times [2022-03-01 17:12:33,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:33,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817532800] [2022-03-01 17:12:33,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:33,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:33,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:12:34,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:34,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817532800] [2022-03-01 17:12:34,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817532800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:34,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488513997] [2022-03-01 17:12:34,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:12:34,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:34,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:34,060 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) [2022-03-01 17:12:34,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-01 17:12:34,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-03-01 17:12:34,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:34,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:12:34,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:34,241 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:12:34,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:12:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-01 17:12:34,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488513997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:34,362 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:34,362 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-01 17:12:34,362 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482104623] [2022-03-01 17:12:34,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:34,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:12:34,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:34,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:12:34,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:12:34,362 INFO L87 Difference]: Start difference. First operand 34014 states and 87028 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:34,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:34,864 INFO L93 Difference]: Finished difference Result 36157 states and 91478 transitions. [2022-03-01 17:12:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:12:34,864 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-01 17:12:34,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:34,924 INFO L225 Difference]: With dead ends: 36157 [2022-03-01 17:12:34,925 INFO L226 Difference]: Without dead ends: 36109 [2022-03-01 17:12:34,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:12:34,925 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 145 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:34,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 417 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:12:34,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36109 states. [2022-03-01 17:12:35,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36109 to 33749. [2022-03-01 17:12:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33749 states, 33748 states have (on average 2.559677610525068) internal successors, (86384), 33748 states have internal predecessors, (86384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33749 states to 33749 states and 86384 transitions. [2022-03-01 17:12:35,755 INFO L78 Accepts]: Start accepts. Automaton has 33749 states and 86384 transitions. Word has length 53 [2022-03-01 17:12:35,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:35,755 INFO L470 AbstractCegarLoop]: Abstraction has 33749 states and 86384 transitions. [2022-03-01 17:12:35,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:35,755 INFO L276 IsEmpty]: Start isEmpty. Operand 33749 states and 86384 transitions. [2022-03-01 17:12:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:35,782 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:35,782 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:35,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-03-01 17:12:35,982 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,SelfDestructingSolverStorable220 [2022-03-01 17:12:35,983 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:35,983 INFO L85 PathProgramCache]: Analyzing trace with hash -935076116, now seen corresponding path program 114 times [2022-03-01 17:12:35,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:35,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566171669] [2022-03-01 17:12:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:35,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:36,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:36,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566171669] [2022-03-01 17:12:36,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566171669] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:36,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652012025] [2022-03-01 17:12:36,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:12:36,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:36,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:36,082 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) [2022-03-01 17:12:36,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-01 17:12:36,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-01 17:12:36,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:36,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-01 17:12:36,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 41 proven. 90 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:36,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:36,599 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:12:36,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:12:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 95 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:36,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652012025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:36,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:36,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 26 [2022-03-01 17:12:36,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800177036] [2022-03-01 17:12:36,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:36,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:12:36,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:36,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:12:36,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:12:36,775 INFO L87 Difference]: Start difference. First operand 33749 states and 86384 transitions. Second operand has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:41,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:41,140 INFO L93 Difference]: Finished difference Result 68924 states and 174961 transitions. [2022-03-01 17:12:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-03-01 17:12:41,141 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-01 17:12:41,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:41,277 INFO L225 Difference]: With dead ends: 68924 [2022-03-01 17:12:41,278 INFO L226 Difference]: Without dead ends: 68898 [2022-03-01 17:12:41,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 179 SyntacticMatches, 40 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14259 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4435, Invalid=20371, Unknown=0, NotChecked=0, Total=24806 [2022-03-01 17:12:41,279 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 691 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 3489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1282 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:41,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 1004 Invalid, 3489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2126 Invalid, 0 Unknown, 1282 Unchecked, 0.8s Time] [2022-03-01 17:12:41,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68898 states. [2022-03-01 17:12:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68898 to 36585. [2022-03-01 17:12:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36585 states, 36584 states have (on average 2.5490104963918654) internal successors, (93253), 36584 states have internal predecessors, (93253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36585 states to 36585 states and 93253 transitions. [2022-03-01 17:12:42,454 INFO L78 Accepts]: Start accepts. Automaton has 36585 states and 93253 transitions. Word has length 53 [2022-03-01 17:12:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:42,454 INFO L470 AbstractCegarLoop]: Abstraction has 36585 states and 93253 transitions. [2022-03-01 17:12:42,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 36585 states and 93253 transitions. [2022-03-01 17:12:42,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:42,485 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:42,485 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:42,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-03-01 17:12:42,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-03-01 17:12:42,686 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:42,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:42,687 INFO L85 PathProgramCache]: Analyzing trace with hash -310420104, now seen corresponding path program 115 times [2022-03-01 17:12:42,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:42,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985864745] [2022-03-01 17:12:42,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:42,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:42,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:42,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985864745] [2022-03-01 17:12:42,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985864745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:42,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777138583] [2022-03-01 17:12:42,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:12:42,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:42,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:42,785 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) [2022-03-01 17:12:42,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-01 17:12:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:42,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:42,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:42,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:42,981 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:12:42,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:12:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:43,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777138583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:43,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:43,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-03-01 17:12:43,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165366385] [2022-03-01 17:12:43,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:43,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:12:43,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:43,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:12:43,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:12:43,098 INFO L87 Difference]: Start difference. First operand 36585 states and 93253 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:43,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:43,910 INFO L93 Difference]: Finished difference Result 40804 states and 102537 transitions. [2022-03-01 17:12:43,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:12:43,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-01 17:12:43,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:43,983 INFO L225 Difference]: With dead ends: 40804 [2022-03-01 17:12:43,983 INFO L226 Difference]: Without dead ends: 40762 [2022-03-01 17:12:43,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 100 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:12:43,984 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 223 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:43,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 549 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:12:44,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40762 states. [2022-03-01 17:12:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40762 to 36523. [2022-03-01 17:12:44,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36523 states, 36522 states have (on average 2.5495044083018454) internal successors, (93113), 36522 states have internal predecessors, (93113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36523 states to 36523 states and 93113 transitions. [2022-03-01 17:12:44,906 INFO L78 Accepts]: Start accepts. Automaton has 36523 states and 93113 transitions. Word has length 53 [2022-03-01 17:12:44,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:44,906 INFO L470 AbstractCegarLoop]: Abstraction has 36523 states and 93113 transitions. [2022-03-01 17:12:44,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 36523 states and 93113 transitions. [2022-03-01 17:12:44,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:44,936 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:44,936 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:44,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-03-01 17:12:45,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:45,139 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:45,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1486355746, now seen corresponding path program 116 times [2022-03-01 17:12:45,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:45,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012565814] [2022-03-01 17:12:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:45,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:45,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:45,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012565814] [2022-03-01 17:12:45,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012565814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:45,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013736199] [2022-03-01 17:12:45,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:12:45,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:45,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:45,277 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) [2022-03-01 17:12:45,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-01 17:12:45,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:12:45,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:45,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:45,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:45,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:45,487 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-01 17:12:45,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:12:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:12:45,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013736199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:45,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:45,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-03-01 17:12:45,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011776757] [2022-03-01 17:12:45,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:45,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:12:45,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:45,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:12:45,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:12:45,598 INFO L87 Difference]: Start difference. First operand 36523 states and 93113 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:46,300 INFO L93 Difference]: Finished difference Result 41366 states and 103940 transitions. [2022-03-01 17:12:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:12:46,301 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-01 17:12:46,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:46,375 INFO L225 Difference]: With dead ends: 41366 [2022-03-01 17:12:46,375 INFO L226 Difference]: Without dead ends: 41312 [2022-03-01 17:12:46,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:12:46,376 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 206 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:46,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 551 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:12:46,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41312 states. [2022-03-01 17:12:47,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41312 to 36458. [2022-03-01 17:12:47,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36458 states, 36457 states have (on average 2.549222371561017) internal successors, (92937), 36457 states have internal predecessors, (92937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36458 states to 36458 states and 92937 transitions. [2022-03-01 17:12:47,257 INFO L78 Accepts]: Start accepts. Automaton has 36458 states and 92937 transitions. Word has length 53 [2022-03-01 17:12:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:47,258 INFO L470 AbstractCegarLoop]: Abstraction has 36458 states and 92937 transitions. [2022-03-01 17:12:47,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand 36458 states and 92937 transitions. [2022-03-01 17:12:47,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:47,287 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:47,287 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:47,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-03-01 17:12:47,487 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,SelfDestructingSolverStorable223 [2022-03-01 17:12:47,487 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:47,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:47,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1090441140, now seen corresponding path program 57 times [2022-03-01 17:12:47,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:47,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718152780] [2022-03-01 17:12:47,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:47,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:47,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:47,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718152780] [2022-03-01 17:12:47,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718152780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:47,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520222136] [2022-03-01 17:12:47,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:12:47,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:47,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:47,587 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) [2022-03-01 17:12:47,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-01 17:12:47,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-01 17:12:47,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:47,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:47,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:47,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:47,779 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:12:47,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:12:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:47,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520222136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:47,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:47,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-01 17:12:47,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319191850] [2022-03-01 17:12:47,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:47,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:12:47,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:47,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:12:47,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:12:47,903 INFO L87 Difference]: Start difference. First operand 36458 states and 92937 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:12:48,586 INFO L93 Difference]: Finished difference Result 38744 states and 97778 transitions. [2022-03-01 17:12:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:12:48,587 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-01 17:12:48,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:12:48,656 INFO L225 Difference]: With dead ends: 38744 [2022-03-01 17:12:48,656 INFO L226 Difference]: Without dead ends: 38709 [2022-03-01 17:12:48,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:12:48,657 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 182 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:12:48,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 411 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:12:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38709 states. [2022-03-01 17:12:49,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38709 to 36349. [2022-03-01 17:12:49,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36349 states, 36348 states have (on average 2.549576317816661) internal successors, (92672), 36348 states have internal predecessors, (92672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36349 states to 36349 states and 92672 transitions. [2022-03-01 17:12:49,432 INFO L78 Accepts]: Start accepts. Automaton has 36349 states and 92672 transitions. Word has length 53 [2022-03-01 17:12:49,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:12:49,432 INFO L470 AbstractCegarLoop]: Abstraction has 36349 states and 92672 transitions. [2022-03-01 17:12:49,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:12:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 36349 states and 92672 transitions. [2022-03-01 17:12:49,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-01 17:12:49,463 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:12:49,463 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:12:49,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-03-01 17:12:49,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-03-01 17:12:49,663 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:12:49,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:12:49,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1031772262, now seen corresponding path program 117 times [2022-03-01 17:12:49,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:12:49,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252668408] [2022-03-01 17:12:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:12:49,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:12:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:12:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:49,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:12:49,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252668408] [2022-03-01 17:12:49,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252668408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:12:49,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673656474] [2022-03-01 17:12:49,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:12:49,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:12:49,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:12:49,780 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) [2022-03-01 17:12:49,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-01 17:12:49,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-01 17:12:49,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:12:49,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:12:49,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:12:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:49,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:12:49,998 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:12:49,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-03-01 17:12:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:12:50,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673656474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:12:50,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:12:50,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-03-01 17:12:50,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143887140] [2022-03-01 17:12:50,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:12:50,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:12:50,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:12:50,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:12:50,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:12:50,242 INFO L87 Difference]: Start difference. First operand 36349 states and 92672 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)