/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 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 11:57:36,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 11:57:36,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 11:57:36,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 11:57:36,226 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 [2021-08-21 11:57:36,265 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 11:57:36,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 11:57:36,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 11:57:36,266 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 11:57:36,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 11:57:36,269 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 11:57:36,269 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 11:57:36,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 11:57:36,269 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 11:57:36,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 11:57:36,270 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 11:57:36,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 11:57:36,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 11:57:36,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 11:57:36,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 11:57:36,271 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 11:57:36,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 11:57:36,271 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 11:57:36,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 11:57:36,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 11:57:36,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 11:57:36,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 11:57:36,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 11:57:36,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:57:36,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 11:57:36,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 11:57:36,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 11:57:36,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 11:57:36,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 11:57:36,273 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 11:57:36,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 11:57:36,273 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 11:57:36,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 11:57:36,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 11:57:36,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 11:57:36,667 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 11:57:36,668 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 11:57:36,669 INFO L432 ainManager$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 [2021-08-21 11:57:36,686 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl' [2021-08-21 11:57:36,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 11:57:36,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 11:57:36,736 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 11:57:36,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 11:57:36,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 11:57:36,751 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 21.08 11:57:36" (1/1) ... [2021-08-21 11:57:36,761 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 21.08 11:57:36" (1/1) ... [2021-08-21 11:57:36,769 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 11:57:36,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 11:57:36,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 11:57:36,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 11:57:36,779 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 21.08 11:57:36" (1/1) ... [2021-08-21 11:57:36,780 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 21.08 11:57:36" (1/1) ... [2021-08-21 11:57:36,780 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 21.08 11:57:36" (1/1) ... [2021-08-21 11:57:36,781 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 21.08 11:57:36" (1/1) ... [2021-08-21 11:57:36,783 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 21.08 11:57:36" (1/1) ... [2021-08-21 11:57:36,786 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 21.08 11:57:36" (1/1) ... [2021-08-21 11:57:36,787 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 21.08 11:57:36" (1/1) ... [2021-08-21 11:57:36,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 11:57:36,789 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 11:57:36,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 11:57:36,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 11:57:36,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:36" (1/1) ... [2021-08-21 11:57:36,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:57:36,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:36,822 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) [2021-08-21 11:57:36,833 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 [2021-08-21 11:57:36,863 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 11:57:36,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 11:57:36,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 11:57:36,863 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 11:57:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 11:57:36,864 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 11:57:36,864 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 11:57:36,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 11:57:36,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 11:57:36,865 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 11:57:36,999 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 11:57:37,000 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 11:57:37,001 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:57:37 BoogieIcfgContainer [2021-08-21 11:57:37,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 11:57:37,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 11:57:37,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 11:57:37,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 11:57:37,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 11:57:36" (1/2) ... [2021-08-21 11:57:37,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2be919 and model type array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:57:37, skipping insertion in model container [2021-08-21 11:57:37,007 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 21.08 11:57:37" (2/2) ... [2021-08-21 11:57:37,010 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.bpl [2021-08-21 11:57:37,017 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 11:57:37,018 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 11:57:37,018 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 11:57:37,018 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 11:57:37,058 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 11:57:37,096 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 11:57:37,102 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 11:57:37,102 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 11:57:37,123 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 66 flow [2021-08-21 11:57:37,146 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) [2021-08-21 11:57:37,148 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) [2021-08-21 11:57:37,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 11:57:37,171 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:37,171 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:37,172 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:37,176 INFO L82 PathProgramCache]: Analyzing trace with hash -167955401, now seen corresponding path program 1 times [2021-08-21 11:57:37,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:37,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899778265] [2021-08-21 11:57:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:37,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:37,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:37,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899778265] [2021-08-21 11:57:37,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899778265] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:37,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:37,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 11:57:37,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255536130] [2021-08-21 11:57:37,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 11:57:37,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:37,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 11:57:37,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 11:57:37,406 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) [2021-08-21 11:57:37,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:37,478 INFO L93 Difference]: Finished difference Result 102 states and 226 transitions. [2021-08-21 11:57:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 11:57:37,480 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 [2021-08-21 11:57:37,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:37,489 INFO L225 Difference]: With dead ends: 102 [2021-08-21 11:57:37,489 INFO L226 Difference]: Without dead ends: 95 [2021-08-21 11:57:37,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 11:57:37,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-08-21 11:57:37,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-08-21 11:57:37,523 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) [2021-08-21 11:57:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 185 transitions. [2021-08-21 11:57:37,526 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 185 transitions. Word has length 11 [2021-08-21 11:57:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:37,526 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 185 transitions. [2021-08-21 11:57:37,526 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) [2021-08-21 11:57:37,527 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 185 transitions. [2021-08-21 11:57:37,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:37,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:37,528 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:37,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 11:57:37,529 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:37,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1051815822, now seen corresponding path program 1 times [2021-08-21 11:57:37,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:37,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214895150] [2021-08-21 11:57:37,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:37,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:37,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:37,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214895150] [2021-08-21 11:57:37,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214895150] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:37,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:37,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 11:57:37,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745454040] [2021-08-21 11:57:37,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 11:57:37,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:37,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 11:57:37,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 11:57:37,649 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) [2021-08-21 11:57:37,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:37,706 INFO L93 Difference]: Finished difference Result 128 states and 286 transitions. [2021-08-21 11:57:37,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 11:57:37,707 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 [2021-08-21 11:57:37,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:37,711 INFO L225 Difference]: With dead ends: 128 [2021-08-21 11:57:37,711 INFO L226 Difference]: Without dead ends: 128 [2021-08-21 11:57:37,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 11:57:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-21 11:57:37,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 89. [2021-08-21 11:57:37,725 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) [2021-08-21 11:57:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 204 transitions. [2021-08-21 11:57:37,726 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 204 transitions. Word has length 14 [2021-08-21 11:57:37,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:37,727 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 204 transitions. [2021-08-21 11:57:37,727 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) [2021-08-21 11:57:37,727 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 204 transitions. [2021-08-21 11:57:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:37,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:37,728 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:37,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 11:57:37,730 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:37,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:37,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1207263346, now seen corresponding path program 2 times [2021-08-21 11:57:37,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:37,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172128578] [2021-08-21 11:57:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:37,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:37,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:37,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172128578] [2021-08-21 11:57:37,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172128578] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:37,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:37,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 11:57:37,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547868855] [2021-08-21 11:57:37,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:37,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:37,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:37,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:37,829 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) [2021-08-21 11:57:37,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:37,895 INFO L93 Difference]: Finished difference Result 152 states and 327 transitions. [2021-08-21 11:57:37,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:57:37,896 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 [2021-08-21 11:57:37,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:37,898 INFO L225 Difference]: With dead ends: 152 [2021-08-21 11:57:37,898 INFO L226 Difference]: Without dead ends: 152 [2021-08-21 11:57:37,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:37,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-21 11:57:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 94. [2021-08-21 11:57:37,922 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) [2021-08-21 11:57:37,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 215 transitions. [2021-08-21 11:57:37,923 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 215 transitions. Word has length 14 [2021-08-21 11:57:37,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:37,923 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 215 transitions. [2021-08-21 11:57:37,923 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) [2021-08-21 11:57:37,923 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 215 transitions. [2021-08-21 11:57:37,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:37,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:37,924 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:37,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 11:57:37,924 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:37,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:37,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1376889075, now seen corresponding path program 1 times [2021-08-21 11:57:37,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:37,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488692182] [2021-08-21 11:57:37,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:37,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:37,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:37,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488692182] [2021-08-21 11:57:37,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488692182] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:37,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:37,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 11:57:37,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322814883] [2021-08-21 11:57:37,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 11:57:37,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:37,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 11:57:37,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 11:57:37,981 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) [2021-08-21 11:57:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:38,028 INFO L93 Difference]: Finished difference Result 138 states and 314 transitions. [2021-08-21 11:57:38,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 11:57:38,029 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 [2021-08-21 11:57:38,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:38,030 INFO L225 Difference]: With dead ends: 138 [2021-08-21 11:57:38,030 INFO L226 Difference]: Without dead ends: 130 [2021-08-21 11:57:38,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:38,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-21 11:57:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 100. [2021-08-21 11:57:38,036 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) [2021-08-21 11:57:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 227 transitions. [2021-08-21 11:57:38,037 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 227 transitions. Word has length 14 [2021-08-21 11:57:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:38,037 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 227 transitions. [2021-08-21 11:57:38,037 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) [2021-08-21 11:57:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 227 transitions. [2021-08-21 11:57:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:38,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:38,039 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:38,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 11:57:38,039 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:38,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:38,040 INFO L82 PathProgramCache]: Analyzing trace with hash 633913395, now seen corresponding path program 2 times [2021-08-21 11:57:38,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:38,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052136073] [2021-08-21 11:57:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:38,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:38,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:38,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052136073] [2021-08-21 11:57:38,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052136073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:38,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614807657] [2021-08-21 11:57:38,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:57:38,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:38,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:38,113 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) [2021-08-21 11:57:38,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 11:57:38,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:57:38,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:38,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 11:57:38,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:38,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614807657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:38,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:38,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 11:57:38,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006828917] [2021-08-21 11:57:38,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:57:38,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:38,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:57:38,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:57:38,418 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) [2021-08-21 11:57:38,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:38,495 INFO L93 Difference]: Finished difference Result 150 states and 346 transitions. [2021-08-21 11:57:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:57:38,495 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 [2021-08-21 11:57:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:38,496 INFO L225 Difference]: With dead ends: 150 [2021-08-21 11:57:38,497 INFO L226 Difference]: Without dead ends: 150 [2021-08-21 11:57:38,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-21 11:57:38,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 103. [2021-08-21 11:57:38,502 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) [2021-08-21 11:57:38,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 234 transitions. [2021-08-21 11:57:38,503 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 234 transitions. Word has length 14 [2021-08-21 11:57:38,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:38,503 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 234 transitions. [2021-08-21 11:57:38,503 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) [2021-08-21 11:57:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 234 transitions. [2021-08-21 11:57:38,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 11:57:38,509 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:38,509 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:38,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 11:57:38,733 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 [2021-08-21 11:57:38,733 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:38,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:38,734 INFO L82 PathProgramCache]: Analyzing trace with hash 56537190, now seen corresponding path program 3 times [2021-08-21 11:57:38,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:38,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769157842] [2021-08-21 11:57:38,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:38,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:38,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:38,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769157842] [2021-08-21 11:57:38,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769157842] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:38,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:38,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 11:57:38,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812110555] [2021-08-21 11:57:38,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 11:57:38,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:38,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 11:57:38,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 11:57:38,834 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) [2021-08-21 11:57:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:38,873 INFO L93 Difference]: Finished difference Result 134 states and 303 transitions. [2021-08-21 11:57:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 11:57:38,874 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 [2021-08-21 11:57:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:38,875 INFO L225 Difference]: With dead ends: 134 [2021-08-21 11:57:38,876 INFO L226 Difference]: Without dead ends: 132 [2021-08-21 11:57:38,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:38,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-08-21 11:57:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 103. [2021-08-21 11:57:38,880 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) [2021-08-21 11:57:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2021-08-21 11:57:38,881 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 14 [2021-08-21 11:57:38,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:38,881 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2021-08-21 11:57:38,881 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) [2021-08-21 11:57:38,882 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2021-08-21 11:57:38,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:57:38,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:38,882 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:38,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 11:57:38,883 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:38,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:38,883 INFO L82 PathProgramCache]: Analyzing trace with hash -2012435128, now seen corresponding path program 1 times [2021-08-21 11:57:38,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:38,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765180491] [2021-08-21 11:57:38,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:38,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:38,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:38,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765180491] [2021-08-21 11:57:38,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765180491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:38,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271145995] [2021-08-21 11:57:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:38,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:38,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:38,937 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) [2021-08-21 11:57:38,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 11:57:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:38,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:57:38,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:39,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271145995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:39,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:39,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-08-21 11:57:39,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801714646] [2021-08-21 11:57:39,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:57:39,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:39,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:57:39,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:39,145 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) [2021-08-21 11:57:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:39,275 INFO L93 Difference]: Finished difference Result 300 states and 674 transitions. [2021-08-21 11:57:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:57:39,276 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 [2021-08-21 11:57:39,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:39,279 INFO L225 Difference]: With dead ends: 300 [2021-08-21 11:57:39,279 INFO L226 Difference]: Without dead ends: 286 [2021-08-21 11:57:39,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:39,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-21 11:57:39,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2021-08-21 11:57:39,291 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) [2021-08-21 11:57:39,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2021-08-21 11:57:39,293 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 17 [2021-08-21 11:57:39,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:39,294 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2021-08-21 11:57:39,295 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) [2021-08-21 11:57:39,295 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2021-08-21 11:57:39,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:57:39,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:39,296 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:39,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:39,516 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 [2021-08-21 11:57:39,517 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:39,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:39,517 INFO L82 PathProgramCache]: Analyzing trace with hash 617878888, now seen corresponding path program 1 times [2021-08-21 11:57:39,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:39,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423075668] [2021-08-21 11:57:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:39,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:39,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:39,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423075668] [2021-08-21 11:57:39,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423075668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:39,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158277948] [2021-08-21 11:57:39,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:39,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:39,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:39,599 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) [2021-08-21 11:57:39,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 11:57:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:39,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:57:39,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:39,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158277948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:39,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:39,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-08-21 11:57:39,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764188415] [2021-08-21 11:57:39,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:57:39,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:39,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:57:39,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:39,795 INFO L87 Difference]: Start difference. First operand 143 states and 334 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) [2021-08-21 11:57:39,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:39,880 INFO L93 Difference]: Finished difference Result 248 states and 569 transitions. [2021-08-21 11:57:39,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:57:39,880 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 17 [2021-08-21 11:57:39,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:39,882 INFO L225 Difference]: With dead ends: 248 [2021-08-21 11:57:39,882 INFO L226 Difference]: Without dead ends: 248 [2021-08-21 11:57:39,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:57:39,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-21 11:57:39,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 194. [2021-08-21 11:57:39,891 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) [2021-08-21 11:57:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2021-08-21 11:57:39,892 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 17 [2021-08-21 11:57:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:39,893 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2021-08-21 11:57:39,893 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) [2021-08-21 11:57:39,893 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2021-08-21 11:57:39,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:57:39,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:39,894 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:39,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:40,119 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 [2021-08-21 11:57:40,119 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:40,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:40,120 INFO L82 PathProgramCache]: Analyzing trace with hash 456277538, now seen corresponding path program 2 times [2021-08-21 11:57:40,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:40,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623469226] [2021-08-21 11:57:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:40,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:57:40,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:40,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623469226] [2021-08-21 11:57:40,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623469226] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:40,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:40,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 11:57:40,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378100957] [2021-08-21 11:57:40,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 11:57:40,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:40,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 11:57:40,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 11:57:40,183 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) [2021-08-21 11:57:40,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:40,224 INFO L93 Difference]: Finished difference Result 311 states and 725 transitions. [2021-08-21 11:57:40,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 11:57:40,225 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 [2021-08-21 11:57:40,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:40,227 INFO L225 Difference]: With dead ends: 311 [2021-08-21 11:57:40,228 INFO L226 Difference]: Without dead ends: 304 [2021-08-21 11:57:40,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 11:57:40,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-08-21 11:57:40,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-08-21 11:57:40,237 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) [2021-08-21 11:57:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 620 transitions. [2021-08-21 11:57:40,241 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 620 transitions. Word has length 17 [2021-08-21 11:57:40,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:40,241 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 620 transitions. [2021-08-21 11:57:40,241 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) [2021-08-21 11:57:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 620 transitions. [2021-08-21 11:57:40,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:57:40,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:40,242 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:40,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 11:57:40,243 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:40,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:40,243 INFO L82 PathProgramCache]: Analyzing trace with hash 614663528, now seen corresponding path program 1 times [2021-08-21 11:57:40,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:40,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030566763] [2021-08-21 11:57:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:40,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:40,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:40,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030566763] [2021-08-21 11:57:40,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030566763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:40,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584914412] [2021-08-21 11:57:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:40,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:40,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:40,297 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) [2021-08-21 11:57:40,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 11:57:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:40,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:57:40,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:40,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584914412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:40,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:40,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-08-21 11:57:40,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774538527] [2021-08-21 11:57:40,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:57:40,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:40,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:57:40,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:57:40,501 INFO L87 Difference]: Start difference. First operand 252 states and 620 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) [2021-08-21 11:57:40,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:40,559 INFO L93 Difference]: Finished difference Result 243 states and 574 transitions. [2021-08-21 11:57:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 11:57:40,560 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 17 [2021-08-21 11:57:40,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:40,561 INFO L225 Difference]: With dead ends: 243 [2021-08-21 11:57:40,561 INFO L226 Difference]: Without dead ends: 208 [2021-08-21 11:57:40,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-08-21 11:57:40,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-08-21 11:57:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.4009661835748792) internal successors, (497), 207 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 497 transitions. [2021-08-21 11:57:40,573 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 497 transitions. Word has length 17 [2021-08-21 11:57:40,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:40,574 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 497 transitions. [2021-08-21 11:57:40,575 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) [2021-08-21 11:57:40,576 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 497 transitions. [2021-08-21 11:57:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 11:57:40,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:40,577 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:40,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:40,800 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 [2021-08-21 11:57:40,801 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:40,801 INFO L82 PathProgramCache]: Analyzing trace with hash -38242968, now seen corresponding path program 2 times [2021-08-21 11:57:40,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:40,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030487879] [2021-08-21 11:57:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:40,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:40,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:40,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030487879] [2021-08-21 11:57:40,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030487879] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:40,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:40,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 11:57:40,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586737983] [2021-08-21 11:57:40,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:40,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:40,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:40,865 INFO L87 Difference]: Start difference. First operand 208 states and 497 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) [2021-08-21 11:57:40,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:40,913 INFO L93 Difference]: Finished difference Result 222 states and 527 transitions. [2021-08-21 11:57:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:57:40,914 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 [2021-08-21 11:57:40,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:40,915 INFO L225 Difference]: With dead ends: 222 [2021-08-21 11:57:40,915 INFO L226 Difference]: Without dead ends: 222 [2021-08-21 11:57:40,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:57:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-08-21 11:57:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-08-21 11:57:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3846153846153846) internal successors, (527), 221 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 527 transitions. [2021-08-21 11:57:40,922 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 527 transitions. Word has length 17 [2021-08-21 11:57:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:40,924 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 527 transitions. [2021-08-21 11:57:40,924 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) [2021-08-21 11:57:40,924 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 527 transitions. [2021-08-21 11:57:40,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:57:40,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:40,925 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:40,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 11:57:40,925 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:40,926 INFO L82 PathProgramCache]: Analyzing trace with hash 417389902, now seen corresponding path program 3 times [2021-08-21 11:57:40,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:40,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023267154] [2021-08-21 11:57:40,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:40,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:40,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:40,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023267154] [2021-08-21 11:57:40,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023267154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:40,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769704660] [2021-08-21 11:57:40,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:57:40,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:40,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:40,993 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) [2021-08-21 11:57:41,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 11:57:41,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:57:41,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:41,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:57:41,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:41,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769704660] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:41,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 11:57:41,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-08-21 11:57:41,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386188996] [2021-08-21 11:57:41,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:57:41,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:41,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:57:41,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:57:41,660 INFO L87 Difference]: Start difference. First operand 222 states and 527 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) [2021-08-21 11:57:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:41,881 INFO L93 Difference]: Finished difference Result 421 states and 987 transitions. [2021-08-21 11:57:41,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:57:41,881 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 [2021-08-21 11:57:41,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:41,883 INFO L225 Difference]: With dead ends: 421 [2021-08-21 11:57:41,884 INFO L226 Difference]: Without dead ends: 414 [2021-08-21 11:57:41,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:57:41,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-21 11:57:41,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 278. [2021-08-21 11:57:41,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:41,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-08-21 11:57:41,892 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 20 [2021-08-21 11:57:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:41,893 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-08-21 11:57:41,893 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) [2021-08-21 11:57:41,893 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-08-21 11:57:41,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:57:41,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:41,894 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:41,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:42,120 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 [2021-08-21 11:57:42,120 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:42,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1841689266, now seen corresponding path program 4 times [2021-08-21 11:57:42,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:42,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247014904] [2021-08-21 11:57:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:42,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:42,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:42,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247014904] [2021-08-21 11:57:42,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247014904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:42,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164418946] [2021-08-21 11:57:42,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:57:42,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:42,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:42,215 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) [2021-08-21 11:57:42,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 11:57:42,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:57:42,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:42,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:57:42,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:42,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164418946] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:42,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 11:57:42,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-08-21 11:57:42,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686608130] [2021-08-21 11:57:42,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:57:42,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:42,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:57:42,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:42,602 INFO L87 Difference]: Start difference. First operand 278 states and 669 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) [2021-08-21 11:57:42,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:42,715 INFO L93 Difference]: Finished difference Result 592 states and 1376 transitions. [2021-08-21 11:57:42,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:57:42,716 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 [2021-08-21 11:57:42,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:42,719 INFO L225 Difference]: With dead ends: 592 [2021-08-21 11:57:42,719 INFO L226 Difference]: Without dead ends: 592 [2021-08-21 11:57:42,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:57:42,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-08-21 11:57:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 376. [2021-08-21 11:57:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.541333333333333) internal successors, (953), 375 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:42,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 953 transitions. [2021-08-21 11:57:42,732 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 953 transitions. Word has length 20 [2021-08-21 11:57:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:42,732 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 953 transitions. [2021-08-21 11:57:42,732 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) [2021-08-21 11:57:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 953 transitions. [2021-08-21 11:57:42,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:57:42,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:42,733 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:42,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:42,956 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 [2021-08-21 11:57:42,957 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:42,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:42,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1408864728, now seen corresponding path program 5 times [2021-08-21 11:57:42,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:42,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079963131] [2021-08-21 11:57:42,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:42,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:43,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:43,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079963131] [2021-08-21 11:57:43,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079963131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:43,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818279658] [2021-08-21 11:57:43,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:57:43,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:43,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:43,048 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) [2021-08-21 11:57:43,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 11:57:43,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:57:43,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:43,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:57:43,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:43,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818279658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:43,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:43,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-08-21 11:57:43,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020661252] [2021-08-21 11:57:43,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:57:43,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:43,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:57:43,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:57:43,361 INFO L87 Difference]: Start difference. First operand 376 states and 953 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) [2021-08-21 11:57:43,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:43,540 INFO L93 Difference]: Finished difference Result 751 states and 1816 transitions. [2021-08-21 11:57:43,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:57:43,540 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 [2021-08-21 11:57:43,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:43,544 INFO L225 Difference]: With dead ends: 751 [2021-08-21 11:57:43,545 INFO L226 Difference]: Without dead ends: 751 [2021-08-21 11:57:43,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:57:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-08-21 11:57:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 527. [2021-08-21 11:57:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.659695817490494) internal successors, (1399), 526 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:43,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1399 transitions. [2021-08-21 11:57:43,566 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1399 transitions. Word has length 20 [2021-08-21 11:57:43,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:43,566 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 1399 transitions. [2021-08-21 11:57:43,566 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) [2021-08-21 11:57:43,566 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1399 transitions. [2021-08-21 11:57:43,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:57:43,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:43,568 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:43,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:43,768 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 [2021-08-21 11:57:43,769 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:43,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:43,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2078534299, now seen corresponding path program 6 times [2021-08-21 11:57:43,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:43,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574774825] [2021-08-21 11:57:43,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:43,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:43,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:43,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574774825] [2021-08-21 11:57:43,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574774825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:43,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499920137] [2021-08-21 11:57:43,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:57:43,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:43,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:43,843 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) [2021-08-21 11:57:43,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 11:57:43,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:57:43,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:43,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:57:43,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:44,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499920137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:44,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:44,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 11:57:44,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951986181] [2021-08-21 11:57:44,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:57:44,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:57:44,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:44,115 INFO L87 Difference]: Start difference. First operand 527 states and 1399 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) [2021-08-21 11:57:44,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:44,220 INFO L93 Difference]: Finished difference Result 960 states and 2485 transitions. [2021-08-21 11:57:44,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:57:44,221 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 [2021-08-21 11:57:44,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:44,226 INFO L225 Difference]: With dead ends: 960 [2021-08-21 11:57:44,226 INFO L226 Difference]: Without dead ends: 956 [2021-08-21 11:57:44,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:57:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-08-21 11:57:44,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 785. [2021-08-21 11:57:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.752551020408163) internal successors, (2158), 784 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2158 transitions. [2021-08-21 11:57:44,256 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2158 transitions. Word has length 20 [2021-08-21 11:57:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:44,256 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2158 transitions. [2021-08-21 11:57:44,256 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) [2021-08-21 11:57:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2158 transitions. [2021-08-21 11:57:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:57:44,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:44,258 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:44,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:44,482 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 [2021-08-21 11:57:44,483 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:44,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:44,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1456653889, now seen corresponding path program 7 times [2021-08-21 11:57:44,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:44,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614494813] [2021-08-21 11:57:44,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:44,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:44,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:44,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614494813] [2021-08-21 11:57:44,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614494813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:44,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634694968] [2021-08-21 11:57:44,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:57:44,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:44,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:44,546 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) [2021-08-21 11:57:44,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 11:57:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:44,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:57:44,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:44,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634694968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:44,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:44,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 11:57:44,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151245540] [2021-08-21 11:57:44,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:57:44,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:44,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:57:44,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:44,805 INFO L87 Difference]: Start difference. First operand 785 states and 2158 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) [2021-08-21 11:57:44,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:44,942 INFO L93 Difference]: Finished difference Result 966 states and 2482 transitions. [2021-08-21 11:57:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:57:44,943 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 [2021-08-21 11:57:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:44,948 INFO L225 Difference]: With dead ends: 966 [2021-08-21 11:57:44,948 INFO L226 Difference]: Without dead ends: 966 [2021-08-21 11:57:44,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:44,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-08-21 11:57:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 785. [2021-08-21 11:57:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.739795918367347) internal successors, (2148), 784 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:44,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2148 transitions. [2021-08-21 11:57:44,974 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2148 transitions. Word has length 20 [2021-08-21 11:57:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:44,974 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 2148 transitions. [2021-08-21 11:57:44,974 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) [2021-08-21 11:57:44,974 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2148 transitions. [2021-08-21 11:57:44,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:57:44,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:44,976 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:45,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:45,194 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 [2021-08-21 11:57:45,194 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:45,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:45,195 INFO L82 PathProgramCache]: Analyzing trace with hash 524837442, now seen corresponding path program 8 times [2021-08-21 11:57:45,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:45,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345612513] [2021-08-21 11:57:45,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:45,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:45,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:45,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345612513] [2021-08-21 11:57:45,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345612513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:45,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230302347] [2021-08-21 11:57:45,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:57:45,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:45,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:45,249 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) [2021-08-21 11:57:45,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 11:57:45,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:57:45,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:45,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:57:45,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:45,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230302347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:45,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:45,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 11:57:45,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478821769] [2021-08-21 11:57:45,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:57:45,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:45,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:57:45,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:57:45,532 INFO L87 Difference]: Start difference. First operand 785 states and 2148 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) [2021-08-21 11:57:45,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:45,613 INFO L93 Difference]: Finished difference Result 861 states and 2300 transitions. [2021-08-21 11:57:45,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:57:45,613 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 [2021-08-21 11:57:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:45,618 INFO L225 Difference]: With dead ends: 861 [2021-08-21 11:57:45,618 INFO L226 Difference]: Without dead ends: 858 [2021-08-21 11:57:45,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:45,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-08-21 11:57:45,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 781. [2021-08-21 11:57:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 2.7346153846153847) internal successors, (2133), 780 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2133 transitions. [2021-08-21 11:57:45,658 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2133 transitions. Word has length 20 [2021-08-21 11:57:45,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:45,658 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 2133 transitions. [2021-08-21 11:57:45,658 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) [2021-08-21 11:57:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2133 transitions. [2021-08-21 11:57:45,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:57:45,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:45,660 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:45,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:45,880 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 [2021-08-21 11:57:45,881 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:45,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:45,881 INFO L82 PathProgramCache]: Analyzing trace with hash -855067826, now seen corresponding path program 9 times [2021-08-21 11:57:45,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:45,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970852724] [2021-08-21 11:57:45,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:45,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:45,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:45,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970852724] [2021-08-21 11:57:45,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970852724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:45,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257647099] [2021-08-21 11:57:45,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:57:45,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:45,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:45,936 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) [2021-08-21 11:57:45,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 11:57:46,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:57:46,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:46,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:57:46,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:46,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257647099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:46,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:46,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 11:57:46,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551551767] [2021-08-21 11:57:46,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:57:46,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:46,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:57:46,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:57:46,241 INFO L87 Difference]: Start difference. First operand 781 states and 2133 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) [2021-08-21 11:57:46,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:46,359 INFO L93 Difference]: Finished difference Result 1114 states and 2914 transitions. [2021-08-21 11:57:46,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:57:46,359 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 [2021-08-21 11:57:46,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:46,366 INFO L225 Difference]: With dead ends: 1114 [2021-08-21 11:57:46,366 INFO L226 Difference]: Without dead ends: 1114 [2021-08-21 11:57:46,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:57:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-08-21 11:57:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 899. [2021-08-21 11:57:46,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.771714922048998) internal successors, (2489), 898 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2489 transitions. [2021-08-21 11:57:46,397 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2489 transitions. Word has length 20 [2021-08-21 11:57:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:46,397 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 2489 transitions. [2021-08-21 11:57:46,397 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) [2021-08-21 11:57:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2489 transitions. [2021-08-21 11:57:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:57:46,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:46,399 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:46,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:46,620 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 [2021-08-21 11:57:46,621 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:46,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:46,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1432444031, now seen corresponding path program 10 times [2021-08-21 11:57:46,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:46,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333240120] [2021-08-21 11:57:46,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:46,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:46,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:46,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333240120] [2021-08-21 11:57:46,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333240120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:46,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813134869] [2021-08-21 11:57:46,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:57:46,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:46,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:46,676 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) [2021-08-21 11:57:46,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 11:57:46,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:57:46,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:46,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:57:46,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:46,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813134869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:46,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:46,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 11:57:46,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197430594] [2021-08-21 11:57:46,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:57:46,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:46,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:57:46,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:46,996 INFO L87 Difference]: Start difference. First operand 899 states and 2489 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) [2021-08-21 11:57:47,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:47,108 INFO L93 Difference]: Finished difference Result 1380 states and 3776 transitions. [2021-08-21 11:57:47,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:57:47,109 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 [2021-08-21 11:57:47,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:47,116 INFO L225 Difference]: With dead ends: 1380 [2021-08-21 11:57:47,116 INFO L226 Difference]: Without dead ends: 1370 [2021-08-21 11:57:47,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:57:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-08-21 11:57:47,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1228. [2021-08-21 11:57:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.8247758761206194) internal successors, (3466), 1227 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3466 transitions. [2021-08-21 11:57:47,151 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3466 transitions. Word has length 20 [2021-08-21 11:57:47,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:47,151 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 3466 transitions. [2021-08-21 11:57:47,151 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) [2021-08-21 11:57:47,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3466 transitions. [2021-08-21 11:57:47,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:57:47,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:47,154 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:47,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:47,372 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 [2021-08-21 11:57:47,373 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:47,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:47,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2054324441, now seen corresponding path program 11 times [2021-08-21 11:57:47,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:47,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406640924] [2021-08-21 11:57:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:47,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:47,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:47,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406640924] [2021-08-21 11:57:47,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406640924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:47,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512236894] [2021-08-21 11:57:47,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:57:47,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:47,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:47,441 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) [2021-08-21 11:57:47,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 11:57:47,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:57:47,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:47,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:57:47,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:47,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512236894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:47,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:47,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 11:57:47,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777648323] [2021-08-21 11:57:47,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:57:47,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:47,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:57:47,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:47,732 INFO L87 Difference]: Start difference. First operand 1228 states and 3466 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) [2021-08-21 11:57:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:47,877 INFO L93 Difference]: Finished difference Result 1400 states and 3809 transitions. [2021-08-21 11:57:47,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:57:47,878 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 [2021-08-21 11:57:47,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:47,885 INFO L225 Difference]: With dead ends: 1400 [2021-08-21 11:57:47,885 INFO L226 Difference]: Without dead ends: 1400 [2021-08-21 11:57:47,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:47,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-08-21 11:57:47,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1248. [2021-08-21 11:57:47,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.814755412991179) internal successors, (3510), 1247 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3510 transitions. [2021-08-21 11:57:47,918 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3510 transitions. Word has length 20 [2021-08-21 11:57:47,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:47,918 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 3510 transitions. [2021-08-21 11:57:47,918 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) [2021-08-21 11:57:47,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3510 transitions. [2021-08-21 11:57:47,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:57:47,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:47,921 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:47,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:48,136 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 [2021-08-21 11:57:48,137 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:48,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1308826408, now seen corresponding path program 12 times [2021-08-21 11:57:48,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:48,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943257727] [2021-08-21 11:57:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:48,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:48,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:48,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943257727] [2021-08-21 11:57:48,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943257727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:48,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953966322] [2021-08-21 11:57:48,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:57:48,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:48,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:48,188 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) [2021-08-21 11:57:48,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 11:57:48,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 11:57:48,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:48,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:57:48,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:48,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953966322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:48,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:48,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 11:57:48,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027247762] [2021-08-21 11:57:48,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:57:48,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:48,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:57:48,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:57:48,529 INFO L87 Difference]: Start difference. First operand 1248 states and 3510 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) [2021-08-21 11:57:48,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:48,609 INFO L93 Difference]: Finished difference Result 1485 states and 3980 transitions. [2021-08-21 11:57:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:57:48,609 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 [2021-08-21 11:57:48,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:48,617 INFO L225 Difference]: With dead ends: 1485 [2021-08-21 11:57:48,617 INFO L226 Difference]: Without dead ends: 1482 [2021-08-21 11:57:48,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:48,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-08-21 11:57:48,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1250. [2021-08-21 11:57:48,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 2.8086469175340274) internal successors, (3508), 1249 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 3508 transitions. [2021-08-21 11:57:48,651 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 3508 transitions. Word has length 20 [2021-08-21 11:57:48,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:48,651 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 3508 transitions. [2021-08-21 11:57:48,651 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) [2021-08-21 11:57:48,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 3508 transitions. [2021-08-21 11:57:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:57:48,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:48,653 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:48,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:48,877 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 [2021-08-21 11:57:48,877 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:48,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:48,877 INFO L82 PathProgramCache]: Analyzing trace with hash 603070399, now seen corresponding path program 13 times [2021-08-21 11:57:48,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:48,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116036490] [2021-08-21 11:57:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:48,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:48,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:48,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116036490] [2021-08-21 11:57:48,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116036490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:48,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265195624] [2021-08-21 11:57:48,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:57:48,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:48,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:48,952 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) [2021-08-21 11:57:48,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 11:57:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:49,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:57:49,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:49,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265195624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:49,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:49,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-08-21 11:57:49,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666123478] [2021-08-21 11:57:49,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:57:49,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:49,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:57:49,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:57:49,259 INFO L87 Difference]: Start difference. First operand 1250 states and 3508 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) [2021-08-21 11:57:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:49,417 INFO L93 Difference]: Finished difference Result 1426 states and 3852 transitions. [2021-08-21 11:57:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:57:49,418 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 [2021-08-21 11:57:49,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:49,425 INFO L225 Difference]: With dead ends: 1426 [2021-08-21 11:57:49,425 INFO L226 Difference]: Without dead ends: 1426 [2021-08-21 11:57:49,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:57:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-08-21 11:57:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1193. [2021-08-21 11:57:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.8003355704697985) internal successors, (3338), 1192 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3338 transitions. [2021-08-21 11:57:49,456 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3338 transitions. Word has length 20 [2021-08-21 11:57:49,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:49,456 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 3338 transitions. [2021-08-21 11:57:49,456 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) [2021-08-21 11:57:49,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3338 transitions. [2021-08-21 11:57:49,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 11:57:49,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:49,459 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:49,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:49,672 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 [2021-08-21 11:57:49,673 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:49,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:49,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1515888974, now seen corresponding path program 14 times [2021-08-21 11:57:49,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:49,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175711148] [2021-08-21 11:57:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:49,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:49,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:49,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175711148] [2021-08-21 11:57:49,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175711148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:49,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337730512] [2021-08-21 11:57:49,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:57:49,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:49,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:49,729 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) [2021-08-21 11:57:49,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 11:57:49,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:57:49,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:49,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 11:57:49,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:50,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337730512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:50,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:50,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 11:57:50,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20598020] [2021-08-21 11:57:50,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:57:50,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:50,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:57:50,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:57:50,101 INFO L87 Difference]: Start difference. First operand 1193 states and 3338 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) [2021-08-21 11:57:50,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:50,202 INFO L93 Difference]: Finished difference Result 1396 states and 3748 transitions. [2021-08-21 11:57:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:57:50,202 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 [2021-08-21 11:57:50,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:50,207 INFO L225 Difference]: With dead ends: 1396 [2021-08-21 11:57:50,207 INFO L226 Difference]: Without dead ends: 1382 [2021-08-21 11:57:50,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:57:50,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-08-21 11:57:50,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1217. [2021-08-21 11:57:50,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 2.7779605263157894) internal successors, (3378), 1216 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3378 transitions. [2021-08-21 11:57:50,237 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3378 transitions. Word has length 20 [2021-08-21 11:57:50,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:50,237 INFO L470 AbstractCegarLoop]: Abstraction has 1217 states and 3378 transitions. [2021-08-21 11:57:50,237 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) [2021-08-21 11:57:50,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3378 transitions. [2021-08-21 11:57:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 11:57:50,240 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:50,240 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:50,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-21 11:57:50,452 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 [2021-08-21 11:57:50,453 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:50,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:50,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1957491467, now seen corresponding path program 1 times [2021-08-21 11:57:50,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:50,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092140401] [2021-08-21 11:57:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:50,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:50,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:50,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092140401] [2021-08-21 11:57:50,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092140401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:50,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086965052] [2021-08-21 11:57:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:50,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:50,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:50,521 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) [2021-08-21 11:57:50,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 11:57:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:57:50,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:50,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086965052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:50,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:50,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 11:57:50,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358543817] [2021-08-21 11:57:50,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:57:50,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:50,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:57:50,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:57:50,933 INFO L87 Difference]: Start difference. First operand 1217 states and 3378 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) [2021-08-21 11:57:51,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:51,311 INFO L93 Difference]: Finished difference Result 1620 states and 4189 transitions. [2021-08-21 11:57:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 11:57:51,311 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 [2021-08-21 11:57:51,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:51,316 INFO L225 Difference]: With dead ends: 1620 [2021-08-21 11:57:51,317 INFO L226 Difference]: Without dead ends: 1620 [2021-08-21 11:57:51,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:57:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-08-21 11:57:51,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1363. [2021-08-21 11:57:51,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.6908957415565347) internal successors, (3665), 1362 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3665 transitions. [2021-08-21 11:57:51,348 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3665 transitions. Word has length 23 [2021-08-21 11:57:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:51,349 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 3665 transitions. [2021-08-21 11:57:51,349 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) [2021-08-21 11:57:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3665 transitions. [2021-08-21 11:57:51,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 11:57:51,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:51,352 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:51,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:51,572 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 [2021-08-21 11:57:51,573 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:51,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:51,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1617196245, now seen corresponding path program 15 times [2021-08-21 11:57:51,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:51,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579454318] [2021-08-21 11:57:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:51,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:57:51,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:51,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579454318] [2021-08-21 11:57:51,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579454318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:51,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260823886] [2021-08-21 11:57:51,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:57:51,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:51,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:51,631 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) [2021-08-21 11:57:51,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 11:57:51,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:57:51,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:51,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:57:51,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:57:52,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260823886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:52,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:52,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 11:57:52,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630194816] [2021-08-21 11:57:52,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:52,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:52,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:52,041 INFO L87 Difference]: Start difference. First operand 1363 states and 3665 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) [2021-08-21 11:57:52,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:52,122 INFO L93 Difference]: Finished difference Result 1903 states and 5027 transitions. [2021-08-21 11:57:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:57:52,122 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 [2021-08-21 11:57:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:52,131 INFO L225 Difference]: With dead ends: 1903 [2021-08-21 11:57:52,131 INFO L226 Difference]: Without dead ends: 1896 [2021-08-21 11:57:52,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:52,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-08-21 11:57:52,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1797. [2021-08-21 11:57:52,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1796 states have (on average 2.693207126948775) internal successors, (4837), 1796 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 4837 transitions. [2021-08-21 11:57:52,175 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 4837 transitions. Word has length 23 [2021-08-21 11:57:52,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:52,175 INFO L470 AbstractCegarLoop]: Abstraction has 1797 states and 4837 transitions. [2021-08-21 11:57:52,176 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) [2021-08-21 11:57:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 4837 transitions. [2021-08-21 11:57:52,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 11:57:52,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:52,179 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:52,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:52,392 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 [2021-08-21 11:57:52,393 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:52,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:52,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1684522285, now seen corresponding path program 16 times [2021-08-21 11:57:52,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:52,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018598160] [2021-08-21 11:57:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:52,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 11:57:52,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:52,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018598160] [2021-08-21 11:57:52,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018598160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:52,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034852689] [2021-08-21 11:57:52,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:57:52,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:52,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:52,443 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) [2021-08-21 11:57:52,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 11:57:52,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:57:52,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:52,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:57:52,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 11:57:52,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034852689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:52,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:52,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 11:57:52,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124201525] [2021-08-21 11:57:52,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:52,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:52,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:52,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:52,792 INFO L87 Difference]: Start difference. First operand 1797 states and 4837 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) [2021-08-21 11:57:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:52,855 INFO L93 Difference]: Finished difference Result 2099 states and 5565 transitions. [2021-08-21 11:57:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:57:52,856 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 [2021-08-21 11:57:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:52,862 INFO L225 Difference]: With dead ends: 2099 [2021-08-21 11:57:52,863 INFO L226 Difference]: Without dead ends: 2092 [2021-08-21 11:57:52,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:52,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-08-21 11:57:52,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1863. [2021-08-21 11:57:52,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.700859291084855) internal successors, (5029), 1862 states have internal predecessors, (5029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:52,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5029 transitions. [2021-08-21 11:57:52,908 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5029 transitions. Word has length 23 [2021-08-21 11:57:52,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:52,908 INFO L470 AbstractCegarLoop]: Abstraction has 1863 states and 5029 transitions. [2021-08-21 11:57:52,908 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) [2021-08-21 11:57:52,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5029 transitions. [2021-08-21 11:57:52,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 11:57:52,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:52,912 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:52,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:53,132 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 [2021-08-21 11:57:53,133 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:53,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:53,133 INFO L82 PathProgramCache]: Analyzing trace with hash 709154997, now seen corresponding path program 1 times [2021-08-21 11:57:53,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:53,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651196090] [2021-08-21 11:57:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:53,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:53,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:53,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651196090] [2021-08-21 11:57:53,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651196090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:53,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466538020] [2021-08-21 11:57:53,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:53,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:53,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:53,227 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) [2021-08-21 11:57:53,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 11:57:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:53,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:57:53,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:53,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466538020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:53,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:53,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 11:57:53,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202068005] [2021-08-21 11:57:53,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:57:53,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:53,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:57:53,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:53,664 INFO L87 Difference]: Start difference. First operand 1863 states and 5029 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) [2021-08-21 11:57:53,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:53,856 INFO L93 Difference]: Finished difference Result 1530 states and 4049 transitions. [2021-08-21 11:57:53,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:57:53,857 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 23 [2021-08-21 11:57:53,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:53,861 INFO L225 Difference]: With dead ends: 1530 [2021-08-21 11:57:53,861 INFO L226 Difference]: Without dead ends: 1391 [2021-08-21 11:57:53,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:57:53,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-08-21 11:57:53,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1357. [2021-08-21 11:57:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 2.7109144542772863) internal successors, (3676), 1356 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:53,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 3676 transitions. [2021-08-21 11:57:53,884 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 3676 transitions. Word has length 23 [2021-08-21 11:57:53,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:53,885 INFO L470 AbstractCegarLoop]: Abstraction has 1357 states and 3676 transitions. [2021-08-21 11:57:53,885 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) [2021-08-21 11:57:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 3676 transitions. [2021-08-21 11:57:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 11:57:53,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:53,888 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:53,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:54,100 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 [2021-08-21 11:57:54,101 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:54,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:54,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1265080065, now seen corresponding path program 2 times [2021-08-21 11:57:54,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:54,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413341804] [2021-08-21 11:57:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:54,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:57:54,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:54,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413341804] [2021-08-21 11:57:54,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413341804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:54,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855889052] [2021-08-21 11:57:54,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:57:54,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:54,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:54,178 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) [2021-08-21 11:57:54,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 11:57:54,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:57:54,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:54,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:57:54,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:54,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855889052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:54,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:54,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 11:57:54,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609380430] [2021-08-21 11:57:54,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:57:54,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:54,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:57:54,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:54,624 INFO L87 Difference]: Start difference. First operand 1357 states and 3676 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) [2021-08-21 11:57:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:54,841 INFO L93 Difference]: Finished difference Result 1538 states and 4021 transitions. [2021-08-21 11:57:54,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:57:54,842 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 23 [2021-08-21 11:57:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:54,846 INFO L225 Difference]: With dead ends: 1538 [2021-08-21 11:57:54,846 INFO L226 Difference]: Without dead ends: 1538 [2021-08-21 11:57:54,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:57:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-08-21 11:57:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1383. [2021-08-21 11:57:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 2.703328509406657) internal successors, (3736), 1382 states have internal predecessors, (3736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 3736 transitions. [2021-08-21 11:57:54,878 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 3736 transitions. Word has length 23 [2021-08-21 11:57:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:54,878 INFO L470 AbstractCegarLoop]: Abstraction has 1383 states and 3736 transitions. [2021-08-21 11:57:54,878 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) [2021-08-21 11:57:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 3736 transitions. [2021-08-21 11:57:54,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 11:57:54,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:54,881 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:54,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:55,106 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 [2021-08-21 11:57:55,106 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:55,107 INFO L82 PathProgramCache]: Analyzing trace with hash 767996040, now seen corresponding path program 2 times [2021-08-21 11:57:55,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:55,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041835759] [2021-08-21 11:57:55,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:55,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:55,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:55,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041835759] [2021-08-21 11:57:55,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041835759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:55,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854497089] [2021-08-21 11:57:55,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:57:55,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:55,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:55,193 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) [2021-08-21 11:57:55,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 11:57:55,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:57:55,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:55,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:57:55,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:55,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854497089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:55,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:55,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-21 11:57:55,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258833446] [2021-08-21 11:57:55,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:57:55,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:55,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:57:55,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:57:55,659 INFO L87 Difference]: Start difference. First operand 1383 states and 3736 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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) [2021-08-21 11:57:55,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:55,768 INFO L93 Difference]: Finished difference Result 1546 states and 4028 transitions. [2021-08-21 11:57:55,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:57:55,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 23 [2021-08-21 11:57:55,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:55,783 INFO L225 Difference]: With dead ends: 1546 [2021-08-21 11:57:55,784 INFO L226 Difference]: Without dead ends: 1526 [2021-08-21 11:57:55,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:57:55,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-08-21 11:57:55,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1395. [2021-08-21 11:57:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 2.6886657101865135) internal successors, (3748), 1394 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3748 transitions. [2021-08-21 11:57:55,818 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3748 transitions. Word has length 23 [2021-08-21 11:57:55,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:55,818 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 3748 transitions. [2021-08-21 11:57:55,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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) [2021-08-21 11:57:55,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3748 transitions. [2021-08-21 11:57:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 11:57:55,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:55,821 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:55,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:56,045 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 [2021-08-21 11:57:56,045 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:56,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:56,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1930655477, now seen corresponding path program 3 times [2021-08-21 11:57:56,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:56,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005468423] [2021-08-21 11:57:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:56,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:57:56,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:56,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005468423] [2021-08-21 11:57:56,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005468423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:56,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021786714] [2021-08-21 11:57:56,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:57:56,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:56,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:56,122 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) [2021-08-21 11:57:56,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 11:57:56,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:57:56,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:56,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:57:56,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:56,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021786714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:56,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:56,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 11:57:56,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999253890] [2021-08-21 11:57:56,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:57:56,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:57:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:56,609 INFO L87 Difference]: Start difference. First operand 1395 states and 3748 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) [2021-08-21 11:57:56,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:56,849 INFO L93 Difference]: Finished difference Result 1913 states and 4928 transitions. [2021-08-21 11:57:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:57:56,850 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 [2021-08-21 11:57:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:56,853 INFO L225 Difference]: With dead ends: 1913 [2021-08-21 11:57:56,853 INFO L226 Difference]: Without dead ends: 1913 [2021-08-21 11:57:56,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:57:56,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-08-21 11:57:56,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1544. [2021-08-21 11:57:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 2.6824368114063515) internal successors, (4139), 1543 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:56,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 4139 transitions. [2021-08-21 11:57:56,885 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 4139 transitions. Word has length 23 [2021-08-21 11:57:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:56,885 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 4139 transitions. [2021-08-21 11:57:56,886 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) [2021-08-21 11:57:56,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 4139 transitions. [2021-08-21 11:57:56,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 11:57:56,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:56,888 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:56,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-21 11:57:57,112 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 [2021-08-21 11:57:57,112 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:57,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:57,112 INFO L82 PathProgramCache]: Analyzing trace with hash -863978827, now seen corresponding path program 3 times [2021-08-21 11:57:57,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:57,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097627718] [2021-08-21 11:57:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:57,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:57:57,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:57,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097627718] [2021-08-21 11:57:57,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097627718] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:57:57,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:57:57,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 11:57:57,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016620220] [2021-08-21 11:57:57,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 11:57:57,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:57,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 11:57:57,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:57,192 INFO L87 Difference]: Start difference. First operand 1544 states and 4139 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) [2021-08-21 11:57:57,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:57,252 INFO L93 Difference]: Finished difference Result 1492 states and 3879 transitions. [2021-08-21 11:57:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 11:57:57,252 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 [2021-08-21 11:57:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:57,257 INFO L225 Difference]: With dead ends: 1492 [2021-08-21 11:57:57,257 INFO L226 Difference]: Without dead ends: 1411 [2021-08-21 11:57:57,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 11:57:57,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-08-21 11:57:57,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1381. [2021-08-21 11:57:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 2.6231884057971016) internal successors, (3620), 1380 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:57,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 3620 transitions. [2021-08-21 11:57:57,285 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 3620 transitions. Word has length 23 [2021-08-21 11:57:57,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:57,286 INFO L470 AbstractCegarLoop]: Abstraction has 1381 states and 3620 transitions. [2021-08-21 11:57:57,286 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) [2021-08-21 11:57:57,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 3620 transitions. [2021-08-21 11:57:57,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 11:57:57,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:57,288 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:57,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-21 11:57:57,289 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:57,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1477515007, now seen corresponding path program 4 times [2021-08-21 11:57:57,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:57,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481452357] [2021-08-21 11:57:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:57,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:57:57,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:57,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481452357] [2021-08-21 11:57:57,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481452357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:57,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52535150] [2021-08-21 11:57:57,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:57:57,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:57,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:57,359 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) [2021-08-21 11:57:57,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 11:57:57,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:57:57,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:57,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:57:57,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:57,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52535150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:57,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:57,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 11:57:57,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493477159] [2021-08-21 11:57:57,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:57:57,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:57,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:57:57,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:57:57,812 INFO L87 Difference]: Start difference. First operand 1381 states and 3620 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) [2021-08-21 11:57:58,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:58,048 INFO L93 Difference]: Finished difference Result 1624 states and 4116 transitions. [2021-08-21 11:57:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:57:58,048 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 23 [2021-08-21 11:57:58,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:58,053 INFO L225 Difference]: With dead ends: 1624 [2021-08-21 11:57:58,053 INFO L226 Difference]: Without dead ends: 1612 [2021-08-21 11:57:58,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:57:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-08-21 11:57:58,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1413. [2021-08-21 11:57:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.6203966005665724) internal successors, (3700), 1412 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3700 transitions. [2021-08-21 11:57:58,085 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3700 transitions. Word has length 23 [2021-08-21 11:57:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:58,085 INFO L470 AbstractCegarLoop]: Abstraction has 1413 states and 3700 transitions. [2021-08-21 11:57:58,085 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) [2021-08-21 11:57:58,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3700 transitions. [2021-08-21 11:57:58,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 11:57:58,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:58,088 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:58,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:58,311 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 [2021-08-21 11:57:58,312 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:58,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:58,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1626597001, now seen corresponding path program 17 times [2021-08-21 11:57:58,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:58,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454420244] [2021-08-21 11:57:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:58,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:57:58,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:58,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454420244] [2021-08-21 11:57:58,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454420244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:58,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161223050] [2021-08-21 11:57:58,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:57:58,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:58,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:58,375 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) [2021-08-21 11:57:58,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 11:57:58,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:57:58,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:57:58,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:57:58,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:57:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:58,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161223050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:58,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:57:58,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 11 [2021-08-21 11:57:58,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876044958] [2021-08-21 11:57:58,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:57:58,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:57:58,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:57:58,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:57:58,908 INFO L87 Difference]: Start difference. First operand 1413 states and 3700 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-08-21 11:57:59,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:57:59,441 INFO L93 Difference]: Finished difference Result 2940 states and 7390 transitions. [2021-08-21 11:57:59,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 11:57:59,442 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 [2021-08-21 11:57:59,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:57:59,450 INFO L225 Difference]: With dead ends: 2940 [2021-08-21 11:57:59,450 INFO L226 Difference]: Without dead ends: 2926 [2021-08-21 11:57:59,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:57:59,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-08-21 11:57:59,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1583. [2021-08-21 11:57:59,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 2.618204804045512) internal successors, (4142), 1582 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:57:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 4142 transitions. [2021-08-21 11:57:59,494 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 4142 transitions. Word has length 23 [2021-08-21 11:57:59,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:57:59,494 INFO L470 AbstractCegarLoop]: Abstraction has 1583 states and 4142 transitions. [2021-08-21 11:57:59,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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) [2021-08-21 11:57:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 4142 transitions. [2021-08-21 11:57:59,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 11:57:59,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:57:59,497 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:57:59,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 11:57:59,720 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 [2021-08-21 11:57:59,721 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:57:59,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:57:59,721 INFO L82 PathProgramCache]: Analyzing trace with hash 664402327, now seen corresponding path program 5 times [2021-08-21 11:57:59,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:57:59,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234804155] [2021-08-21 11:57:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:57:59,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:57:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:57:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:57:59,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:57:59,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234804155] [2021-08-21 11:57:59,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234804155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:57:59,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016548078] [2021-08-21 11:57:59,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:57:59,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:57:59,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:57:59,781 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) [2021-08-21 11:57:59,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 11:58:00,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:58:00,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:00,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:58:00,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:00,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016548078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:00,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:00,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 11:58:00,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161457844] [2021-08-21 11:58:00,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:58:00,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:00,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:58:00,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:00,312 INFO L87 Difference]: Start difference. First operand 1583 states and 4142 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) [2021-08-21 11:58:00,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:00,631 INFO L93 Difference]: Finished difference Result 1758 states and 4409 transitions. [2021-08-21 11:58:00,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 11:58:00,631 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 23 [2021-08-21 11:58:00,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:00,634 INFO L225 Difference]: With dead ends: 1758 [2021-08-21 11:58:00,634 INFO L226 Difference]: Without dead ends: 1746 [2021-08-21 11:58:00,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:58:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-08-21 11:58:00,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1437. [2021-08-21 11:58:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 2.597493036211699) internal successors, (3730), 1436 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:00,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 3730 transitions. [2021-08-21 11:58:00,658 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 3730 transitions. Word has length 23 [2021-08-21 11:58:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:00,658 INFO L470 AbstractCegarLoop]: Abstraction has 1437 states and 3730 transitions. [2021-08-21 11:58:00,659 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) [2021-08-21 11:58:00,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 3730 transitions. [2021-08-21 11:58:00,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 11:58:00,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:00,661 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:00,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:00,879 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 [2021-08-21 11:58:00,879 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:00,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:00,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1869408663, now seen corresponding path program 4 times [2021-08-21 11:58:00,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:00,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381149977] [2021-08-21 11:58:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:00,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:00,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:00,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381149977] [2021-08-21 11:58:00,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381149977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:00,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962627686] [2021-08-21 11:58:00,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:00,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:00,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:00,962 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) [2021-08-21 11:58:00,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 11:58:01,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:01,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:01,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:58:01,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:01,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962627686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:01,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:01,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 11:58:01,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213799625] [2021-08-21 11:58:01,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:58:01,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:01,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:58:01,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:58:01,463 INFO L87 Difference]: Start difference. First operand 1437 states and 3730 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) [2021-08-21 11:58:01,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:01,573 INFO L93 Difference]: Finished difference Result 1432 states and 3672 transitions. [2021-08-21 11:58:01,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:58:01,573 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 [2021-08-21 11:58:01,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:01,576 INFO L225 Difference]: With dead ends: 1432 [2021-08-21 11:58:01,576 INFO L226 Difference]: Without dead ends: 1365 [2021-08-21 11:58:01,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:01,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-08-21 11:58:01,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1356. [2021-08-21 11:58:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 2.607380073800738) internal successors, (3533), 1355 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3533 transitions. [2021-08-21 11:58:01,600 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3533 transitions. Word has length 23 [2021-08-21 11:58:01,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:01,600 INFO L470 AbstractCegarLoop]: Abstraction has 1356 states and 3533 transitions. [2021-08-21 11:58:01,600 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) [2021-08-21 11:58:01,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3533 transitions. [2021-08-21 11:58:01,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:01,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:01,603 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:01,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:01,820 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 [2021-08-21 11:58:01,821 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:01,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:01,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1790576731, now seen corresponding path program 18 times [2021-08-21 11:58:01,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:01,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748327232] [2021-08-21 11:58:01,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:01,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:01,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:01,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748327232] [2021-08-21 11:58:01,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748327232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:01,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328069155] [2021-08-21 11:58:01,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:01,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:01,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:01,914 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) [2021-08-21 11:58:01,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 11:58:02,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:58:02,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:02,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:02,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:02,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328069155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:02,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:02,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 11:58:02,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458470791] [2021-08-21 11:58:02,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:58:02,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:02,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:58:02,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:02,491 INFO L87 Difference]: Start difference. First operand 1356 states and 3533 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) [2021-08-21 11:58:02,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:02,667 INFO L93 Difference]: Finished difference Result 1715 states and 4244 transitions. [2021-08-21 11:58:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:58:02,668 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 [2021-08-21 11:58:02,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:02,670 INFO L225 Difference]: With dead ends: 1715 [2021-08-21 11:58:02,670 INFO L226 Difference]: Without dead ends: 1715 [2021-08-21 11:58:02,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:58:02,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-08-21 11:58:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1404. [2021-08-21 11:58:02,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.6129722024233786) internal successors, (3666), 1403 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 3666 transitions. [2021-08-21 11:58:02,692 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 3666 transitions. Word has length 26 [2021-08-21 11:58:02,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:02,692 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 3666 transitions. [2021-08-21 11:58:02,692 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) [2021-08-21 11:58:02,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 3666 transitions. [2021-08-21 11:58:02,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:02,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:02,695 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:02,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:02,920 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 [2021-08-21 11:58:02,920 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:02,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:02,921 INFO L82 PathProgramCache]: Analyzing trace with hash 420088814, now seen corresponding path program 19 times [2021-08-21 11:58:02,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:02,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679563112] [2021-08-21 11:58:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:02,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:02,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:02,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679563112] [2021-08-21 11:58:02,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679563112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:02,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606994390] [2021-08-21 11:58:02,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:02,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:02,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:02,994 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) [2021-08-21 11:58:03,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 11:58:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:03,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:03,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:03,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606994390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:03,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:03,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-21 11:58:03,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626640661] [2021-08-21 11:58:03,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:58:03,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:03,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:58:03,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:03,543 INFO L87 Difference]: Start difference. First operand 1404 states and 3666 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) [2021-08-21 11:58:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:03,682 INFO L93 Difference]: Finished difference Result 2473 states and 6334 transitions. [2021-08-21 11:58:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:03,683 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 [2021-08-21 11:58:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:03,688 INFO L225 Difference]: With dead ends: 2473 [2021-08-21 11:58:03,688 INFO L226 Difference]: Without dead ends: 2455 [2021-08-21 11:58:03,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:03,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-08-21 11:58:03,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2018. [2021-08-21 11:58:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.707982151710461) internal successors, (5462), 2017 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5462 transitions. [2021-08-21 11:58:03,734 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5462 transitions. Word has length 26 [2021-08-21 11:58:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:03,734 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 5462 transitions. [2021-08-21 11:58:03,734 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) [2021-08-21 11:58:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5462 transitions. [2021-08-21 11:58:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:03,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:03,738 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:03,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:03,952 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 [2021-08-21 11:58:03,953 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:03,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:03,953 INFO L82 PathProgramCache]: Analyzing trace with hash -537103826, now seen corresponding path program 20 times [2021-08-21 11:58:03,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:03,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410720909] [2021-08-21 11:58:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:03,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:04,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:04,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410720909] [2021-08-21 11:58:04,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410720909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:04,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896396529] [2021-08-21 11:58:04,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:04,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:04,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:04,024 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) [2021-08-21 11:58:04,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 11:58:04,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:04,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:04,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:04,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:04,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896396529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:04,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:04,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:58:04,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530466536] [2021-08-21 11:58:04,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:58:04,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:04,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:58:04,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:58:04,624 INFO L87 Difference]: Start difference. First operand 2018 states and 5462 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) [2021-08-21 11:58:04,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:04,771 INFO L93 Difference]: Finished difference Result 2447 states and 6260 transitions. [2021-08-21 11:58:04,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:58:04,771 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 [2021-08-21 11:58:04,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:04,775 INFO L225 Difference]: With dead ends: 2447 [2021-08-21 11:58:04,775 INFO L226 Difference]: Without dead ends: 2447 [2021-08-21 11:58:04,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:04,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-08-21 11:58:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1914. [2021-08-21 11:58:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 2.6905384213277577) internal successors, (5147), 1913 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:04,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 5147 transitions. [2021-08-21 11:58:04,810 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 5147 transitions. Word has length 26 [2021-08-21 11:58:04,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:04,810 INFO L470 AbstractCegarLoop]: Abstraction has 1914 states and 5147 transitions. [2021-08-21 11:58:04,811 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) [2021-08-21 11:58:04,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 5147 transitions. [2021-08-21 11:58:04,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:04,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:04,814 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:04,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:05,037 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 [2021-08-21 11:58:05,038 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:05,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:05,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1468920273, now seen corresponding path program 21 times [2021-08-21 11:58:05,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:05,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970192688] [2021-08-21 11:58:05,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:05,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:05,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:05,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970192688] [2021-08-21 11:58:05,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970192688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:05,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642610171] [2021-08-21 11:58:05,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:05,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:05,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:05,107 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) [2021-08-21 11:58:05,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 11:58:05,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:58:05,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:05,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:05,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:05,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642610171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:05,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:05,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:58:05,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020024320] [2021-08-21 11:58:05,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:58:05,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:05,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:58:05,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:58:05,733 INFO L87 Difference]: Start difference. First operand 1914 states and 5147 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) [2021-08-21 11:58:05,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:05,818 INFO L93 Difference]: Finished difference Result 2092 states and 5497 transitions. [2021-08-21 11:58:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:58:05,819 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 [2021-08-21 11:58:05,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:05,822 INFO L225 Difference]: With dead ends: 2092 [2021-08-21 11:58:05,822 INFO L226 Difference]: Without dead ends: 2089 [2021-08-21 11:58:05,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-08-21 11:58:05,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1899. [2021-08-21 11:58:05,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.684931506849315) internal successors, (5096), 1898 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:05,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5096 transitions. [2021-08-21 11:58:05,859 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5096 transitions. Word has length 26 [2021-08-21 11:58:05,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:05,859 INFO L470 AbstractCegarLoop]: Abstraction has 1899 states and 5096 transitions. [2021-08-21 11:58:05,859 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) [2021-08-21 11:58:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5096 transitions. [2021-08-21 11:58:05,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:05,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:05,863 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:05,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:06,084 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 [2021-08-21 11:58:06,085 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:06,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:06,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1453216515, now seen corresponding path program 22 times [2021-08-21 11:58:06,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:06,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114622957] [2021-08-21 11:58:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:06,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:06,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:06,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114622957] [2021-08-21 11:58:06,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114622957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:06,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797053837] [2021-08-21 11:58:06,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:06,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:06,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:06,154 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) [2021-08-21 11:58:06,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 11:58:06,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:06,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:06,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:06,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:06,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797053837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:06,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:06,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:58:06,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887700637] [2021-08-21 11:58:06,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:58:06,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:06,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:58:06,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:58:06,818 INFO L87 Difference]: Start difference. First operand 1899 states and 5096 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) [2021-08-21 11:58:06,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:06,940 INFO L93 Difference]: Finished difference Result 2552 states and 6599 transitions. [2021-08-21 11:58:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:58:06,941 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 [2021-08-21 11:58:06,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:06,945 INFO L225 Difference]: With dead ends: 2552 [2021-08-21 11:58:06,945 INFO L226 Difference]: Without dead ends: 2552 [2021-08-21 11:58:06,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-08-21 11:58:06,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2092. [2021-08-21 11:58:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 2.713534194165471) internal successors, (5674), 2091 states have internal predecessors, (5674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 5674 transitions. [2021-08-21 11:58:06,980 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 5674 transitions. Word has length 26 [2021-08-21 11:58:06,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:06,980 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 5674 transitions. [2021-08-21 11:58:06,981 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) [2021-08-21 11:58:06,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 5674 transitions. [2021-08-21 11:58:06,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:06,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:06,983 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:07,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 11:58:07,184 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 [2021-08-21 11:58:07,184 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:07,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:07,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2030592720, now seen corresponding path program 23 times [2021-08-21 11:58:07,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:07,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065810693] [2021-08-21 11:58:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:07,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:07,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:07,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065810693] [2021-08-21 11:58:07,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065810693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:07,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533986788] [2021-08-21 11:58:07,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:07,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:07,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:07,267 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) [2021-08-21 11:58:07,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 11:58:07,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:58:07,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:07,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:07,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:08,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533986788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:08,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:08,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-21 11:58:08,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252153656] [2021-08-21 11:58:08,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:58:08,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:08,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:58:08,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:08,061 INFO L87 Difference]: Start difference. First operand 2092 states and 5674 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) [2021-08-21 11:58:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:08,226 INFO L93 Difference]: Finished difference Result 3728 states and 10027 transitions. [2021-08-21 11:58:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:58:08,226 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 [2021-08-21 11:58:08,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:08,234 INFO L225 Difference]: With dead ends: 3728 [2021-08-21 11:58:08,234 INFO L226 Difference]: Without dead ends: 3712 [2021-08-21 11:58:08,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:08,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-08-21 11:58:08,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3201. [2021-08-21 11:58:08,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 2.8134375) internal successors, (9003), 3200 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:08,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 9003 transitions. [2021-08-21 11:58:08,310 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 9003 transitions. Word has length 26 [2021-08-21 11:58:08,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:08,310 INFO L470 AbstractCegarLoop]: Abstraction has 3201 states and 9003 transitions. [2021-08-21 11:58:08,311 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) [2021-08-21 11:58:08,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 9003 transitions. [2021-08-21 11:58:08,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:08,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:08,318 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:08,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:08,532 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 [2021-08-21 11:58:08,533 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:08,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:08,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1642494166, now seen corresponding path program 24 times [2021-08-21 11:58:08,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:08,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151030493] [2021-08-21 11:58:08,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:08,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:08,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:08,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151030493] [2021-08-21 11:58:08,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151030493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:08,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794899819] [2021-08-21 11:58:08,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:08,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:08,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:08,596 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) [2021-08-21 11:58:08,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 11:58:09,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:58:09,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:09,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:09,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:09,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794899819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:09,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:09,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-21 11:58:09,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592003639] [2021-08-21 11:58:09,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:58:09,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:58:09,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:09,204 INFO L87 Difference]: Start difference. First operand 3201 states and 9003 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) [2021-08-21 11:58:09,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:09,378 INFO L93 Difference]: Finished difference Result 3830 states and 10240 transitions. [2021-08-21 11:58:09,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:58:09,379 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 [2021-08-21 11:58:09,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:09,387 INFO L225 Difference]: With dead ends: 3830 [2021-08-21 11:58:09,387 INFO L226 Difference]: Without dead ends: 3830 [2021-08-21 11:58:09,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:09,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2021-08-21 11:58:09,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3216. [2021-08-21 11:58:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 2.805909797822706) internal successors, (9021), 3215 states have internal predecessors, (9021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 9021 transitions. [2021-08-21 11:58:09,458 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 9021 transitions. Word has length 26 [2021-08-21 11:58:09,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:09,458 INFO L470 AbstractCegarLoop]: Abstraction has 3216 states and 9021 transitions. [2021-08-21 11:58:09,458 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) [2021-08-21 11:58:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 9021 transitions. [2021-08-21 11:58:09,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:09,463 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:09,463 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:09,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:09,676 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 [2021-08-21 11:58:09,677 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:09,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:09,677 INFO L82 PathProgramCache]: Analyzing trace with hash 710677719, now seen corresponding path program 25 times [2021-08-21 11:58:09,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:09,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020476436] [2021-08-21 11:58:09,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:09,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:09,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:09,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020476436] [2021-08-21 11:58:09,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020476436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:09,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737505072] [2021-08-21 11:58:09,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:09,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:09,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:09,752 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) [2021-08-21 11:58:09,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 11:58:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:10,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:10,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:58:10,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737505072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:10,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:10,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:58:10,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736244308] [2021-08-21 11:58:10,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:58:10,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:10,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:58:10,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:58:10,373 INFO L87 Difference]: Start difference. First operand 3216 states and 9021 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) [2021-08-21 11:58:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:10,513 INFO L93 Difference]: Finished difference Result 3629 states and 9839 transitions. [2021-08-21 11:58:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:58:10,513 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 [2021-08-21 11:58:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:10,519 INFO L225 Difference]: With dead ends: 3629 [2021-08-21 11:58:10,519 INFO L226 Difference]: Without dead ends: 3617 [2021-08-21 11:58:10,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:10,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2021-08-21 11:58:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3079. [2021-08-21 11:58:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.7979207277452893) internal successors, (8612), 3078 states have internal predecessors, (8612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8612 transitions. [2021-08-21 11:58:10,567 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8612 transitions. Word has length 26 [2021-08-21 11:58:10,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:10,567 INFO L470 AbstractCegarLoop]: Abstraction has 3079 states and 8612 transitions. [2021-08-21 11:58:10,567 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) [2021-08-21 11:58:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8612 transitions. [2021-08-21 11:58:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:10,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:10,572 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:10,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:10,784 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 [2021-08-21 11:58:10,785 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:10,785 INFO L82 PathProgramCache]: Analyzing trace with hash 4921710, now seen corresponding path program 26 times [2021-08-21 11:58:10,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:10,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266040530] [2021-08-21 11:58:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:10,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:10,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:10,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266040530] [2021-08-21 11:58:10,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266040530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:10,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34538987] [2021-08-21 11:58:10,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:10,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:10,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:10,854 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) [2021-08-21 11:58:10,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 11:58:11,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:11,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:11,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:11,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:11,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34538987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:11,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:11,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 11:58:11,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407607784] [2021-08-21 11:58:11,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:58:11,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:11,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:58:11,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:11,497 INFO L87 Difference]: Start difference. First operand 3079 states and 8612 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) [2021-08-21 11:58:11,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:11,680 INFO L93 Difference]: Finished difference Result 4208 states and 11364 transitions. [2021-08-21 11:58:11,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:58:11,681 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 [2021-08-21 11:58:11,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:11,690 INFO L225 Difference]: With dead ends: 4208 [2021-08-21 11:58:11,690 INFO L226 Difference]: Without dead ends: 4208 [2021-08-21 11:58:11,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:58:11,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-08-21 11:58:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3506. [2021-08-21 11:58:11,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 2.8185449358059915) internal successors, (9879), 3505 states have internal predecessors, (9879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 9879 transitions. [2021-08-21 11:58:11,750 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 9879 transitions. Word has length 26 [2021-08-21 11:58:11,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:11,750 INFO L470 AbstractCegarLoop]: Abstraction has 3506 states and 9879 transitions. [2021-08-21 11:58:11,750 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) [2021-08-21 11:58:11,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 9879 transitions. [2021-08-21 11:58:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:11,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:11,753 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:11,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-21 11:58:11,954 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 [2021-08-21 11:58:11,954 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:11,954 INFO L82 PathProgramCache]: Analyzing trace with hash 917740285, now seen corresponding path program 27 times [2021-08-21 11:58:11,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:11,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872516728] [2021-08-21 11:58:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:11,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:12,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:12,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872516728] [2021-08-21 11:58:12,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872516728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:12,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765335458] [2021-08-21 11:58:12,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:12,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:12,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:12,025 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) [2021-08-21 11:58:12,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 11:58:12,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:58:12,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:12,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:12,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:12,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765335458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:12,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:12,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 11:58:12,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141315467] [2021-08-21 11:58:12,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:58:12,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:12,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:58:12,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:58:12,730 INFO L87 Difference]: Start difference. First operand 3506 states and 9879 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) [2021-08-21 11:58:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:12,884 INFO L93 Difference]: Finished difference Result 3876 states and 10634 transitions. [2021-08-21 11:58:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:12,885 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 [2021-08-21 11:58:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:12,891 INFO L225 Difference]: With dead ends: 3876 [2021-08-21 11:58:12,891 INFO L226 Difference]: Without dead ends: 3864 [2021-08-21 11:58:12,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-08-21 11:58:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3527. [2021-08-21 11:58:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3527 states, 3526 states have (on average 2.811401020986954) internal successors, (9913), 3526 states have internal predecessors, (9913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:12,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 9913 transitions. [2021-08-21 11:58:12,951 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 9913 transitions. Word has length 26 [2021-08-21 11:58:12,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:12,951 INFO L470 AbstractCegarLoop]: Abstraction has 3527 states and 9913 transitions. [2021-08-21 11:58:12,951 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) [2021-08-21 11:58:12,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 9913 transitions. [2021-08-21 11:58:12,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:12,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:12,955 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:12,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:13,155 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 [2021-08-21 11:58:13,156 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:13,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:13,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1605831935, now seen corresponding path program 28 times [2021-08-21 11:58:13,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:13,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141760998] [2021-08-21 11:58:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:13,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:13,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:13,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141760998] [2021-08-21 11:58:13,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141760998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:13,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525279055] [2021-08-21 11:58:13,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:13,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:13,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:13,240 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) [2021-08-21 11:58:13,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 11:58:13,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:13,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:13,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:58:13,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:14,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525279055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:14,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:14,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 11:58:14,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862109077] [2021-08-21 11:58:14,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:58:14,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:14,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:58:14,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:14,039 INFO L87 Difference]: Start difference. First operand 3527 states and 9913 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) [2021-08-21 11:58:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:14,262 INFO L93 Difference]: Finished difference Result 4290 states and 11609 transitions. [2021-08-21 11:58:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:58:14,262 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 26 [2021-08-21 11:58:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:14,269 INFO L225 Difference]: With dead ends: 4290 [2021-08-21 11:58:14,269 INFO L226 Difference]: Without dead ends: 4290 [2021-08-21 11:58:14,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:58:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4290 states. [2021-08-21 11:58:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4290 to 3636. [2021-08-21 11:58:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.817881705639615) internal successors, (10243), 3635 states have internal predecessors, (10243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 10243 transitions. [2021-08-21 11:58:14,326 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 10243 transitions. Word has length 26 [2021-08-21 11:58:14,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:14,327 INFO L470 AbstractCegarLoop]: Abstraction has 3636 states and 10243 transitions. [2021-08-21 11:58:14,327 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) [2021-08-21 11:58:14,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 10243 transitions. [2021-08-21 11:58:14,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:14,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:14,330 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:14,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-21 11:58:14,531 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 [2021-08-21 11:58:14,531 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:14,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:14,531 INFO L82 PathProgramCache]: Analyzing trace with hash -876334610, now seen corresponding path program 29 times [2021-08-21 11:58:14,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:14,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394141533] [2021-08-21 11:58:14,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:14,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:14,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:14,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:14,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394141533] [2021-08-21 11:58:14,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394141533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:14,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167947182] [2021-08-21 11:58:14,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:14,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:14,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:14,601 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) [2021-08-21 11:58:14,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 11:58:15,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:58:15,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:15,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:15,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:15,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167947182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:15,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:15,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 11:58:15,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773061766] [2021-08-21 11:58:15,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:58:15,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:58:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:58:15,297 INFO L87 Difference]: Start difference. First operand 3636 states and 10243 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) [2021-08-21 11:58:15,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:15,465 INFO L93 Difference]: Finished difference Result 4890 states and 13623 transitions. [2021-08-21 11:58:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:58:15,465 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 26 [2021-08-21 11:58:15,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:15,474 INFO L225 Difference]: With dead ends: 4890 [2021-08-21 11:58:15,474 INFO L226 Difference]: Without dead ends: 4858 [2021-08-21 11:58:15,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:15,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-08-21 11:58:15,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 4449. [2021-08-21 11:58:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4449 states, 4448 states have (on average 2.8424010791366907) internal successors, (12643), 4448 states have internal predecessors, (12643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 12643 transitions. [2021-08-21 11:58:15,546 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 12643 transitions. Word has length 26 [2021-08-21 11:58:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:15,546 INFO L470 AbstractCegarLoop]: Abstraction has 4449 states and 12643 transitions. [2021-08-21 11:58:15,546 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) [2021-08-21 11:58:15,547 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 12643 transitions. [2021-08-21 11:58:15,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:15,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:15,550 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:15,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 11:58:15,750 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 [2021-08-21 11:58:15,751 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:15,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:15,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1917033433, now seen corresponding path program 30 times [2021-08-21 11:58:15,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:15,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218526195] [2021-08-21 11:58:15,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:15,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:15,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:15,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218526195] [2021-08-21 11:58:15,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218526195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:15,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276929879] [2021-08-21 11:58:15,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:15,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:15,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:15,814 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) [2021-08-21 11:58:15,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 11:58:16,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:58:16,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:16,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:16,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:16,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276929879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:16,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:16,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:58:16,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402866046] [2021-08-21 11:58:16,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:58:16,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:16,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:58:16,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:58:16,553 INFO L87 Difference]: Start difference. First operand 4449 states and 12643 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) [2021-08-21 11:58:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:16,697 INFO L93 Difference]: Finished difference Result 5697 states and 15817 transitions. [2021-08-21 11:58:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:58:16,697 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 [2021-08-21 11:58:16,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:16,707 INFO L225 Difference]: With dead ends: 5697 [2021-08-21 11:58:16,707 INFO L226 Difference]: Without dead ends: 5697 [2021-08-21 11:58:16,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2021-08-21 11:58:16,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 5030. [2021-08-21 11:58:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 5029 states have (on average 2.8657784847882284) internal successors, (14412), 5029 states have internal predecessors, (14412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 14412 transitions. [2021-08-21 11:58:16,792 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 14412 transitions. Word has length 26 [2021-08-21 11:58:16,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:16,792 INFO L470 AbstractCegarLoop]: Abstraction has 5030 states and 14412 transitions. [2021-08-21 11:58:16,792 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) [2021-08-21 11:58:16,792 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 14412 transitions. [2021-08-21 11:58:16,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:16,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:16,796 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:16,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:16,996 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 [2021-08-21 11:58:16,997 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:16,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1339657228, now seen corresponding path program 31 times [2021-08-21 11:58:16,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:16,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230897466] [2021-08-21 11:58:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:16,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:17,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:17,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230897466] [2021-08-21 11:58:17,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230897466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:17,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792561615] [2021-08-21 11:58:17,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:17,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:17,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:17,067 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) [2021-08-21 11:58:17,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 11:58:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:17,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:17,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:17,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792561615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:17,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:17,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:58:17,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400917379] [2021-08-21 11:58:17,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:58:17,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:17,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:58:17,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:58:17,814 INFO L87 Difference]: Start difference. First operand 5030 states and 14412 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) [2021-08-21 11:58:18,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:18,015 INFO L93 Difference]: Finished difference Result 6176 states and 17476 transitions. [2021-08-21 11:58:18,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:58:18,016 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 26 [2021-08-21 11:58:18,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:18,031 INFO L225 Difference]: With dead ends: 6176 [2021-08-21 11:58:18,031 INFO L226 Difference]: Without dead ends: 6160 [2021-08-21 11:58:18,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-08-21 11:58:18,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 5779. [2021-08-21 11:58:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5779 states, 5778 states have (on average 2.8816199376947043) internal successors, (16650), 5778 states have internal predecessors, (16650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5779 states to 5779 states and 16650 transitions. [2021-08-21 11:58:18,152 INFO L78 Accepts]: Start accepts. Automaton has 5779 states and 16650 transitions. Word has length 26 [2021-08-21 11:58:18,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:18,152 INFO L470 AbstractCegarLoop]: Abstraction has 5779 states and 16650 transitions. [2021-08-21 11:58:18,152 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) [2021-08-21 11:58:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 5779 states and 16650 transitions. [2021-08-21 11:58:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:18,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:18,157 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:18,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 11:58:18,357 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 [2021-08-21 11:58:18,357 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:18,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:18,358 INFO L82 PathProgramCache]: Analyzing trace with hash 717776818, now seen corresponding path program 32 times [2021-08-21 11:58:18,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:18,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759486860] [2021-08-21 11:58:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:18,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:18,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:18,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759486860] [2021-08-21 11:58:18,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759486860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:18,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563013982] [2021-08-21 11:58:18,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:18,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:18,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:18,434 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) [2021-08-21 11:58:18,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 11:58:19,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:19,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:19,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:19,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:19,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563013982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:19,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:19,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:58:19,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635652417] [2021-08-21 11:58:19,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:58:19,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:19,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:58:19,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:58:19,159 INFO L87 Difference]: Start difference. First operand 5779 states and 16650 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) [2021-08-21 11:58:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:19,321 INFO L93 Difference]: Finished difference Result 6311 states and 17791 transitions. [2021-08-21 11:58:19,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:58:19,321 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 26 [2021-08-21 11:58:19,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:19,335 INFO L225 Difference]: With dead ends: 6311 [2021-08-21 11:58:19,335 INFO L226 Difference]: Without dead ends: 6311 [2021-08-21 11:58:19,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-08-21 11:58:19,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5796. [2021-08-21 11:58:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5796 states, 5795 states have (on average 2.8807592752372737) internal successors, (16694), 5795 states have internal predecessors, (16694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 16694 transitions. [2021-08-21 11:58:19,474 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 16694 transitions. Word has length 26 [2021-08-21 11:58:19,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:19,474 INFO L470 AbstractCegarLoop]: Abstraction has 5796 states and 16694 transitions. [2021-08-21 11:58:19,474 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) [2021-08-21 11:58:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 16694 transitions. [2021-08-21 11:58:19,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:19,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:19,478 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:19,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:19,678 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 [2021-08-21 11:58:19,679 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:19,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:19,679 INFO L82 PathProgramCache]: Analyzing trace with hash -214039629, now seen corresponding path program 33 times [2021-08-21 11:58:19,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:19,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81048190] [2021-08-21 11:58:19,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:19,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:19,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:19,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81048190] [2021-08-21 11:58:19,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81048190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:19,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580171775] [2021-08-21 11:58:19,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:19,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:19,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:19,734 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) [2021-08-21 11:58:19,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 11:58:20,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:58:20,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:20,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:20,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:20,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580171775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:20,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:20,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:58:20,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150994604] [2021-08-21 11:58:20,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:58:20,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:20,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:58:20,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:58:20,495 INFO L87 Difference]: Start difference. First operand 5796 states and 16694 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) [2021-08-21 11:58:20,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:20,580 INFO L93 Difference]: Finished difference Result 6492 states and 18169 transitions. [2021-08-21 11:58:20,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 11:58:20,580 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 [2021-08-21 11:58:20,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:20,591 INFO L225 Difference]: With dead ends: 6492 [2021-08-21 11:58:20,591 INFO L226 Difference]: Without dead ends: 6489 [2021-08-21 11:58:20,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:58:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6489 states. [2021-08-21 11:58:20,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6489 to 5795. [2021-08-21 11:58:20,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 5794 states have (on average 2.8795305488436314) internal successors, (16684), 5794 states have internal predecessors, (16684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 16684 transitions. [2021-08-21 11:58:20,706 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 16684 transitions. Word has length 26 [2021-08-21 11:58:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:20,706 INFO L470 AbstractCegarLoop]: Abstraction has 5795 states and 16684 transitions. [2021-08-21 11:58:20,706 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) [2021-08-21 11:58:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 16684 transitions. [2021-08-21 11:58:20,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:20,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:20,711 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:20,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:20,924 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 [2021-08-21 11:58:20,925 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:20,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:20,925 INFO L82 PathProgramCache]: Analyzing trace with hash -919795638, now seen corresponding path program 34 times [2021-08-21 11:58:20,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:20,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350238646] [2021-08-21 11:58:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:20,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:20,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:20,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350238646] [2021-08-21 11:58:20,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350238646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:20,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164082986] [2021-08-21 11:58:20,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:21,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:21,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:21,001 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) [2021-08-21 11:58:21,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 11:58:21,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:21,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:21,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:21,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164082986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:21,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:21,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-21 11:58:21,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458853730] [2021-08-21 11:58:21,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:58:21,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:21,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:58:21,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:21,865 INFO L87 Difference]: Start difference. First operand 5795 states and 16684 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) [2021-08-21 11:58:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:22,113 INFO L93 Difference]: Finished difference Result 6497 states and 18243 transitions. [2021-08-21 11:58:22,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:58:22,114 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 [2021-08-21 11:58:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:22,125 INFO L225 Difference]: With dead ends: 6497 [2021-08-21 11:58:22,126 INFO L226 Difference]: Without dead ends: 6497 [2021-08-21 11:58:22,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:58:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6497 states. [2021-08-21 11:58:22,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6497 to 5692. [2021-08-21 11:58:22,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5692 states, 5691 states have (on average 2.870848708487085) internal successors, (16338), 5691 states have internal predecessors, (16338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 16338 transitions. [2021-08-21 11:58:22,235 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 16338 transitions. Word has length 26 [2021-08-21 11:58:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:22,235 INFO L470 AbstractCegarLoop]: Abstraction has 5692 states and 16338 transitions. [2021-08-21 11:58:22,239 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) [2021-08-21 11:58:22,239 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 16338 transitions. [2021-08-21 11:58:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:22,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:22,243 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:22,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:22,464 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 [2021-08-21 11:58:22,465 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:22,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:22,465 INFO L82 PathProgramCache]: Analyzing trace with hash -6977063, now seen corresponding path program 35 times [2021-08-21 11:58:22,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:22,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516102820] [2021-08-21 11:58:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:22,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:22,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:22,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516102820] [2021-08-21 11:58:22,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516102820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:22,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124530943] [2021-08-21 11:58:22,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:22,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:22,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:22,548 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) [2021-08-21 11:58:22,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 11:58:23,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:58:23,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:23,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:23,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:23,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124530943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:23,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:23,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-08-21 11:58:23,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617722529] [2021-08-21 11:58:23,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:58:23,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:23,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:58:23,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:23,467 INFO L87 Difference]: Start difference. First operand 5692 states and 16338 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-08-21 11:58:23,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:23,656 INFO L93 Difference]: Finished difference Result 8010 states and 22671 transitions. [2021-08-21 11:58:23,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:58:23,656 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 26 [2021-08-21 11:58:23,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:23,676 INFO L225 Difference]: With dead ends: 8010 [2021-08-21 11:58:23,677 INFO L226 Difference]: Without dead ends: 7995 [2021-08-21 11:58:23,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:23,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-08-21 11:58:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 7490. [2021-08-21 11:58:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7490 states, 7489 states have (on average 2.8919748965148884) internal successors, (21658), 7489 states have internal predecessors, (21658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 21658 transitions. [2021-08-21 11:58:23,868 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 21658 transitions. Word has length 26 [2021-08-21 11:58:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:23,868 INFO L470 AbstractCegarLoop]: Abstraction has 7490 states and 21658 transitions. [2021-08-21 11:58:23,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-08-21 11:58:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 21658 transitions. [2021-08-21 11:58:23,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:23,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:23,873 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:23,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 11:58:24,073 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 [2021-08-21 11:58:24,074 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:24,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:24,074 INFO L82 PathProgramCache]: Analyzing trace with hash -573902674, now seen corresponding path program 36 times [2021-08-21 11:58:24,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:24,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362375352] [2021-08-21 11:58:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:24,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:24,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:24,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362375352] [2021-08-21 11:58:24,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362375352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:24,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873522794] [2021-08-21 11:58:24,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:24,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:24,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:24,160 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) [2021-08-21 11:58:24,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 11:58:24,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:58:24,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:24,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:24,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:25,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873522794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:25,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:25,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-08-21 11:58:25,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434199608] [2021-08-21 11:58:25,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:25,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:25,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:25,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:25,047 INFO L87 Difference]: Start difference. First operand 7490 states and 21658 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-08-21 11:58:25,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:25,333 INFO L93 Difference]: Finished difference Result 8607 states and 24438 transitions. [2021-08-21 11:58:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:58:25,333 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 26 [2021-08-21 11:58:25,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:25,351 INFO L225 Difference]: With dead ends: 8607 [2021-08-21 11:58:25,351 INFO L226 Difference]: Without dead ends: 8607 [2021-08-21 11:58:25,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:58:25,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8607 states. [2021-08-21 11:58:25,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8607 to 6930. [2021-08-21 11:58:25,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 6929 states have (on average 2.893635445230192) internal successors, (20050), 6929 states have internal predecessors, (20050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:25,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 20050 transitions. [2021-08-21 11:58:25,526 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 20050 transitions. Word has length 26 [2021-08-21 11:58:25,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:25,526 INFO L470 AbstractCegarLoop]: Abstraction has 6930 states and 20050 transitions. [2021-08-21 11:58:25,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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) [2021-08-21 11:58:25,527 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 20050 transitions. [2021-08-21 11:58:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 11:58:25,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:25,536 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:25,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:25,754 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 [2021-08-21 11:58:25,754 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:25,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:25,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1605963187, now seen corresponding path program 37 times [2021-08-21 11:58:25,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:25,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129362779] [2021-08-21 11:58:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:25,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:25,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:25,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129362779] [2021-08-21 11:58:25,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129362779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:25,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680153734] [2021-08-21 11:58:25,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:25,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:25,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:25,824 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) [2021-08-21 11:58:25,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 11:58:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:26,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:58:26,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:26,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680153734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:26,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:26,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 11:58:26,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881268615] [2021-08-21 11:58:26,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:58:26,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:26,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:58:26,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:26,675 INFO L87 Difference]: Start difference. First operand 6930 states and 20050 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) [2021-08-21 11:58:26,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:26,807 INFO L93 Difference]: Finished difference Result 7602 states and 21466 transitions. [2021-08-21 11:58:26,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:26,807 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 [2021-08-21 11:58:26,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:26,821 INFO L225 Difference]: With dead ends: 7602 [2021-08-21 11:58:26,821 INFO L226 Difference]: Without dead ends: 7579 [2021-08-21 11:58:26,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:58:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7579 states. [2021-08-21 11:58:26,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7579 to 6963. [2021-08-21 11:58:26,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6963 states, 6962 states have (on average 2.8889686871588625) internal successors, (20113), 6962 states have internal predecessors, (20113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:26,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6963 states to 6963 states and 20113 transitions. [2021-08-21 11:58:26,949 INFO L78 Accepts]: Start accepts. Automaton has 6963 states and 20113 transitions. Word has length 26 [2021-08-21 11:58:26,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:26,950 INFO L470 AbstractCegarLoop]: Abstraction has 6963 states and 20113 transitions. [2021-08-21 11:58:26,950 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) [2021-08-21 11:58:26,950 INFO L276 IsEmpty]: Start isEmpty. Operand 6963 states and 20113 transitions. [2021-08-21 11:58:26,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:26,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:26,955 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:26,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 11:58:27,155 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 [2021-08-21 11:58:27,156 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:27,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:27,156 INFO L82 PathProgramCache]: Analyzing trace with hash -726222136, now seen corresponding path program 5 times [2021-08-21 11:58:27,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:27,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673924014] [2021-08-21 11:58:27,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:27,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:27,225 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:27,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:27,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673924014] [2021-08-21 11:58:27,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673924014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:27,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901365984] [2021-08-21 11:58:27,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:27,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:27,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:27,227 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) [2021-08-21 11:58:27,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 11:58:27,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:58:27,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:27,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:58:27,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:28,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901365984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:28,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:28,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 11:58:28,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874898411] [2021-08-21 11:58:28,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:58:28,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:28,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:58:28,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:28,037 INFO L87 Difference]: Start difference. First operand 6963 states and 20113 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) [2021-08-21 11:58:28,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:28,338 INFO L93 Difference]: Finished difference Result 7475 states and 21037 transitions. [2021-08-21 11:58:28,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:58:28,338 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 [2021-08-21 11:58:28,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:28,354 INFO L225 Difference]: With dead ends: 7475 [2021-08-21 11:58:28,354 INFO L226 Difference]: Without dead ends: 7471 [2021-08-21 11:58:28,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:58:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7471 states. [2021-08-21 11:58:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7471 to 7059. [2021-08-21 11:58:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7059 states, 7058 states have (on average 2.8620005667327857) internal successors, (20200), 7058 states have internal predecessors, (20200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:28,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7059 states to 7059 states and 20200 transitions. [2021-08-21 11:58:28,492 INFO L78 Accepts]: Start accepts. Automaton has 7059 states and 20200 transitions. Word has length 29 [2021-08-21 11:58:28,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:28,492 INFO L470 AbstractCegarLoop]: Abstraction has 7059 states and 20200 transitions. [2021-08-21 11:58:28,492 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) [2021-08-21 11:58:28,492 INFO L276 IsEmpty]: Start isEmpty. Operand 7059 states and 20200 transitions. [2021-08-21 11:58:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:28,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:28,497 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:28,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 11:58:28,700 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 [2021-08-21 11:58:28,701 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:28,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:28,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1247509848, now seen corresponding path program 38 times [2021-08-21 11:58:28,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:28,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7965494] [2021-08-21 11:58:28,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:28,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:28,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:28,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7965494] [2021-08-21 11:58:28,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7965494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:28,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539945391] [2021-08-21 11:58:28,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:28,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:28,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:28,772 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) [2021-08-21 11:58:28,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 11:58:29,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:29,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:29,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 11:58:29,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:29,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539945391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:29,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:29,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 11:58:29,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394754128] [2021-08-21 11:58:29,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:58:29,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:29,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:58:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:58:29,634 INFO L87 Difference]: Start difference. First operand 7059 states and 20200 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) [2021-08-21 11:58:29,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:29,758 INFO L93 Difference]: Finished difference Result 8152 states and 22970 transitions. [2021-08-21 11:58:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:58:29,759 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 [2021-08-21 11:58:29,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:29,775 INFO L225 Difference]: With dead ends: 8152 [2021-08-21 11:58:29,775 INFO L226 Difference]: Without dead ends: 8145 [2021-08-21 11:58:29,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:58:29,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8145 states. [2021-08-21 11:58:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8145 to 7935. [2021-08-21 11:58:29,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7935 states, 7934 states have (on average 2.8453491303251828) internal successors, (22575), 7934 states have internal predecessors, (22575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7935 states to 7935 states and 22575 transitions. [2021-08-21 11:58:29,952 INFO L78 Accepts]: Start accepts. Automaton has 7935 states and 22575 transitions. Word has length 29 [2021-08-21 11:58:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:29,952 INFO L470 AbstractCegarLoop]: Abstraction has 7935 states and 22575 transitions. [2021-08-21 11:58:29,952 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) [2021-08-21 11:58:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 7935 states and 22575 transitions. [2021-08-21 11:58:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:29,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:29,958 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:29,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 11:58:30,158 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 [2021-08-21 11:58:30,159 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:30,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:30,159 INFO L82 PathProgramCache]: Analyzing trace with hash 806035714, now seen corresponding path program 39 times [2021-08-21 11:58:30,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:30,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371834802] [2021-08-21 11:58:30,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:30,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 11:58:30,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:30,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371834802] [2021-08-21 11:58:30,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371834802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:30,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282283935] [2021-08-21 11:58:30,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:30,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:30,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:30,217 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) [2021-08-21 11:58:30,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 11:58:30,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:58:30,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:30,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:58:30,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 11:58:31,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282283935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:31,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:31,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2021-08-21 11:58:31,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79096196] [2021-08-21 11:58:31,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:58:31,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:31,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:58:31,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:58:31,321 INFO L87 Difference]: Start difference. First operand 7935 states and 22575 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) [2021-08-21 11:58:32,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:32,151 INFO L93 Difference]: Finished difference Result 18457 states and 50779 transitions. [2021-08-21 11:58:32,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 11:58:32,152 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 29 [2021-08-21 11:58:32,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:32,196 INFO L225 Difference]: With dead ends: 18457 [2021-08-21 11:58:32,196 INFO L226 Difference]: Without dead ends: 18374 [2021-08-21 11:58:32,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 443.6ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:58:32,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18374 states. [2021-08-21 11:58:32,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18374 to 11188. [2021-08-21 11:58:32,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11188 states, 11187 states have (on average 2.9059622776436935) internal successors, (32509), 11187 states have internal predecessors, (32509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:32,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11188 states to 11188 states and 32509 transitions. [2021-08-21 11:58:32,530 INFO L78 Accepts]: Start accepts. Automaton has 11188 states and 32509 transitions. Word has length 29 [2021-08-21 11:58:32,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:32,531 INFO L470 AbstractCegarLoop]: Abstraction has 11188 states and 32509 transitions. [2021-08-21 11:58:32,531 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) [2021-08-21 11:58:32,531 INFO L276 IsEmpty]: Start isEmpty. Operand 11188 states and 32509 transitions. [2021-08-21 11:58:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:32,537 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:32,537 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:32,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 11:58:32,738 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 [2021-08-21 11:58:32,738 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:32,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:32,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1294668488, now seen corresponding path program 6 times [2021-08-21 11:58:32,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:32,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566853248] [2021-08-21 11:58:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:32,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:32,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:32,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566853248] [2021-08-21 11:58:32,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566853248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:32,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541685600] [2021-08-21 11:58:32,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:32,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:32,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:32,837 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) [2021-08-21 11:58:32,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 11:58:33,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:58:33,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:33,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 11:58:33,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:33,907 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-21 11:58:33,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2021-08-21 11:58:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:33,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541685600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:33,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:33,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 11:58:33,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236964761] [2021-08-21 11:58:33,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:58:33,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:33,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:58:33,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:33,926 INFO L87 Difference]: Start difference. First operand 11188 states and 32509 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:34,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:34,250 INFO L93 Difference]: Finished difference Result 7742 states and 21345 transitions. [2021-08-21 11:58:34,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:34,251 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 11:58:34,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:34,266 INFO L225 Difference]: With dead ends: 7742 [2021-08-21 11:58:34,266 INFO L226 Difference]: Without dead ends: 7597 [2021-08-21 11:58:34,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:34,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7597 states. [2021-08-21 11:58:34,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7597 to 4248. [2021-08-21 11:58:34,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 4247 states have (on average 2.8704968212856135) internal successors, (12191), 4247 states have internal predecessors, (12191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 12191 transitions. [2021-08-21 11:58:34,355 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 12191 transitions. Word has length 29 [2021-08-21 11:58:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:34,356 INFO L470 AbstractCegarLoop]: Abstraction has 4248 states and 12191 transitions. [2021-08-21 11:58:34,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:34,356 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 12191 transitions. [2021-08-21 11:58:34,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:34,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:34,360 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:34,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 11:58:34,580 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 [2021-08-21 11:58:34,580 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:34,581 INFO L82 PathProgramCache]: Analyzing trace with hash 850939720, now seen corresponding path program 7 times [2021-08-21 11:58:34,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:34,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950335740] [2021-08-21 11:58:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:34,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:34,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:34,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950335740] [2021-08-21 11:58:34,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950335740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:34,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218111687] [2021-08-21 11:58:34,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:34,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:34,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:34,673 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) [2021-08-21 11:58:34,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 11:58:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:35,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:58:35,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:35,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218111687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:35,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:35,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:58:35,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235183603] [2021-08-21 11:58:35,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:58:35,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:35,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:58:35,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:58:35,578 INFO L87 Difference]: Start difference. First operand 4248 states and 12191 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) [2021-08-21 11:58:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:35,676 INFO L93 Difference]: Finished difference Result 4352 states and 12414 transitions. [2021-08-21 11:58:35,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:35,677 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 [2021-08-21 11:58:35,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:35,684 INFO L225 Difference]: With dead ends: 4352 [2021-08-21 11:58:35,684 INFO L226 Difference]: Without dead ends: 4352 [2021-08-21 11:58:35,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:35,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-08-21 11:58:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 4274. [2021-08-21 11:58:35,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4274 states, 4273 states have (on average 2.8673063421483733) internal successors, (12252), 4273 states have internal predecessors, (12252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4274 states to 4274 states and 12252 transitions. [2021-08-21 11:58:35,748 INFO L78 Accepts]: Start accepts. Automaton has 4274 states and 12252 transitions. Word has length 29 [2021-08-21 11:58:35,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:35,748 INFO L470 AbstractCegarLoop]: Abstraction has 4274 states and 12252 transitions. [2021-08-21 11:58:35,748 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) [2021-08-21 11:58:35,748 INFO L276 IsEmpty]: Start isEmpty. Operand 4274 states and 12252 transitions. [2021-08-21 11:58:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:35,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:35,752 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:35,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:35,952 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 [2021-08-21 11:58:35,953 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:35,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:35,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1992594714, now seen corresponding path program 6 times [2021-08-21 11:58:35,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:35,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357976093] [2021-08-21 11:58:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:35,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:58:36,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:36,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357976093] [2021-08-21 11:58:36,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357976093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:36,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262289115] [2021-08-21 11:58:36,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:36,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:36,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:36,038 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) [2021-08-21 11:58:36,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 11:58:36,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 11:58:36,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:36,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:58:36,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:58:36,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262289115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:36,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:36,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:58:36,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854202149] [2021-08-21 11:58:36,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:58:36,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:36,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:58:36,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:58:36,960 INFO L87 Difference]: Start difference. First operand 4274 states and 12252 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) [2021-08-21 11:58:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:37,090 INFO L93 Difference]: Finished difference Result 4713 states and 13141 transitions. [2021-08-21 11:58:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:37,091 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 [2021-08-21 11:58:37,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:37,099 INFO L225 Difference]: With dead ends: 4713 [2021-08-21 11:58:37,099 INFO L226 Difference]: Without dead ends: 4698 [2021-08-21 11:58:37,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:37,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2021-08-21 11:58:37,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 4364. [2021-08-21 11:58:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4364 states, 4363 states have (on average 2.854457941783177) internal successors, (12454), 4363 states have internal predecessors, (12454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:37,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4364 states to 4364 states and 12454 transitions. [2021-08-21 11:58:37,164 INFO L78 Accepts]: Start accepts. Automaton has 4364 states and 12454 transitions. Word has length 29 [2021-08-21 11:58:37,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:37,164 INFO L470 AbstractCegarLoop]: Abstraction has 4364 states and 12454 transitions. [2021-08-21 11:58:37,164 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) [2021-08-21 11:58:37,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4364 states and 12454 transitions. [2021-08-21 11:58:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:37,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:37,167 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:37,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:37,368 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 [2021-08-21 11:58:37,368 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:37,369 INFO L82 PathProgramCache]: Analyzing trace with hash -492261722, now seen corresponding path program 8 times [2021-08-21 11:58:37,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:37,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873591331] [2021-08-21 11:58:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:37,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:58:37,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:37,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873591331] [2021-08-21 11:58:37,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873591331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:37,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426212467] [2021-08-21 11:58:37,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:37,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:37,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:37,457 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) [2021-08-21 11:58:37,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 11:58:38,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:38,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:38,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:58:38,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:58:38,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426212467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:38,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:38,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 11:58:38,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890714585] [2021-08-21 11:58:38,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:58:38,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:38,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:58:38,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:58:38,404 INFO L87 Difference]: Start difference. First operand 4364 states and 12454 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) [2021-08-21 11:58:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:38,570 INFO L93 Difference]: Finished difference Result 4628 states and 12889 transitions. [2021-08-21 11:58:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:38,571 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 [2021-08-21 11:58:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:38,578 INFO L225 Difference]: With dead ends: 4628 [2021-08-21 11:58:38,579 INFO L226 Difference]: Without dead ends: 4544 [2021-08-21 11:58:38,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:38,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4544 states. [2021-08-21 11:58:38,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4544 to 4282. [2021-08-21 11:58:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4282 states, 4281 states have (on average 2.8409250175192713) internal successors, (12162), 4281 states have internal predecessors, (12162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4282 states to 4282 states and 12162 transitions. [2021-08-21 11:58:38,644 INFO L78 Accepts]: Start accepts. Automaton has 4282 states and 12162 transitions. Word has length 29 [2021-08-21 11:58:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:38,645 INFO L470 AbstractCegarLoop]: Abstraction has 4282 states and 12162 transitions. [2021-08-21 11:58:38,645 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) [2021-08-21 11:58:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 4282 states and 12162 transitions. [2021-08-21 11:58:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:38,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:38,648 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:38,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 11:58:38,848 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 [2021-08-21 11:58:38,849 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:38,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1105797902, now seen corresponding path program 9 times [2021-08-21 11:58:38,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:38,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142636851] [2021-08-21 11:58:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:38,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 11:58:38,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:38,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142636851] [2021-08-21 11:58:38,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142636851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:38,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91209126] [2021-08-21 11:58:38,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:58:38,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:38,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:38,935 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) [2021-08-21 11:58:38,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 11:58:39,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 11:58:39,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:39,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:58:39,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 11:58:39,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91209126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:39,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:39,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:58:39,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3304201] [2021-08-21 11:58:39,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:58:39,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:39,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:58:39,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:58:39,868 INFO L87 Difference]: Start difference. First operand 4282 states and 12162 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) [2021-08-21 11:58:39,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:39,995 INFO L93 Difference]: Finished difference Result 4840 states and 13446 transitions. [2021-08-21 11:58:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:39,995 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 [2021-08-21 11:58:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:40,004 INFO L225 Difference]: With dead ends: 4840 [2021-08-21 11:58:40,004 INFO L226 Difference]: Without dead ends: 4828 [2021-08-21 11:58:40,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:40,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-08-21 11:58:40,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4562. [2021-08-21 11:58:40,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4562 states, 4561 states have (on average 2.8241613681210262) internal successors, (12881), 4561 states have internal predecessors, (12881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4562 states to 4562 states and 12881 transitions. [2021-08-21 11:58:40,089 INFO L78 Accepts]: Start accepts. Automaton has 4562 states and 12881 transitions. Word has length 29 [2021-08-21 11:58:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:40,089 INFO L470 AbstractCegarLoop]: Abstraction has 4562 states and 12881 transitions. [2021-08-21 11:58:40,089 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) [2021-08-21 11:58:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 4562 states and 12881 transitions. [2021-08-21 11:58:40,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:40,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:40,093 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:40,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:40,293 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 [2021-08-21 11:58:40,293 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:40,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:40,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2014627176, now seen corresponding path program 40 times [2021-08-21 11:58:40,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:40,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503670418] [2021-08-21 11:58:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:40,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 11:58:40,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:40,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503670418] [2021-08-21 11:58:40,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503670418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:40,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088459296] [2021-08-21 11:58:40,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:40,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:40,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:40,387 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) [2021-08-21 11:58:40,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 11:58:41,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:41,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:41,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 11:58:41,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 11:58:41,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088459296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:41,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:41,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 11:58:41,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320074278] [2021-08-21 11:58:41,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:58:41,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:41,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:58:41,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:58:41,442 INFO L87 Difference]: Start difference. First operand 4562 states and 12881 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) [2021-08-21 11:58:41,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:41,552 INFO L93 Difference]: Finished difference Result 5800 states and 16283 transitions. [2021-08-21 11:58:41,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:58:41,552 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 [2021-08-21 11:58:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:41,562 INFO L225 Difference]: With dead ends: 5800 [2021-08-21 11:58:41,562 INFO L226 Difference]: Without dead ends: 5787 [2021-08-21 11:58:41,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:58:41,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5787 states. [2021-08-21 11:58:41,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5787 to 5472. [2021-08-21 11:58:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5472 states, 5471 states have (on average 2.854322792908061) internal successors, (15616), 5471 states have internal predecessors, (15616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5472 states to 5472 states and 15616 transitions. [2021-08-21 11:58:41,650 INFO L78 Accepts]: Start accepts. Automaton has 5472 states and 15616 transitions. Word has length 29 [2021-08-21 11:58:41,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:41,650 INFO L470 AbstractCegarLoop]: Abstraction has 5472 states and 15616 transitions. [2021-08-21 11:58:41,650 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) [2021-08-21 11:58:41,650 INFO L276 IsEmpty]: Start isEmpty. Operand 5472 states and 15616 transitions. [2021-08-21 11:58:41,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:41,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:41,654 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:41,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 11:58:41,856 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 [2021-08-21 11:58:41,857 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:41,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:41,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1036119432, now seen corresponding path program 10 times [2021-08-21 11:58:41,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:41,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242331903] [2021-08-21 11:58:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:41,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:41,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:41,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242331903] [2021-08-21 11:58:41,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242331903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:41,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675168881] [2021-08-21 11:58:41,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:58:41,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:41,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:41,932 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) [2021-08-21 11:58:41,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 11:58:42,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:58:42,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:42,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 11:58:42,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:42,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 11:58:42,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-21 11:58:42,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 11:58:42,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-21 11:58:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:42,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675168881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:42,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:42,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 11:58:42,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100971296] [2021-08-21 11:58:42,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:58:42,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:42,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:58:42,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:58:42,975 INFO L87 Difference]: Start difference. First operand 5472 states and 15616 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-08-21 11:58:43,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:43,304 INFO L93 Difference]: Finished difference Result 9453 states and 26211 transitions. [2021-08-21 11:58:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:58:43,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 29 [2021-08-21 11:58:43,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:43,323 INFO L225 Difference]: With dead ends: 9453 [2021-08-21 11:58:43,323 INFO L226 Difference]: Without dead ends: 9426 [2021-08-21 11:58:43,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:58:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9426 states. [2021-08-21 11:58:43,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9426 to 8349. [2021-08-21 11:58:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8349 states, 8348 states have (on average 2.843675131768088) internal successors, (23739), 8348 states have internal predecessors, (23739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:43,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8349 states to 8349 states and 23739 transitions. [2021-08-21 11:58:43,483 INFO L78 Accepts]: Start accepts. Automaton has 8349 states and 23739 transitions. Word has length 29 [2021-08-21 11:58:43,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:43,484 INFO L470 AbstractCegarLoop]: Abstraction has 8349 states and 23739 transitions. [2021-08-21 11:58:43,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-08-21 11:58:43,484 INFO L276 IsEmpty]: Start isEmpty. Operand 8349 states and 23739 transitions. [2021-08-21 11:58:43,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:43,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:43,488 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:43,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 11:58:43,704 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 [2021-08-21 11:58:43,705 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:43,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:43,705 INFO L82 PathProgramCache]: Analyzing trace with hash -188205470, now seen corresponding path program 7 times [2021-08-21 11:58:43,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:43,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596556491] [2021-08-21 11:58:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:43,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:43,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:43,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596556491] [2021-08-21 11:58:43,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596556491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:43,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296723849] [2021-08-21 11:58:43,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:43,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:43,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:43,777 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) [2021-08-21 11:58:43,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 11:58:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:44,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 11:58:44,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:44,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 11:58:44,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-21 11:58:44,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 11:58:44,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-08-21 11:58:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:44,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296723849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:44,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:44,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 11:58:44,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295519482] [2021-08-21 11:58:44,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:58:44,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:44,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:58:44,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:58:44,881 INFO L87 Difference]: Start difference. First operand 8349 states and 23739 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) [2021-08-21 11:58:45,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:45,175 INFO L93 Difference]: Finished difference Result 9430 states and 26142 transitions. [2021-08-21 11:58:45,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:58:45,176 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 29 [2021-08-21 11:58:45,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:45,195 INFO L225 Difference]: With dead ends: 9430 [2021-08-21 11:58:45,195 INFO L226 Difference]: Without dead ends: 9399 [2021-08-21 11:58:45,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:58:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9399 states. [2021-08-21 11:58:45,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9399 to 8709. [2021-08-21 11:58:45,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8709 states, 8708 states have (on average 2.833256775378962) internal successors, (24672), 8708 states have internal predecessors, (24672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8709 states to 8709 states and 24672 transitions. [2021-08-21 11:58:45,387 INFO L78 Accepts]: Start accepts. Automaton has 8709 states and 24672 transitions. Word has length 29 [2021-08-21 11:58:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:45,387 INFO L470 AbstractCegarLoop]: Abstraction has 8709 states and 24672 transitions. [2021-08-21 11:58:45,387 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) [2021-08-21 11:58:45,387 INFO L276 IsEmpty]: Start isEmpty. Operand 8709 states and 24672 transitions. [2021-08-21 11:58:45,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:45,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:45,392 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:45,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 11:58:45,593 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 [2021-08-21 11:58:45,593 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:45,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1821501854, now seen corresponding path program 11 times [2021-08-21 11:58:45,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:45,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595453723] [2021-08-21 11:58:45,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:45,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:45,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:45,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595453723] [2021-08-21 11:58:45,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595453723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:45,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824041309] [2021-08-21 11:58:45,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:45,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:45,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:45,689 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) [2021-08-21 11:58:45,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 11:58:46,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:58:46,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:46,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:58:46,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:46,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824041309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:46,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:46,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 11:58:46,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666760820] [2021-08-21 11:58:46,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:58:46,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:46,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:58:46,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:46,806 INFO L87 Difference]: Start difference. First operand 8709 states and 24672 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) [2021-08-21 11:58:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:47,001 INFO L93 Difference]: Finished difference Result 8594 states and 24281 transitions. [2021-08-21 11:58:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 11:58:47,002 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 29 [2021-08-21 11:58:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:47,019 INFO L225 Difference]: With dead ends: 8594 [2021-08-21 11:58:47,019 INFO L226 Difference]: Without dead ends: 8560 [2021-08-21 11:58:47,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:47,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8560 states. [2021-08-21 11:58:47,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8560 to 8306. [2021-08-21 11:58:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8306 states, 8305 states have (on average 2.8570740517760385) internal successors, (23728), 8305 states have internal predecessors, (23728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:47,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8306 states to 8306 states and 23728 transitions. [2021-08-21 11:58:47,160 INFO L78 Accepts]: Start accepts. Automaton has 8306 states and 23728 transitions. Word has length 29 [2021-08-21 11:58:47,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:47,160 INFO L470 AbstractCegarLoop]: Abstraction has 8306 states and 23728 transitions. [2021-08-21 11:58:47,160 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) [2021-08-21 11:58:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand 8306 states and 23728 transitions. [2021-08-21 11:58:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:47,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:47,165 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:47,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 11:58:47,365 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 [2021-08-21 11:58:47,365 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:47,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:47,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1968094858, now seen corresponding path program 8 times [2021-08-21 11:58:47,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:47,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559646942] [2021-08-21 11:58:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:47,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:47,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:47,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559646942] [2021-08-21 11:58:47,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559646942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:47,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133212274] [2021-08-21 11:58:47,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:47,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:47,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:47,452 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) [2021-08-21 11:58:47,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 11:58:48,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:48,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:48,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:58:48,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:48,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133212274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:48,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:48,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 11:58:48,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692833569] [2021-08-21 11:58:48,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:58:48,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:48,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:58:48,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:58:48,588 INFO L87 Difference]: Start difference. First operand 8306 states and 23728 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) [2021-08-21 11:58:48,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:48,738 INFO L93 Difference]: Finished difference Result 8693 states and 24496 transitions. [2021-08-21 11:58:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:48,738 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 [2021-08-21 11:58:48,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:48,755 INFO L225 Difference]: With dead ends: 8693 [2021-08-21 11:58:48,755 INFO L226 Difference]: Without dead ends: 8685 [2021-08-21 11:58:48,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8685 states. [2021-08-21 11:58:48,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8685 to 8359. [2021-08-21 11:58:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8359 states, 8358 states have (on average 2.851519502273271) internal successors, (23833), 8358 states have internal predecessors, (23833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8359 states to 8359 states and 23833 transitions. [2021-08-21 11:58:48,904 INFO L78 Accepts]: Start accepts. Automaton has 8359 states and 23833 transitions. Word has length 29 [2021-08-21 11:58:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:48,904 INFO L470 AbstractCegarLoop]: Abstraction has 8359 states and 23833 transitions. [2021-08-21 11:58:48,904 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) [2021-08-21 11:58:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 8359 states and 23833 transitions. [2021-08-21 11:58:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:48,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:48,908 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:48,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:49,124 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 [2021-08-21 11:58:49,125 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:49,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash -826539446, now seen corresponding path program 12 times [2021-08-21 11:58:49,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:49,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144770716] [2021-08-21 11:58:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:49,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:49,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:49,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144770716] [2021-08-21 11:58:49,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144770716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:49,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990067841] [2021-08-21 11:58:49,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:49,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:49,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:49,205 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) [2021-08-21 11:58:49,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 11:58:50,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:58:50,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:50,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 11:58:50,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:50,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990067841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:50,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:50,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 11:58:50,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975569784] [2021-08-21 11:58:50,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:58:50,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:50,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:58:50,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:58:50,293 INFO L87 Difference]: Start difference. First operand 8359 states and 23833 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) [2021-08-21 11:58:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:50,472 INFO L93 Difference]: Finished difference Result 7859 states and 21966 transitions. [2021-08-21 11:58:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 11:58:50,475 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 [2021-08-21 11:58:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:50,492 INFO L225 Difference]: With dead ends: 7859 [2021-08-21 11:58:50,492 INFO L226 Difference]: Without dead ends: 7738 [2021-08-21 11:58:50,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:50,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7738 states. [2021-08-21 11:58:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7738 to 7313. [2021-08-21 11:58:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7313 states, 7312 states have (on average 2.8414934354485775) internal successors, (20777), 7312 states have internal predecessors, (20777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7313 states to 7313 states and 20777 transitions. [2021-08-21 11:58:50,629 INFO L78 Accepts]: Start accepts. Automaton has 7313 states and 20777 transitions. Word has length 29 [2021-08-21 11:58:50,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:50,630 INFO L470 AbstractCegarLoop]: Abstraction has 7313 states and 20777 transitions. [2021-08-21 11:58:50,630 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) [2021-08-21 11:58:50,630 INFO L276 IsEmpty]: Start isEmpty. Operand 7313 states and 20777 transitions. [2021-08-21 11:58:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:50,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:50,634 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:50,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:50,849 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 [2021-08-21 11:58:50,849 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:50,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1835185986, now seen corresponding path program 41 times [2021-08-21 11:58:50,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:50,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533458555] [2021-08-21 11:58:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:50,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:50,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:50,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533458555] [2021-08-21 11:58:50,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533458555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:50,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809009716] [2021-08-21 11:58:50,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:58:50,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:50,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:50,909 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) [2021-08-21 11:58:50,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 11:58:51,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 11:58:51,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:51,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 11:58:51,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:58:52,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809009716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:52,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:52,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 11:58:52,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355467733] [2021-08-21 11:58:52,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:58:52,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:52,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:58:52,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:58:52,058 INFO L87 Difference]: Start difference. First operand 7313 states and 20777 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) [2021-08-21 11:58:52,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:52,184 INFO L93 Difference]: Finished difference Result 9281 states and 26419 transitions. [2021-08-21 11:58:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:58:52,184 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 [2021-08-21 11:58:52,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:52,203 INFO L225 Difference]: With dead ends: 9281 [2021-08-21 11:58:52,204 INFO L226 Difference]: Without dead ends: 9268 [2021-08-21 11:58:52,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:58:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9268 states. [2021-08-21 11:58:52,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9268 to 8989. [2021-08-21 11:58:52,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8989 states, 8988 states have (on average 2.875611927013796) internal successors, (25846), 8988 states have internal predecessors, (25846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8989 states to 8989 states and 25846 transitions. [2021-08-21 11:58:52,365 INFO L78 Accepts]: Start accepts. Automaton has 8989 states and 25846 transitions. Word has length 29 [2021-08-21 11:58:52,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:52,365 INFO L470 AbstractCegarLoop]: Abstraction has 8989 states and 25846 transitions. [2021-08-21 11:58:52,365 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) [2021-08-21 11:58:52,365 INFO L276 IsEmpty]: Start isEmpty. Operand 8989 states and 25846 transitions. [2021-08-21 11:58:52,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 11:58:52,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:52,370 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:52,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:52,570 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 [2021-08-21 11:58:52,571 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:52,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:52,571 INFO L82 PathProgramCache]: Analyzing trace with hash 856678242, now seen corresponding path program 13 times [2021-08-21 11:58:52,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:52,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858957682] [2021-08-21 11:58:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:52,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:52,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:52,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858957682] [2021-08-21 11:58:52,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858957682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:52,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522759848] [2021-08-21 11:58:52,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:52,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:52,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:52,653 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) [2021-08-21 11:58:52,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 11:58:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:53,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:58:53,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:53,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522759848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:53,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:53,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 11:58:53,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835457133] [2021-08-21 11:58:53,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:58:53,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:53,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:58:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:53,761 INFO L87 Difference]: Start difference. First operand 8989 states and 25846 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) [2021-08-21 11:58:53,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:53,943 INFO L93 Difference]: Finished difference Result 7671 states and 21813 transitions. [2021-08-21 11:58:53,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:58:53,943 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 [2021-08-21 11:58:53,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:53,958 INFO L225 Difference]: With dead ends: 7671 [2021-08-21 11:58:53,958 INFO L226 Difference]: Without dead ends: 7617 [2021-08-21 11:58:53,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:58:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7617 states. [2021-08-21 11:58:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7617 to 7264. [2021-08-21 11:58:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7264 states, 7263 states have (on average 2.87870026159989) internal successors, (20908), 7263 states have internal predecessors, (20908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7264 states to 7264 states and 20908 transitions. [2021-08-21 11:58:54,118 INFO L78 Accepts]: Start accepts. Automaton has 7264 states and 20908 transitions. Word has length 29 [2021-08-21 11:58:54,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:54,118 INFO L470 AbstractCegarLoop]: Abstraction has 7264 states and 20908 transitions. [2021-08-21 11:58:54,118 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) [2021-08-21 11:58:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 7264 states and 20908 transitions. [2021-08-21 11:58:54,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:54,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:54,123 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:54,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 11:58:54,323 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 [2021-08-21 11:58:54,323 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:54,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:54,324 INFO L82 PathProgramCache]: Analyzing trace with hash -792536658, now seen corresponding path program 42 times [2021-08-21 11:58:54,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:54,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792085509] [2021-08-21 11:58:54,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:54,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:54,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:54,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792085509] [2021-08-21 11:58:54,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792085509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:54,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250055110] [2021-08-21 11:58:54,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:58:54,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:54,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:54,438 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) [2021-08-21 11:58:54,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 11:58:55,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 11:58:55,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:55,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:58:55,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:55,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250055110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:55,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:55,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 11:58:55,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809287391] [2021-08-21 11:58:55,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:58:55,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:55,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:58:55,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:55,615 INFO L87 Difference]: Start difference. First operand 7264 states and 20908 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) [2021-08-21 11:58:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:55,937 INFO L93 Difference]: Finished difference Result 7795 states and 21950 transitions. [2021-08-21 11:58:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:58:55,938 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 32 [2021-08-21 11:58:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:55,958 INFO L225 Difference]: With dead ends: 7795 [2021-08-21 11:58:55,958 INFO L226 Difference]: Without dead ends: 7795 [2021-08-21 11:58:55,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:58:55,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7795 states. [2021-08-21 11:58:56,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7795 to 7230. [2021-08-21 11:58:56,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7230 states, 7229 states have (on average 2.8781297551528566) internal successors, (20806), 7229 states have internal predecessors, (20806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 20806 transitions. [2021-08-21 11:58:56,194 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 20806 transitions. Word has length 32 [2021-08-21 11:58:56,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:56,194 INFO L470 AbstractCegarLoop]: Abstraction has 7230 states and 20806 transitions. [2021-08-21 11:58:56,194 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) [2021-08-21 11:58:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 20806 transitions. [2021-08-21 11:58:56,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:56,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:56,200 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:56,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 11:58:56,417 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 [2021-08-21 11:58:56,417 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:56,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1038956229, now seen corresponding path program 43 times [2021-08-21 11:58:56,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:56,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051220409] [2021-08-21 11:58:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:56,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:56,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:56,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051220409] [2021-08-21 11:58:56,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051220409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:56,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086170198] [2021-08-21 11:58:56,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:58:56,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:56,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:56,527 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) [2021-08-21 11:58:56,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 11:58:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:57,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:58:57,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:58:57,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086170198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:57,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:57,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-08-21 11:58:57,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087908650] [2021-08-21 11:58:57,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:58:57,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:57,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:58:57,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:58:57,691 INFO L87 Difference]: Start difference. First operand 7230 states and 20806 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) [2021-08-21 11:58:57,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:57,878 INFO L93 Difference]: Finished difference Result 9791 states and 27150 transitions. [2021-08-21 11:58:57,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:58:57,879 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 32 [2021-08-21 11:58:57,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:57,898 INFO L225 Difference]: With dead ends: 9791 [2021-08-21 11:58:57,898 INFO L226 Difference]: Without dead ends: 9767 [2021-08-21 11:58:57,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:58:57,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-08-21 11:58:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 8255. [2021-08-21 11:58:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8255 states, 8254 states have (on average 2.8838139084080447) internal successors, (23803), 8254 states have internal predecessors, (23803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:58,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8255 states to 8255 states and 23803 transitions. [2021-08-21 11:58:58,056 INFO L78 Accepts]: Start accepts. Automaton has 8255 states and 23803 transitions. Word has length 32 [2021-08-21 11:58:58,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:58,056 INFO L470 AbstractCegarLoop]: Abstraction has 8255 states and 23803 transitions. [2021-08-21 11:58:58,056 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) [2021-08-21 11:58:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 8255 states and 23803 transitions. [2021-08-21 11:58:58,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:58,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:58,062 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:58,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 11:58:58,262 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 [2021-08-21 11:58:58,263 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:58:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:58:58,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1188862303, now seen corresponding path program 44 times [2021-08-21 11:58:58,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:58:58,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579957247] [2021-08-21 11:58:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:58:58,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:58:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:58:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:58,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:58:58,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579957247] [2021-08-21 11:58:58,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579957247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:58,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684934684] [2021-08-21 11:58:58,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:58:58,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:58:58,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:58:58,334 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) [2021-08-21 11:58:58,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 11:58:59,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:58:59,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:58:59,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:58:59,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:58:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:58:59,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684934684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:58:59,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:58:59,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 11:58:59,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862890672] [2021-08-21 11:58:59,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:58:59,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:58:59,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:58:59,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:58:59,507 INFO L87 Difference]: Start difference. First operand 8255 states and 23803 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-08-21 11:58:59,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:58:59,709 INFO L93 Difference]: Finished difference Result 9757 states and 27018 transitions. [2021-08-21 11:58:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:58:59,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 32 [2021-08-21 11:58:59,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:58:59,728 INFO L225 Difference]: With dead ends: 9757 [2021-08-21 11:58:59,728 INFO L226 Difference]: Without dead ends: 9757 [2021-08-21 11:58:59,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:58:59,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2021-08-21 11:58:59,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 8079. [2021-08-21 11:58:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8079 states, 8078 states have (on average 2.877940084179252) internal successors, (23248), 8078 states have internal predecessors, (23248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:58:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8079 states to 8079 states and 23248 transitions. [2021-08-21 11:58:59,887 INFO L78 Accepts]: Start accepts. Automaton has 8079 states and 23248 transitions. Word has length 32 [2021-08-21 11:58:59,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:58:59,887 INFO L470 AbstractCegarLoop]: Abstraction has 8079 states and 23248 transitions. [2021-08-21 11:58:59,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-08-21 11:58:59,887 INFO L276 IsEmpty]: Start isEmpty. Operand 8079 states and 23248 transitions. [2021-08-21 11:58:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:58:59,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:58:59,892 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:58:59,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-21 11:59:00,093 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 [2021-08-21 11:59:00,093 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:00,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:00,094 INFO L82 PathProgramCache]: Analyzing trace with hash -2120678750, now seen corresponding path program 45 times [2021-08-21 11:59:00,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:00,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323680522] [2021-08-21 11:59:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:00,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:00,167 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:00,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:00,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323680522] [2021-08-21 11:59:00,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323680522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:00,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509671913] [2021-08-21 11:59:00,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:00,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:00,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:00,177 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) [2021-08-21 11:59:00,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 11:59:01,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:59:01,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:01,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:59:01,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 11:59:01,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509671913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:01,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:01,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 11:59:01,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286761347] [2021-08-21 11:59:01,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:59:01,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:01,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:59:01,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:01,623 INFO L87 Difference]: Start difference. First operand 8079 states and 23248 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) [2021-08-21 11:59:02,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:02,070 INFO L93 Difference]: Finished difference Result 9017 states and 25037 transitions. [2021-08-21 11:59:02,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 11:59:02,071 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 32 [2021-08-21 11:59:02,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:02,088 INFO L225 Difference]: With dead ends: 9017 [2021-08-21 11:59:02,088 INFO L226 Difference]: Without dead ends: 8974 [2021-08-21 11:59:02,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 319.2ms TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-08-21 11:59:02,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8974 states. [2021-08-21 11:59:02,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8974 to 8285. [2021-08-21 11:59:02,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8285 states, 8284 states have (on average 2.8491067117334623) internal successors, (23602), 8284 states have internal predecessors, (23602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:02,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8285 states to 8285 states and 23602 transitions. [2021-08-21 11:59:02,231 INFO L78 Accepts]: Start accepts. Automaton has 8285 states and 23602 transitions. Word has length 32 [2021-08-21 11:59:02,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:02,231 INFO L470 AbstractCegarLoop]: Abstraction has 8285 states and 23602 transitions. [2021-08-21 11:59:02,231 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) [2021-08-21 11:59:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 8285 states and 23602 transitions. [2021-08-21 11:59:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:59:02,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:02,237 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:02,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 11:59:02,437 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 [2021-08-21 11:59:02,437 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:02,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2101483961, now seen corresponding path program 46 times [2021-08-21 11:59:02,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:02,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133017564] [2021-08-21 11:59:02,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:02,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:02,527 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:02,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:02,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133017564] [2021-08-21 11:59:02,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133017564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:02,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550451981] [2021-08-21 11:59:02,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:02,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:02,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:02,528 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) [2021-08-21 11:59:02,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 11:59:03,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:03,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:03,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:59:03,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:03,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550451981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:03,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:03,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 11:59:03,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510827822] [2021-08-21 11:59:03,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:59:03,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:03,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:59:03,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:03,784 INFO L87 Difference]: Start difference. First operand 8285 states and 23602 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) [2021-08-21 11:59:04,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:04,033 INFO L93 Difference]: Finished difference Result 14005 states and 38761 transitions. [2021-08-21 11:59:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:59:04,034 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 32 [2021-08-21 11:59:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:04,065 INFO L225 Difference]: With dead ends: 14005 [2021-08-21 11:59:04,065 INFO L226 Difference]: Without dead ends: 14005 [2021-08-21 11:59:04,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:59:04,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14005 states. [2021-08-21 11:59:04,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14005 to 11430. [2021-08-21 11:59:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11430 states, 11429 states have (on average 2.8950914340712224) internal successors, (33088), 11429 states have internal predecessors, (33088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11430 states to 11430 states and 33088 transitions. [2021-08-21 11:59:04,305 INFO L78 Accepts]: Start accepts. Automaton has 11430 states and 33088 transitions. Word has length 32 [2021-08-21 11:59:04,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:04,306 INFO L470 AbstractCegarLoop]: Abstraction has 11430 states and 33088 transitions. [2021-08-21 11:59:04,306 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) [2021-08-21 11:59:04,306 INFO L276 IsEmpty]: Start isEmpty. Operand 11430 states and 33088 transitions. [2021-08-21 11:59:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:59:04,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:04,311 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:04,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:04,511 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 [2021-08-21 11:59:04,512 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:04,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2004808120, now seen corresponding path program 47 times [2021-08-21 11:59:04,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:04,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411287455] [2021-08-21 11:59:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:04,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:04,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:04,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411287455] [2021-08-21 11:59:04,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411287455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:04,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103899657] [2021-08-21 11:59:04,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:04,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:04,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:04,589 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) [2021-08-21 11:59:04,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 11:59:05,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 11:59:05,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:05,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:59:05,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:05,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103899657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:05,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:05,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 11:59:05,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222375207] [2021-08-21 11:59:05,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:59:05,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:05,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:59:05,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:05,861 INFO L87 Difference]: Start difference. First operand 11430 states and 33088 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:06,086 INFO L93 Difference]: Finished difference Result 12548 states and 35366 transitions. [2021-08-21 11:59:06,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:59:06,087 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 11:59:06,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:06,114 INFO L225 Difference]: With dead ends: 12548 [2021-08-21 11:59:06,114 INFO L226 Difference]: Without dead ends: 12548 [2021-08-21 11:59:06,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:06,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12548 states. [2021-08-21 11:59:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12548 to 11416. [2021-08-21 11:59:06,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11416 states, 11415 states have (on average 2.8823477879982478) internal successors, (32902), 11415 states have internal predecessors, (32902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11416 states to 11416 states and 32902 transitions. [2021-08-21 11:59:06,338 INFO L78 Accepts]: Start accepts. Automaton has 11416 states and 32902 transitions. Word has length 32 [2021-08-21 11:59:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:06,338 INFO L470 AbstractCegarLoop]: Abstraction has 11416 states and 32902 transitions. [2021-08-21 11:59:06,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 11416 states and 32902 transitions. [2021-08-21 11:59:06,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:59:06,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:06,344 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:06,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 11:59:06,544 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 [2021-08-21 11:59:06,545 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:06,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1556724101, now seen corresponding path program 48 times [2021-08-21 11:59:06,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:06,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149795719] [2021-08-21 11:59:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:06,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:06,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:06,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149795719] [2021-08-21 11:59:06,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149795719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:06,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997919359] [2021-08-21 11:59:06,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:06,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:06,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:06,660 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) [2021-08-21 11:59:06,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 11:59:07,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 11:59:07,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:07,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:59:07,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:07,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997919359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:07,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:07,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 11:59:07,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360819677] [2021-08-21 11:59:07,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:59:07,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:07,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:59:07,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:07,917 INFO L87 Difference]: Start difference. First operand 11416 states and 32902 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-08-21 11:59:08,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:08,143 INFO L93 Difference]: Finished difference Result 17939 states and 50452 transitions. [2021-08-21 11:59:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:08,143 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 32 [2021-08-21 11:59:08,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:08,184 INFO L225 Difference]: With dead ends: 17939 [2021-08-21 11:59:08,184 INFO L226 Difference]: Without dead ends: 17907 [2021-08-21 11:59:08,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:59:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17907 states. [2021-08-21 11:59:08,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17907 to 14989. [2021-08-21 11:59:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14989 states, 14988 states have (on average 2.9194689084601015) internal successors, (43757), 14988 states have internal predecessors, (43757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14989 states to 14989 states and 43757 transitions. [2021-08-21 11:59:08,568 INFO L78 Accepts]: Start accepts. Automaton has 14989 states and 43757 transitions. Word has length 32 [2021-08-21 11:59:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:08,568 INFO L470 AbstractCegarLoop]: Abstraction has 14989 states and 43757 transitions. [2021-08-21 11:59:08,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-08-21 11:59:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 14989 states and 43757 transitions. [2021-08-21 11:59:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:59:08,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:08,574 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:08,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-21 11:59:08,776 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 [2021-08-21 11:59:08,777 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:08,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:08,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2116362785, now seen corresponding path program 49 times [2021-08-21 11:59:08,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:08,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264346657] [2021-08-21 11:59:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:08,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:08,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:08,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264346657] [2021-08-21 11:59:08,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264346657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:08,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205541656] [2021-08-21 11:59:08,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:08,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:08,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:08,861 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) [2021-08-21 11:59:08,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 11:59:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:09,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:59:09,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:10,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205541656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:10,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:10,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 11:59:10,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793569257] [2021-08-21 11:59:10,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:59:10,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:10,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:59:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:10,116 INFO L87 Difference]: Start difference. First operand 14989 states and 43757 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-08-21 11:59:10,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:10,356 INFO L93 Difference]: Finished difference Result 18393 states and 51276 transitions. [2021-08-21 11:59:10,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:59:10,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 32 [2021-08-21 11:59:10,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:10,400 INFO L225 Difference]: With dead ends: 18393 [2021-08-21 11:59:10,400 INFO L226 Difference]: Without dead ends: 18390 [2021-08-21 11:59:10,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:10,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18390 states. [2021-08-21 11:59:10,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18390 to 14441. [2021-08-21 11:59:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14441 states, 14440 states have (on average 2.903531855955679) internal successors, (41927), 14440 states have internal predecessors, (41927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14441 states to 14441 states and 41927 transitions. [2021-08-21 11:59:10,792 INFO L78 Accepts]: Start accepts. Automaton has 14441 states and 41927 transitions. Word has length 32 [2021-08-21 11:59:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:10,792 INFO L470 AbstractCegarLoop]: Abstraction has 14441 states and 41927 transitions. [2021-08-21 11:59:10,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-08-21 11:59:10,792 INFO L276 IsEmpty]: Start isEmpty. Operand 14441 states and 41927 transitions. [2021-08-21 11:59:10,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:59:10,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:10,798 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:10,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:10,998 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 [2021-08-21 11:59:10,999 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:10,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:10,999 INFO L82 PathProgramCache]: Analyzing trace with hash 478790329, now seen corresponding path program 50 times [2021-08-21 11:59:10,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:10,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228870699] [2021-08-21 11:59:10,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:10,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:11,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:11,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228870699] [2021-08-21 11:59:11,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228870699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:11,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235279182] [2021-08-21 11:59:11,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:11,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:11,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:11,096 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) [2021-08-21 11:59:11,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 11:59:12,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:12,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:12,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:59:12,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:12,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235279182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:12,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:12,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 11:59:12,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862052476] [2021-08-21 11:59:12,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:59:12,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:12,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:59:12,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:12,428 INFO L87 Difference]: Start difference. First operand 14441 states and 41927 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) [2021-08-21 11:59:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:12,706 INFO L93 Difference]: Finished difference Result 17852 states and 49436 transitions. [2021-08-21 11:59:12,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:59:12,707 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 32 [2021-08-21 11:59:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:12,748 INFO L225 Difference]: With dead ends: 17852 [2021-08-21 11:59:12,749 INFO L226 Difference]: Without dead ends: 17849 [2021-08-21 11:59:12,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:59:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17849 states. [2021-08-21 11:59:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17849 to 14322. [2021-08-21 11:59:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14322 states, 14321 states have (on average 2.8967949165561064) internal successors, (41485), 14321 states have internal predecessors, (41485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14322 states to 14322 states and 41485 transitions. [2021-08-21 11:59:13,071 INFO L78 Accepts]: Start accepts. Automaton has 14322 states and 41485 transitions. Word has length 32 [2021-08-21 11:59:13,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:13,071 INFO L470 AbstractCegarLoop]: Abstraction has 14322 states and 41485 transitions. [2021-08-21 11:59:13,072 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) [2021-08-21 11:59:13,072 INFO L276 IsEmpty]: Start isEmpty. Operand 14322 states and 41485 transitions. [2021-08-21 11:59:13,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:59:13,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:13,078 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:13,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-21 11:59:13,278 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 [2021-08-21 11:59:13,278 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:13,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:13,278 INFO L82 PathProgramCache]: Analyzing trace with hash 824683293, now seen corresponding path program 51 times [2021-08-21 11:59:13,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:13,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599278859] [2021-08-21 11:59:13,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:13,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:13,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:13,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599278859] [2021-08-21 11:59:13,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599278859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:13,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641090976] [2021-08-21 11:59:13,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:13,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:13,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:13,383 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) [2021-08-21 11:59:13,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 11:59:14,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:59:14,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:14,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:59:14,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-21 11:59:15,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641090976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:15,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:15,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-08-21 11:59:15,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257050233] [2021-08-21 11:59:15,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:59:15,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:15,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:59:15,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:59:15,105 INFO L87 Difference]: Start difference. First operand 14322 states and 41485 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-08-21 11:59:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:16,137 INFO L93 Difference]: Finished difference Result 23585 states and 66749 transitions. [2021-08-21 11:59:16,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 11:59:16,138 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 32 [2021-08-21 11:59:16,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:16,196 INFO L225 Difference]: With dead ends: 23585 [2021-08-21 11:59:16,197 INFO L226 Difference]: Without dead ends: 23531 [2021-08-21 11:59:16,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 771.5ms TimeCoverageRelationStatistics Valid=543, Invalid=1907, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 11:59:16,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23531 states. [2021-08-21 11:59:16,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23531 to 15895. [2021-08-21 11:59:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15895 states, 15894 states have (on average 2.8903359758399394) internal successors, (45939), 15894 states have internal predecessors, (45939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15895 states to 15895 states and 45939 transitions. [2021-08-21 11:59:16,696 INFO L78 Accepts]: Start accepts. Automaton has 15895 states and 45939 transitions. Word has length 32 [2021-08-21 11:59:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:16,696 INFO L470 AbstractCegarLoop]: Abstraction has 15895 states and 45939 transitions. [2021-08-21 11:59:16,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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) [2021-08-21 11:59:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 15895 states and 45939 transitions. [2021-08-21 11:59:16,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:16,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:16,705 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:16,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:16,905 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 [2021-08-21 11:59:16,906 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:16,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:16,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1854825621, now seen corresponding path program 9 times [2021-08-21 11:59:16,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:16,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362286160] [2021-08-21 11:59:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:16,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:17,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:17,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362286160] [2021-08-21 11:59:17,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362286160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:17,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810741777] [2021-08-21 11:59:17,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:17,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:17,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:17,013 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) [2021-08-21 11:59:17,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 11:59:18,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 11:59:18,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:18,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 11:59:18,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:18,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810741777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:18,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:18,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 11:59:18,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146009220] [2021-08-21 11:59:18,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:59:18,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:18,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:59:18,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:18,331 INFO L87 Difference]: Start difference. First operand 15895 states and 45939 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) [2021-08-21 11:59:18,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:18,699 INFO L93 Difference]: Finished difference Result 16589 states and 47370 transitions. [2021-08-21 11:59:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:59:18,699 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 [2021-08-21 11:59:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:18,737 INFO L225 Difference]: With dead ends: 16589 [2021-08-21 11:59:18,737 INFO L226 Difference]: Without dead ends: 16552 [2021-08-21 11:59:18,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:59:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16552 states. [2021-08-21 11:59:19,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16552 to 15790. [2021-08-21 11:59:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15790 states, 15789 states have (on average 2.8915700804357463) internal successors, (45655), 15789 states have internal predecessors, (45655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:19,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15790 states to 15790 states and 45655 transitions. [2021-08-21 11:59:19,101 INFO L78 Accepts]: Start accepts. Automaton has 15790 states and 45655 transitions. Word has length 35 [2021-08-21 11:59:19,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:19,101 INFO L470 AbstractCegarLoop]: Abstraction has 15790 states and 45655 transitions. [2021-08-21 11:59:19,101 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) [2021-08-21 11:59:19,101 INFO L276 IsEmpty]: Start isEmpty. Operand 15790 states and 45655 transitions. [2021-08-21 11:59:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:19,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:19,109 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:19,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-21 11:59:19,312 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 [2021-08-21 11:59:19,313 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:19,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:19,313 INFO L82 PathProgramCache]: Analyzing trace with hash -972961707, now seen corresponding path program 14 times [2021-08-21 11:59:19,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:19,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252410931] [2021-08-21 11:59:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:19,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:19,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:19,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252410931] [2021-08-21 11:59:19,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252410931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:19,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274425139] [2021-08-21 11:59:19,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:19,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:19,449 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) [2021-08-21 11:59:19,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 11:59:20,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:20,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:20,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 11:59:20,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:21,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274425139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:21,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:21,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 11:59:21,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796645444] [2021-08-21 11:59:21,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 11:59:21,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:21,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 11:59:21,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:21,063 INFO L87 Difference]: Start difference. First operand 15790 states and 45655 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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) [2021-08-21 11:59:21,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:21,574 INFO L93 Difference]: Finished difference Result 15768 states and 45494 transitions. [2021-08-21 11:59:21,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:21,574 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 35 [2021-08-21 11:59:21,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:21,611 INFO L225 Difference]: With dead ends: 15768 [2021-08-21 11:59:21,611 INFO L226 Difference]: Without dead ends: 15665 [2021-08-21 11:59:21,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:21,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15665 states. [2021-08-21 11:59:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15665 to 15626. [2021-08-21 11:59:21,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15626 states, 15625 states have (on average 2.893952) internal successors, (45218), 15625 states have internal predecessors, (45218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:21,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15626 states to 15626 states and 45218 transitions. [2021-08-21 11:59:21,923 INFO L78 Accepts]: Start accepts. Automaton has 15626 states and 45218 transitions. Word has length 35 [2021-08-21 11:59:21,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:21,924 INFO L470 AbstractCegarLoop]: Abstraction has 15626 states and 45218 transitions. [2021-08-21 11:59:21,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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) [2021-08-21 11:59:21,924 INFO L276 IsEmpty]: Start isEmpty. Operand 15626 states and 45218 transitions. [2021-08-21 11:59:21,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:21,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:21,932 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:21,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 11:59:22,132 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 [2021-08-21 11:59:22,133 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:22,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:22,133 INFO L82 PathProgramCache]: Analyzing trace with hash -800888287, now seen corresponding path program 15 times [2021-08-21 11:59:22,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:22,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030048457] [2021-08-21 11:59:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:22,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:22,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:22,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030048457] [2021-08-21 11:59:22,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030048457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:22,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521132874] [2021-08-21 11:59:22,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:22,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:22,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:22,232 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) [2021-08-21 11:59:22,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 11:59:23,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 11:59:23,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:23,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 11:59:23,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:23,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521132874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:23,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:23,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 11:59:23,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393428282] [2021-08-21 11:59:23,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:23,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:23,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:23,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:23,608 INFO L87 Difference]: Start difference. First operand 15626 states and 45218 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) [2021-08-21 11:59:23,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:23,853 INFO L93 Difference]: Finished difference Result 15851 states and 45656 transitions. [2021-08-21 11:59:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:23,854 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 [2021-08-21 11:59:23,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:23,893 INFO L225 Difference]: With dead ends: 15851 [2021-08-21 11:59:23,893 INFO L226 Difference]: Without dead ends: 15851 [2021-08-21 11:59:23,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:23,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15851 states. [2021-08-21 11:59:24,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15851 to 15626. [2021-08-21 11:59:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15626 states, 15625 states have (on average 2.893952) internal successors, (45218), 15625 states have internal predecessors, (45218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:24,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15626 states to 15626 states and 45218 transitions. [2021-08-21 11:59:24,187 INFO L78 Accepts]: Start accepts. Automaton has 15626 states and 45218 transitions. Word has length 35 [2021-08-21 11:59:24,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:24,187 INFO L470 AbstractCegarLoop]: Abstraction has 15626 states and 45218 transitions. [2021-08-21 11:59:24,187 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) [2021-08-21 11:59:24,187 INFO L276 IsEmpty]: Start isEmpty. Operand 15626 states and 45218 transitions. [2021-08-21 11:59:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:24,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:24,195 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:24,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:24,395 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 [2021-08-21 11:59:24,396 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:24,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:24,396 INFO L82 PathProgramCache]: Analyzing trace with hash 649055720, now seen corresponding path program 10 times [2021-08-21 11:59:24,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:24,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546069409] [2021-08-21 11:59:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:24,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:24,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:24,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546069409] [2021-08-21 11:59:24,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546069409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:24,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275351400] [2021-08-21 11:59:24,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:24,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:24,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:24,504 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) [2021-08-21 11:59:24,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 11:59:25,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:25,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:25,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:59:25,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:25,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275351400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:25,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:25,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-08-21 11:59:25,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813565575] [2021-08-21 11:59:25,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:59:25,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:25,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:59:25,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:25,976 INFO L87 Difference]: Start difference. First operand 15626 states and 45218 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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) [2021-08-21 11:59:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:26,299 INFO L93 Difference]: Finished difference Result 17379 states and 49089 transitions. [2021-08-21 11:59:26,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:59:26,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 35 [2021-08-21 11:59:26,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:26,347 INFO L225 Difference]: With dead ends: 17379 [2021-08-21 11:59:26,347 INFO L226 Difference]: Without dead ends: 17355 [2021-08-21 11:59:26,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:59:26,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17355 states. [2021-08-21 11:59:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17355 to 15662. [2021-08-21 11:59:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15662 states, 15661 states have (on average 2.8912585403230957) internal successors, (45280), 15661 states have internal predecessors, (45280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15662 states to 15662 states and 45280 transitions. [2021-08-21 11:59:26,733 INFO L78 Accepts]: Start accepts. Automaton has 15662 states and 45280 transitions. Word has length 35 [2021-08-21 11:59:26,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:26,734 INFO L470 AbstractCegarLoop]: Abstraction has 15662 states and 45280 transitions. [2021-08-21 11:59:26,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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) [2021-08-21 11:59:26,734 INFO L276 IsEmpty]: Start isEmpty. Operand 15662 states and 45280 transitions. [2021-08-21 11:59:26,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:26,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:26,741 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:26,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:26,942 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 [2021-08-21 11:59:26,942 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:26,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:26,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1763440021, now seen corresponding path program 16 times [2021-08-21 11:59:26,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:26,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448007951] [2021-08-21 11:59:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:26,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:27,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:27,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448007951] [2021-08-21 11:59:27,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448007951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:27,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045705630] [2021-08-21 11:59:27,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:27,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:27,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:27,054 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) [2021-08-21 11:59:27,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 11:59:28,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:28,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:28,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 11:59:28,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:28,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045705630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:28,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:28,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:59:28,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196992514] [2021-08-21 11:59:28,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:28,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:28,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:28,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:28,449 INFO L87 Difference]: Start difference. First operand 15662 states and 45280 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) [2021-08-21 11:59:28,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:28,756 INFO L93 Difference]: Finished difference Result 16081 states and 46080 transitions. [2021-08-21 11:59:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:28,756 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 [2021-08-21 11:59:28,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:28,792 INFO L225 Difference]: With dead ends: 16081 [2021-08-21 11:59:28,793 INFO L226 Difference]: Without dead ends: 15938 [2021-08-21 11:59:28,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15938 states. [2021-08-21 11:59:29,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15938 to 15645. [2021-08-21 11:59:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15645 states, 15644 states have (on average 2.879506520071593) internal successors, (45047), 15644 states have internal predecessors, (45047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15645 states to 15645 states and 45047 transitions. [2021-08-21 11:59:29,161 INFO L78 Accepts]: Start accepts. Automaton has 15645 states and 45047 transitions. Word has length 35 [2021-08-21 11:59:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:29,161 INFO L470 AbstractCegarLoop]: Abstraction has 15645 states and 45047 transitions. [2021-08-21 11:59:29,161 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) [2021-08-21 11:59:29,162 INFO L276 IsEmpty]: Start isEmpty. Operand 15645 states and 45047 transitions. [2021-08-21 11:59:29,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:29,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:29,169 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:29,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-21 11:59:29,369 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 [2021-08-21 11:59:29,370 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:29,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:29,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1149903841, now seen corresponding path program 17 times [2021-08-21 11:59:29,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:29,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317794610] [2021-08-21 11:59:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:29,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 11:59:29,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:29,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317794610] [2021-08-21 11:59:29,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317794610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:29,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933033473] [2021-08-21 11:59:29,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:29,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:29,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:29,474 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) [2021-08-21 11:59:29,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 11:59:30,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 11:59:30,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:30,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 11:59:30,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 11:59:30,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933033473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:30,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:30,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 11:59:30,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951566329] [2021-08-21 11:59:30,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:30,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:30,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:30,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:30,926 INFO L87 Difference]: Start difference. First operand 15645 states and 45047 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) [2021-08-21 11:59:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:31,194 INFO L93 Difference]: Finished difference Result 16454 states and 46829 transitions. [2021-08-21 11:59:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:31,195 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 [2021-08-21 11:59:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:31,235 INFO L225 Difference]: With dead ends: 16454 [2021-08-21 11:59:31,235 INFO L226 Difference]: Without dead ends: 16442 [2021-08-21 11:59:31,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16442 states. [2021-08-21 11:59:31,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16442 to 15912. [2021-08-21 11:59:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15912 states, 15911 states have (on average 2.8726667085664004) internal successors, (45707), 15911 states have internal predecessors, (45707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15912 states to 15912 states and 45707 transitions. [2021-08-21 11:59:31,623 INFO L78 Accepts]: Start accepts. Automaton has 15912 states and 45707 transitions. Word has length 35 [2021-08-21 11:59:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:31,623 INFO L470 AbstractCegarLoop]: Abstraction has 15912 states and 45707 transitions. [2021-08-21 11:59:31,623 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) [2021-08-21 11:59:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 15912 states and 45707 transitions. [2021-08-21 11:59:31,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:31,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:31,631 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:31,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 11:59:31,831 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 [2021-08-21 11:59:31,831 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:31,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:31,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1003146121, now seen corresponding path program 18 times [2021-08-21 11:59:31,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:31,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183429072] [2021-08-21 11:59:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:31,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:31,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:31,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183429072] [2021-08-21 11:59:31,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183429072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:31,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724454063] [2021-08-21 11:59:31,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:31,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:31,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:31,924 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) [2021-08-21 11:59:31,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 11:59:33,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 11:59:33,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:33,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 11:59:33,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:33,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724454063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:33,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:33,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 11:59:33,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744677758] [2021-08-21 11:59:33,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:59:33,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:59:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:33,366 INFO L87 Difference]: Start difference. First operand 15912 states and 45707 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) [2021-08-21 11:59:33,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:33,670 INFO L93 Difference]: Finished difference Result 16908 states and 47747 transitions. [2021-08-21 11:59:33,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:59:33,670 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 [2021-08-21 11:59:33,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:33,711 INFO L225 Difference]: With dead ends: 16908 [2021-08-21 11:59:33,711 INFO L226 Difference]: Without dead ends: 16896 [2021-08-21 11:59:33,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:59:33,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16896 states. [2021-08-21 11:59:33,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16896 to 15621. [2021-08-21 11:59:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15621 states, 15620 states have (on average 2.870998719590269) internal successors, (44845), 15620 states have internal predecessors, (44845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15621 states to 15621 states and 44845 transitions. [2021-08-21 11:59:34,167 INFO L78 Accepts]: Start accepts. Automaton has 15621 states and 44845 transitions. Word has length 35 [2021-08-21 11:59:34,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:34,168 INFO L470 AbstractCegarLoop]: Abstraction has 15621 states and 44845 transitions. [2021-08-21 11:59:34,168 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) [2021-08-21 11:59:34,168 INFO L276 IsEmpty]: Start isEmpty. Operand 15621 states and 44845 transitions. [2021-08-21 11:59:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:34,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:34,175 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:34,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 11:59:34,375 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 [2021-08-21 11:59:34,376 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:34,376 INFO L82 PathProgramCache]: Analyzing trace with hash 529412988, now seen corresponding path program 19 times [2021-08-21 11:59:34,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:34,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719306597] [2021-08-21 11:59:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:34,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:34,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:34,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719306597] [2021-08-21 11:59:34,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719306597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:34,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953772301] [2021-08-21 11:59:34,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:34,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:34,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:34,494 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) [2021-08-21 11:59:34,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 11:59:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:35,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:59:35,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:36,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953772301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:36,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:36,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 11:59:36,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408088655] [2021-08-21 11:59:36,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:59:36,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:36,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:59:36,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:36,020 INFO L87 Difference]: Start difference. First operand 15621 states and 44845 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) [2021-08-21 11:59:36,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:36,221 INFO L93 Difference]: Finished difference Result 15905 states and 45325 transitions. [2021-08-21 11:59:36,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:36,221 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 35 [2021-08-21 11:59:36,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:36,258 INFO L225 Difference]: With dead ends: 15905 [2021-08-21 11:59:36,258 INFO L226 Difference]: Without dead ends: 15884 [2021-08-21 11:59:36,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:36,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15884 states. [2021-08-21 11:59:36,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15884 to 14989. [2021-08-21 11:59:36,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14989 states, 14988 states have (on average 2.8778356018147853) internal successors, (43133), 14988 states have internal predecessors, (43133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:36,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14989 states to 14989 states and 43133 transitions. [2021-08-21 11:59:36,548 INFO L78 Accepts]: Start accepts. Automaton has 14989 states and 43133 transitions. Word has length 35 [2021-08-21 11:59:36,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:36,548 INFO L470 AbstractCegarLoop]: Abstraction has 14989 states and 43133 transitions. [2021-08-21 11:59:36,548 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) [2021-08-21 11:59:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand 14989 states and 43133 transitions. [2021-08-21 11:59:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:36,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:36,555 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:36,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:36,755 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 [2021-08-21 11:59:36,756 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:36,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:36,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1764899259, now seen corresponding path program 11 times [2021-08-21 11:59:36,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:36,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277191164] [2021-08-21 11:59:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:36,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:36,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:36,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277191164] [2021-08-21 11:59:36,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277191164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:36,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325862630] [2021-08-21 11:59:36,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:36,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:36,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:36,856 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) [2021-08-21 11:59:36,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 11:59:38,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 11:59:38,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:38,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 11:59:38,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:38,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325862630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:38,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:38,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 11:59:38,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535015999] [2021-08-21 11:59:38,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:38,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:38,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:38,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:38,478 INFO L87 Difference]: Start difference. First operand 14989 states and 43133 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) [2021-08-21 11:59:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:38,722 INFO L93 Difference]: Finished difference Result 15938 states and 45064 transitions. [2021-08-21 11:59:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:38,723 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 [2021-08-21 11:59:38,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:38,763 INFO L225 Difference]: With dead ends: 15938 [2021-08-21 11:59:38,763 INFO L226 Difference]: Without dead ends: 15922 [2021-08-21 11:59:38,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:38,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15922 states. [2021-08-21 11:59:39,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15922 to 15255. [2021-08-21 11:59:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15255 states, 15254 states have (on average 2.864887898256195) internal successors, (43701), 15254 states have internal predecessors, (43701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15255 states to 15255 states and 43701 transitions. [2021-08-21 11:59:39,079 INFO L78 Accepts]: Start accepts. Automaton has 15255 states and 43701 transitions. Word has length 35 [2021-08-21 11:59:39,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:39,079 INFO L470 AbstractCegarLoop]: Abstraction has 15255 states and 43701 transitions. [2021-08-21 11:59:39,079 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) [2021-08-21 11:59:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 15255 states and 43701 transitions. [2021-08-21 11:59:39,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:39,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:39,086 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:39,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-21 11:59:39,286 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 [2021-08-21 11:59:39,287 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:39,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:39,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1029735045, now seen corresponding path program 20 times [2021-08-21 11:59:39,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:39,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129671237] [2021-08-21 11:59:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:39,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:39,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:39,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129671237] [2021-08-21 11:59:39,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129671237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:39,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823812914] [2021-08-21 11:59:39,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:39,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:39,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:39,382 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) [2021-08-21 11:59:39,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 11:59:40,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:40,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:40,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 11:59:40,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:41,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823812914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:41,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:41,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 11:59:41,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119828935] [2021-08-21 11:59:41,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:59:41,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:41,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:59:41,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:59:41,027 INFO L87 Difference]: Start difference. First operand 15255 states and 43701 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) [2021-08-21 11:59:41,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:41,341 INFO L93 Difference]: Finished difference Result 14661 states and 41414 transitions. [2021-08-21 11:59:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:41,341 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 [2021-08-21 11:59:41,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:41,385 INFO L225 Difference]: With dead ends: 14661 [2021-08-21 11:59:41,386 INFO L226 Difference]: Without dead ends: 14432 [2021-08-21 11:59:41,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:41,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14432 states. [2021-08-21 11:59:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14432 to 14073. [2021-08-21 11:59:41,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14073 states, 14072 states have (on average 2.8222001137009665) internal successors, (39714), 14072 states have internal predecessors, (39714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:41,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14073 states to 14073 states and 39714 transitions. [2021-08-21 11:59:41,669 INFO L78 Accepts]: Start accepts. Automaton has 14073 states and 39714 transitions. Word has length 35 [2021-08-21 11:59:41,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:41,669 INFO L470 AbstractCegarLoop]: Abstraction has 14073 states and 39714 transitions. [2021-08-21 11:59:41,669 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) [2021-08-21 11:59:41,669 INFO L276 IsEmpty]: Start isEmpty. Operand 14073 states and 39714 transitions. [2021-08-21 11:59:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:41,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:41,676 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:41,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-21 11:59:41,876 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 [2021-08-21 11:59:41,877 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1003338568, now seen corresponding path program 21 times [2021-08-21 11:59:41,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:41,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853849842] [2021-08-21 11:59:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:41,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:41,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:41,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853849842] [2021-08-21 11:59:41,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853849842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:41,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819949488] [2021-08-21 11:59:41,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:41,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:41,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:41,986 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) [2021-08-21 11:59:41,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 11:59:43,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:59:43,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:43,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:59:43,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 11:59:43,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819949488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:43,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:43,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 11:59:43,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246954646] [2021-08-21 11:59:43,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 11:59:43,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:43,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 11:59:43,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:59:43,627 INFO L87 Difference]: Start difference. First operand 14073 states and 39714 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) [2021-08-21 11:59:43,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:43,801 INFO L93 Difference]: Finished difference Result 14656 states and 40757 transitions. [2021-08-21 11:59:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:43,801 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 35 [2021-08-21 11:59:43,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:43,836 INFO L225 Difference]: With dead ends: 14656 [2021-08-21 11:59:43,836 INFO L226 Difference]: Without dead ends: 14635 [2021-08-21 11:59:43,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:59:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14635 states. [2021-08-21 11:59:44,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14635 to 14044. [2021-08-21 11:59:44,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14044 states, 14043 states have (on average 2.814854375845617) internal successors, (39529), 14043 states have internal predecessors, (39529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:44,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14044 states to 14044 states and 39529 transitions. [2021-08-21 11:59:44,099 INFO L78 Accepts]: Start accepts. Automaton has 14044 states and 39529 transitions. Word has length 35 [2021-08-21 11:59:44,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:44,099 INFO L470 AbstractCegarLoop]: Abstraction has 14044 states and 39529 transitions. [2021-08-21 11:59:44,099 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) [2021-08-21 11:59:44,099 INFO L276 IsEmpty]: Start isEmpty. Operand 14044 states and 39529 transitions. [2021-08-21 11:59:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:44,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:44,106 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:44,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:44,306 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 [2021-08-21 11:59:44,307 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:44,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:44,307 INFO L82 PathProgramCache]: Analyzing trace with hash 2031205218, now seen corresponding path program 22 times [2021-08-21 11:59:44,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:44,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251333557] [2021-08-21 11:59:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:44,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:44,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:44,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251333557] [2021-08-21 11:59:44,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251333557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:44,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389275475] [2021-08-21 11:59:44,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:59:44,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:44,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:44,405 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) [2021-08-21 11:59:44,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 11:59:45,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:59:45,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:45,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:59:45,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:45,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389275475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:45,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:45,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 11:59:45,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185936077] [2021-08-21 11:59:45,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:59:45,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:45,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:59:45,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:45,993 INFO L87 Difference]: Start difference. First operand 14044 states and 39529 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) [2021-08-21 11:59:46,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:46,218 INFO L93 Difference]: Finished difference Result 14636 states and 40588 transitions. [2021-08-21 11:59:46,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:59:46,219 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 35 [2021-08-21 11:59:46,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:46,252 INFO L225 Difference]: With dead ends: 14636 [2021-08-21 11:59:46,252 INFO L226 Difference]: Without dead ends: 14612 [2021-08-21 11:59:46,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 11:59:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14612 states. [2021-08-21 11:59:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14612 to 13135. [2021-08-21 11:59:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 2.8171920207096086) internal successors, (37001), 13134 states have internal predecessors, (37001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 37001 transitions. [2021-08-21 11:59:46,594 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 37001 transitions. Word has length 35 [2021-08-21 11:59:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:46,594 INFO L470 AbstractCegarLoop]: Abstraction has 13135 states and 37001 transitions. [2021-08-21 11:59:46,594 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) [2021-08-21 11:59:46,594 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 37001 transitions. [2021-08-21 11:59:46,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:46,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:46,600 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:46,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 11:59:46,801 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 [2021-08-21 11:59:46,801 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:46,801 INFO L82 PathProgramCache]: Analyzing trace with hash 653482643, now seen corresponding path program 23 times [2021-08-21 11:59:46,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:46,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140580970] [2021-08-21 11:59:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:46,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:46,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:46,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140580970] [2021-08-21 11:59:46,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140580970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:46,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381863091] [2021-08-21 11:59:46,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:59:46,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:46,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:46,888 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) [2021-08-21 11:59:46,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 11:59:48,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 11:59:48,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:48,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 11:59:48,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:48,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381863091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:48,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:48,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 11:59:48,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277354619] [2021-08-21 11:59:48,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:59:48,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:48,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:59:48,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:48,431 INFO L87 Difference]: Start difference. First operand 13135 states and 37001 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) [2021-08-21 11:59:48,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:48,740 INFO L93 Difference]: Finished difference Result 13567 states and 37130 transitions. [2021-08-21 11:59:48,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:59:48,740 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 [2021-08-21 11:59:48,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:48,768 INFO L225 Difference]: With dead ends: 13567 [2021-08-21 11:59:48,769 INFO L226 Difference]: Without dead ends: 13501 [2021-08-21 11:59:48,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:59:48,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13501 states. [2021-08-21 11:59:48,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13501 to 10385. [2021-08-21 11:59:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10385 states, 10384 states have (on average 2.815870570107858) internal successors, (29240), 10384 states have internal predecessors, (29240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:49,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10385 states to 10385 states and 29240 transitions. [2021-08-21 11:59:49,004 INFO L78 Accepts]: Start accepts. Automaton has 10385 states and 29240 transitions. Word has length 35 [2021-08-21 11:59:49,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:49,004 INFO L470 AbstractCegarLoop]: Abstraction has 10385 states and 29240 transitions. [2021-08-21 11:59:49,004 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) [2021-08-21 11:59:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 10385 states and 29240 transitions. [2021-08-21 11:59:49,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:49,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:49,009 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:49,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:49,210 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 [2021-08-21 11:59:49,210 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:49,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:49,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1040085320, now seen corresponding path program 24 times [2021-08-21 11:59:49,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:49,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641663163] [2021-08-21 11:59:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:49,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:49,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:49,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641663163] [2021-08-21 11:59:49,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641663163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:49,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664316557] [2021-08-21 11:59:49,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:49,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:49,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:49,326 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) [2021-08-21 11:59:49,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 11:59:50,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:59:50,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:50,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:59:50,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 11:59:51,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664316557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:51,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:51,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 11:59:51,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700375291] [2021-08-21 11:59:51,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:59:51,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:51,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:59:51,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:59:51,021 INFO L87 Difference]: Start difference. First operand 10385 states and 29240 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) [2021-08-21 11:59:51,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:51,243 INFO L93 Difference]: Finished difference Result 10777 states and 29915 transitions. [2021-08-21 11:59:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:59:51,243 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 35 [2021-08-21 11:59:51,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:51,266 INFO L225 Difference]: With dead ends: 10777 [2021-08-21 11:59:51,266 INFO L226 Difference]: Without dead ends: 10750 [2021-08-21 11:59:51,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:59:51,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2021-08-21 11:59:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 10406. [2021-08-21 11:59:51,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10406 states, 10405 states have (on average 2.8100913022585297) internal successors, (29239), 10405 states have internal predecessors, (29239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:51,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10406 states to 10406 states and 29239 transitions. [2021-08-21 11:59:51,447 INFO L78 Accepts]: Start accepts. Automaton has 10406 states and 29239 transitions. Word has length 35 [2021-08-21 11:59:51,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:51,447 INFO L470 AbstractCegarLoop]: Abstraction has 10406 states and 29239 transitions. [2021-08-21 11:59:51,447 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) [2021-08-21 11:59:51,447 INFO L276 IsEmpty]: Start isEmpty. Operand 10406 states and 29239 transitions. [2021-08-21 11:59:51,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:51,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:51,452 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:51,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 11:59:51,653 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 [2021-08-21 11:59:51,653 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:51,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2009131819, now seen corresponding path program 12 times [2021-08-21 11:59:51,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:51,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823347981] [2021-08-21 11:59:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:51,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:51,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:51,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823347981] [2021-08-21 11:59:51,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823347981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:51,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072448689] [2021-08-21 11:59:51,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:59:51,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:51,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:51,759 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) [2021-08-21 11:59:51,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 11:59:53,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 11:59:53,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:53,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 11:59:53,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:53,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072448689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:53,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:53,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 11:59:53,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224507988] [2021-08-21 11:59:53,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:59:53,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:53,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:59:53,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:53,351 INFO L87 Difference]: Start difference. First operand 10406 states and 29239 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) [2021-08-21 11:59:53,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:53,655 INFO L93 Difference]: Finished difference Result 11098 states and 30591 transitions. [2021-08-21 11:59:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:59:53,655 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 [2021-08-21 11:59:53,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:53,677 INFO L225 Difference]: With dead ends: 11098 [2021-08-21 11:59:53,677 INFO L226 Difference]: Without dead ends: 11080 [2021-08-21 11:59:53,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:59:53,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11080 states. [2021-08-21 11:59:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11080 to 9804. [2021-08-21 11:59:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9804 states, 9803 states have (on average 2.826685708456595) internal successors, (27710), 9803 states have internal predecessors, (27710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:53,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9804 states to 9804 states and 27710 transitions. [2021-08-21 11:59:53,844 INFO L78 Accepts]: Start accepts. Automaton has 9804 states and 27710 transitions. Word has length 35 [2021-08-21 11:59:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:53,844 INFO L470 AbstractCegarLoop]: Abstraction has 9804 states and 27710 transitions. [2021-08-21 11:59:53,844 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) [2021-08-21 11:59:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 9804 states and 27710 transitions. [2021-08-21 11:59:53,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:53,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:53,849 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:53,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 11:59:54,049 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 [2021-08-21 11:59:54,050 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash -2106314078, now seen corresponding path program 25 times [2021-08-21 11:59:54,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:54,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120749960] [2021-08-21 11:59:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:54,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-21 11:59:54,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:54,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120749960] [2021-08-21 11:59:54,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120749960] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:59:54,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:59:54,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 11:59:54,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080971236] [2021-08-21 11:59:54,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 11:59:54,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:54,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 11:59:54,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 11:59:54,065 INFO L87 Difference]: Start difference. First operand 9804 states and 27710 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:54,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:54,073 INFO L93 Difference]: Finished difference Result 2349 states and 5506 transitions. [2021-08-21 11:59:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 11:59:54,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-21 11:59:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:54,076 INFO L225 Difference]: With dead ends: 2349 [2021-08-21 11:59:54,077 INFO L226 Difference]: Without dead ends: 2331 [2021-08-21 11:59:54,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 11:59:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-08-21 11:59:54,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1380. [2021-08-21 11:59:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.3343002175489485) internal successors, (3219), 1379 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3219 transitions. [2021-08-21 11:59:54,094 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3219 transitions. Word has length 35 [2021-08-21 11:59:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:54,094 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 3219 transitions. [2021-08-21 11:59:54,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3219 transitions. [2021-08-21 11:59:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:54,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:54,096 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:54,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-08-21 11:59:54,097 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:54,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2108944533, now seen corresponding path program 26 times [2021-08-21 11:59:54,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:54,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509240844] [2021-08-21 11:59:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:54,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:54,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:54,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509240844] [2021-08-21 11:59:54,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509240844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:54,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037258134] [2021-08-21 11:59:54,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:59:54,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:54,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:54,212 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) [2021-08-21 11:59:54,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 11:59:55,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:59:55,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:55,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 11:59:55,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:55,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037258134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:55,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:55,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 11:59:55,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987476296] [2021-08-21 11:59:55,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:59:55,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:55,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:59:55,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:59:55,967 INFO L87 Difference]: Start difference. First operand 1380 states and 3219 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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) [2021-08-21 11:59:56,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:56,272 INFO L93 Difference]: Finished difference Result 1429 states and 3294 transitions. [2021-08-21 11:59:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:56,272 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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 35 [2021-08-21 11:59:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:56,274 INFO L225 Difference]: With dead ends: 1429 [2021-08-21 11:59:56,274 INFO L226 Difference]: Without dead ends: 1397 [2021-08-21 11:59:56,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:59:56,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-08-21 11:59:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1380. [2021-08-21 11:59:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.3299492385786804) internal successors, (3213), 1379 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3213 transitions. [2021-08-21 11:59:56,287 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3213 transitions. Word has length 35 [2021-08-21 11:59:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:56,288 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 3213 transitions. [2021-08-21 11:59:56,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 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) [2021-08-21 11:59:56,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3213 transitions. [2021-08-21 11:59:56,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:56,289 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:56,289 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:56,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-21 11:59:56,489 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,SelfDestructingSolverStorable97 [2021-08-21 11:59:56,490 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:56,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:56,490 INFO L82 PathProgramCache]: Analyzing trace with hash -249250038, now seen corresponding path program 27 times [2021-08-21 11:59:56,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:56,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697057491] [2021-08-21 11:59:56,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:56,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:59:56,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:56,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697057491] [2021-08-21 11:59:56,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697057491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:56,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064971746] [2021-08-21 11:59:56,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:59:56,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:56,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:56,593 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) [2021-08-21 11:59:56,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 11:59:58,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 11:59:58,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:59:58,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:59:58,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:59:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:58,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064971746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:58,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:59:58,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 11:59:58,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664435425] [2021-08-21 11:59:58,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 11:59:58,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:59:58,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 11:59:58,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:59:58,463 INFO L87 Difference]: Start difference. First operand 1380 states and 3213 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) [2021-08-21 11:59:58,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:59:58,617 INFO L93 Difference]: Finished difference Result 2071 states and 4706 transitions. [2021-08-21 11:59:58,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:59:58,617 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 35 [2021-08-21 11:59:58,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:59:58,620 INFO L225 Difference]: With dead ends: 2071 [2021-08-21 11:59:58,620 INFO L226 Difference]: Without dead ends: 2071 [2021-08-21 11:59:58,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:59:58,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-08-21 11:59:58,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1527. [2021-08-21 11:59:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.4023591087811274) internal successors, (3666), 1526 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:59:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 3666 transitions. [2021-08-21 11:59:58,639 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 3666 transitions. Word has length 35 [2021-08-21 11:59:58,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:59:58,639 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 3666 transitions. [2021-08-21 11:59:58,639 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) [2021-08-21 11:59:58,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 3666 transitions. [2021-08-21 11:59:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 11:59:58,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:59:58,640 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:59:58,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 11:59:58,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-08-21 11:59:58,841 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:59:58,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:59:58,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1020085705, now seen corresponding path program 13 times [2021-08-21 11:59:58,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:59:58,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536374448] [2021-08-21 11:59:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:59:58,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:59:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:59:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 11:59:58,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:59:58,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536374448] [2021-08-21 11:59:58,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536374448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:59:58,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265532367] [2021-08-21 11:59:58,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:59:58,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:59:58,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:59:58,939 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) [2021-08-21 11:59:58,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 12:00:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:00,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:00:00,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:00,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265532367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:00,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:00,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:00:00,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186844890] [2021-08-21 12:00:00,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:00:00,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:00,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:00:00,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:00:00,611 INFO L87 Difference]: Start difference. First operand 1527 states and 3666 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-08-21 12:00:00,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:00,819 INFO L93 Difference]: Finished difference Result 1909 states and 4411 transitions. [2021-08-21 12:00:00,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:00:00,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 [2021-08-21 12:00:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:00,822 INFO L225 Difference]: With dead ends: 1909 [2021-08-21 12:00:00,822 INFO L226 Difference]: Without dead ends: 1905 [2021-08-21 12:00:00,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:00:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2021-08-21 12:00:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1526. [2021-08-21 12:00:00,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.40327868852459) internal successors, (3665), 1525 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3665 transitions. [2021-08-21 12:00:00,840 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3665 transitions. Word has length 35 [2021-08-21 12:00:00,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:00,840 INFO L470 AbstractCegarLoop]: Abstraction has 1526 states and 3665 transitions. [2021-08-21 12:00:00,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-08-21 12:00:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3665 transitions. [2021-08-21 12:00:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:00:00,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:00,842 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:00,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:01,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:01,042 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:01,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:01,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1641585207, now seen corresponding path program 28 times [2021-08-21 12:00:01,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:01,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093608037] [2021-08-21 12:00:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:01,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:01,152 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:01,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:01,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093608037] [2021-08-21 12:00:01,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093608037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:01,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103743094] [2021-08-21 12:00:01,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:01,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:01,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:01,153 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) [2021-08-21 12:00:01,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 12:00:02,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:02,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:00:02,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:03,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103743094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:03,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:03,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 12:00:03,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168307171] [2021-08-21 12:00:03,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:00:03,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:03,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:00:03,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:03,123 INFO L87 Difference]: Start difference. First operand 1526 states and 3665 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) [2021-08-21 12:00:03,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:03,308 INFO L93 Difference]: Finished difference Result 1563 states and 3719 transitions. [2021-08-21 12:00:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:00:03,309 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 35 [2021-08-21 12:00:03,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:03,311 INFO L225 Difference]: With dead ends: 1563 [2021-08-21 12:00:03,311 INFO L226 Difference]: Without dead ends: 1543 [2021-08-21 12:00:03,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:03,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-08-21 12:00:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1526. [2021-08-21 12:00:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.401311475409836) internal successors, (3662), 1525 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3662 transitions. [2021-08-21 12:00:03,330 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3662 transitions. Word has length 35 [2021-08-21 12:00:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:03,330 INFO L470 AbstractCegarLoop]: Abstraction has 1526 states and 3662 transitions. [2021-08-21 12:00:03,331 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) [2021-08-21 12:00:03,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3662 transitions. [2021-08-21 12:00:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:00:03,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:03,333 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:03,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-21 12:00:03,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:03,533 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:03,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:03,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1220962274, now seen corresponding path program 29 times [2021-08-21 12:00:03,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:03,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857812133] [2021-08-21 12:00:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:03,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:03,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:03,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857812133] [2021-08-21 12:00:03,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857812133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:03,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287378399] [2021-08-21 12:00:03,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:03,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:03,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:03,621 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) [2021-08-21 12:00:03,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 12:00:05,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:00:05,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:05,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:05,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:05,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287378399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:05,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:05,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-08-21 12:00:05,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707061218] [2021-08-21 12:00:05,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:05,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:05,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:05,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:05,633 INFO L87 Difference]: Start difference. First operand 1526 states and 3662 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:05,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:05,780 INFO L93 Difference]: Finished difference Result 2415 states and 5508 transitions. [2021-08-21 12:00:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:00:05,781 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:00:05,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:05,784 INFO L225 Difference]: With dead ends: 2415 [2021-08-21 12:00:05,784 INFO L226 Difference]: Without dead ends: 2415 [2021-08-21 12:00:05,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-08-21 12:00:05,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1653. [2021-08-21 12:00:05,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.4473365617433416) internal successors, (4043), 1652 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:05,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 4043 transitions. [2021-08-21 12:00:05,808 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 4043 transitions. Word has length 35 [2021-08-21 12:00:05,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:05,808 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 4043 transitions. [2021-08-21 12:00:05,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:05,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 4043 transitions. [2021-08-21 12:00:05,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:00:05,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:05,810 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:05,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-21 12:00:06,010 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,SelfDestructingSolverStorable101 [2021-08-21 12:00:06,010 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:06,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:06,010 INFO L82 PathProgramCache]: Analyzing trace with hash 982900757, now seen corresponding path program 14 times [2021-08-21 12:00:06,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:06,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457490814] [2021-08-21 12:00:06,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:06,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:06,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:06,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457490814] [2021-08-21 12:00:06,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457490814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:06,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554928882] [2021-08-21 12:00:06,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:06,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:06,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:06,105 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) [2021-08-21 12:00:06,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 12:00:07,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:07,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:07,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:00:07,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:07,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554928882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:07,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:07,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:00:07,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639008111] [2021-08-21 12:00:07,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:00:07,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:07,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:00:07,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:00:07,981 INFO L87 Difference]: Start difference. First operand 1653 states and 4043 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-08-21 12:00:08,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:08,258 INFO L93 Difference]: Finished difference Result 2638 states and 6132 transitions. [2021-08-21 12:00:08,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:00:08,259 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 [2021-08-21 12:00:08,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:08,262 INFO L225 Difference]: With dead ends: 2638 [2021-08-21 12:00:08,262 INFO L226 Difference]: Without dead ends: 2596 [2021-08-21 12:00:08,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:08,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-08-21 12:00:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1819. [2021-08-21 12:00:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 2.4592959295929595) internal successors, (4471), 1818 states have internal predecessors, (4471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:08,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 4471 transitions. [2021-08-21 12:00:08,294 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 4471 transitions. Word has length 35 [2021-08-21 12:00:08,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:08,294 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 4471 transitions. [2021-08-21 12:00:08,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-08-21 12:00:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 4471 transitions. [2021-08-21 12:00:08,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:00:08,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:08,297 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:08,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 12:00:08,497 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,SelfDestructingSolverStorable102 [2021-08-21 12:00:08,497 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:08,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:08,497 INFO L82 PathProgramCache]: Analyzing trace with hash -570796100, now seen corresponding path program 30 times [2021-08-21 12:00:08,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:08,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953982775] [2021-08-21 12:00:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:08,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:08,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:08,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953982775] [2021-08-21 12:00:08,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953982775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:08,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874804219] [2021-08-21 12:00:08,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:08,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:08,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:08,587 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) [2021-08-21 12:00:08,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 12:00:10,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:00:10,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:10,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:10,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:10,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874804219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:10,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:10,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:00:10,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281309612] [2021-08-21 12:00:10,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:00:10,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:10,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:00:10,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:00:10,490 INFO L87 Difference]: Start difference. First operand 1819 states and 4471 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) [2021-08-21 12:00:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:10,594 INFO L93 Difference]: Finished difference Result 2417 states and 5580 transitions. [2021-08-21 12:00:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:00:10,595 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 35 [2021-08-21 12:00:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:10,598 INFO L225 Difference]: With dead ends: 2417 [2021-08-21 12:00:10,598 INFO L226 Difference]: Without dead ends: 2414 [2021-08-21 12:00:10,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:10,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-08-21 12:00:10,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1818. [2021-08-21 12:00:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.45789763346175) internal successors, (4466), 1817 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 4466 transitions. [2021-08-21 12:00:10,622 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 4466 transitions. Word has length 35 [2021-08-21 12:00:10,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:10,622 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 4466 transitions. [2021-08-21 12:00:10,622 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) [2021-08-21 12:00:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 4466 transitions. [2021-08-21 12:00:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:00:10,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:10,624 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:10,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-21 12:00:10,825 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,SelfDestructingSolverStorable103 [2021-08-21 12:00:10,825 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash -363733534, now seen corresponding path program 31 times [2021-08-21 12:00:10,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:10,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090779106] [2021-08-21 12:00:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:10,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:10,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:10,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090779106] [2021-08-21 12:00:10,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090779106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:10,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084039276] [2021-08-21 12:00:10,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:10,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:10,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:10,904 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) [2021-08-21 12:00:10,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 12:00:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:12,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:12,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:00:12,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084039276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:12,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:12,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:00:12,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891096435] [2021-08-21 12:00:12,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:00:12,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:12,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:00:12,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:00:12,804 INFO L87 Difference]: Start difference. First operand 1818 states and 4466 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) [2021-08-21 12:00:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:12,913 INFO L93 Difference]: Finished difference Result 2608 states and 6106 transitions. [2021-08-21 12:00:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:00:12,914 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 35 [2021-08-21 12:00:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:12,918 INFO L225 Difference]: With dead ends: 2608 [2021-08-21 12:00:12,918 INFO L226 Difference]: Without dead ends: 2596 [2021-08-21 12:00:12,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-08-21 12:00:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1953. [2021-08-21 12:00:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.4574795081967213) internal successors, (4797), 1952 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:12,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 4797 transitions. [2021-08-21 12:00:12,948 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 4797 transitions. Word has length 35 [2021-08-21 12:00:12,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:12,948 INFO L470 AbstractCegarLoop]: Abstraction has 1953 states and 4797 transitions. [2021-08-21 12:00:12,948 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) [2021-08-21 12:00:12,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 4797 transitions. [2021-08-21 12:00:12,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:00:12,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:12,950 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:12,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:13,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:13,151 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:13,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:13,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1811733547, now seen corresponding path program 32 times [2021-08-21 12:00:13,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:13,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364797264] [2021-08-21 12:00:13,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:13,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:13,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:13,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364797264] [2021-08-21 12:00:13,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364797264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:13,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699074100] [2021-08-21 12:00:13,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:13,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:13,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:13,244 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) [2021-08-21 12:00:13,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 12:00:14,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:14,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:00:14,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:15,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699074100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:15,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:15,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-21 12:00:15,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72198059] [2021-08-21 12:00:15,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:00:15,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:15,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:00:15,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:00:15,150 INFO L87 Difference]: Start difference. First operand 1953 states and 4797 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) [2021-08-21 12:00:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:15,392 INFO L93 Difference]: Finished difference Result 2377 states and 5580 transitions. [2021-08-21 12:00:15,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:00:15,393 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 [2021-08-21 12:00:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:15,396 INFO L225 Difference]: With dead ends: 2377 [2021-08-21 12:00:15,397 INFO L226 Difference]: Without dead ends: 2298 [2021-08-21 12:00:15,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-08-21 12:00:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2023. [2021-08-21 12:00:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 2.4416419386745796) internal successors, (4937), 2022 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 4937 transitions. [2021-08-21 12:00:15,424 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 4937 transitions. Word has length 35 [2021-08-21 12:00:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:15,424 INFO L470 AbstractCegarLoop]: Abstraction has 2023 states and 4937 transitions. [2021-08-21 12:00:15,424 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) [2021-08-21 12:00:15,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 4937 transitions. [2021-08-21 12:00:15,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:00:15,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:15,427 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:15,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:15,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:15,628 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:15,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:15,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1869697569, now seen corresponding path program 33 times [2021-08-21 12:00:15,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:15,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273882771] [2021-08-21 12:00:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:15,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:00:15,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:15,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273882771] [2021-08-21 12:00:15,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273882771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:15,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113682662] [2021-08-21 12:00:15,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:15,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:15,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:15,763 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) [2021-08-21 12:00:15,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 12:00:17,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:00:17,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:17,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:00:17,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:00:17,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113682662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:17,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:17,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 12:00:17,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102296958] [2021-08-21 12:00:17,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:00:17,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:17,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:00:17,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:00:17,647 INFO L87 Difference]: Start difference. First operand 2023 states and 4937 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) [2021-08-21 12:00:17,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:17,857 INFO L93 Difference]: Finished difference Result 2392 states and 5647 transitions. [2021-08-21 12:00:17,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:00:17,857 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 [2021-08-21 12:00:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:17,861 INFO L225 Difference]: With dead ends: 2392 [2021-08-21 12:00:17,861 INFO L226 Difference]: Without dead ends: 2380 [2021-08-21 12:00:17,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:17,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-08-21 12:00:17,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2025. [2021-08-21 12:00:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 2.441205533596838) internal successors, (4941), 2024 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:17,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 4941 transitions. [2021-08-21 12:00:17,888 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 4941 transitions. Word has length 35 [2021-08-21 12:00:17,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:17,888 INFO L470 AbstractCegarLoop]: Abstraction has 2025 states and 4941 transitions. [2021-08-21 12:00:17,888 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) [2021-08-21 12:00:17,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 4941 transitions. [2021-08-21 12:00:17,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:00:17,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:17,890 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:17,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 12:00:18,090 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,SelfDestructingSolverStorable106 [2021-08-21 12:00:18,091 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:18,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:18,091 INFO L82 PathProgramCache]: Analyzing trace with hash -283352393, now seen corresponding path program 34 times [2021-08-21 12:00:18,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:18,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582924161] [2021-08-21 12:00:18,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:18,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:18,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:18,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582924161] [2021-08-21 12:00:18,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582924161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:18,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700787525] [2021-08-21 12:00:18,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:18,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:18,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:18,169 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) [2021-08-21 12:00:18,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 12:00:19,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:19,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:19,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:00:19,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:20,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700787525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:20,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:20,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:00:20,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648975886] [2021-08-21 12:00:20,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:00:20,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:20,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:00:20,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:00:20,052 INFO L87 Difference]: Start difference. First operand 2025 states and 4941 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) [2021-08-21 12:00:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:20,331 INFO L93 Difference]: Finished difference Result 3056 states and 7043 transitions. [2021-08-21 12:00:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:00:20,331 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 [2021-08-21 12:00:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:20,335 INFO L225 Difference]: With dead ends: 3056 [2021-08-21 12:00:20,336 INFO L226 Difference]: Without dead ends: 3002 [2021-08-21 12:00:20,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:00:20,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-08-21 12:00:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2084. [2021-08-21 12:00:20,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.4459913586173787) internal successors, (5095), 2083 states have internal predecessors, (5095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 5095 transitions. [2021-08-21 12:00:20,365 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 5095 transitions. Word has length 35 [2021-08-21 12:00:20,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:20,365 INFO L470 AbstractCegarLoop]: Abstraction has 2084 states and 5095 transitions. [2021-08-21 12:00:20,365 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) [2021-08-21 12:00:20,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 5095 transitions. [2021-08-21 12:00:20,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:00:20,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:20,367 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:20,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 12:00:20,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:20,568 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:20,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:20,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1249206716, now seen corresponding path program 35 times [2021-08-21 12:00:20,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:20,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546133659] [2021-08-21 12:00:20,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:20,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:20,658 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:20,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:20,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546133659] [2021-08-21 12:00:20,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546133659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:20,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073407807] [2021-08-21 12:00:20,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:20,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:20,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:20,659 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) [2021-08-21 12:00:20,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 12:00:22,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:00:22,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:22,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:22,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:22,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073407807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:22,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:22,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-08-21 12:00:22,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977849820] [2021-08-21 12:00:22,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:22,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:22,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:22,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:22,744 INFO L87 Difference]: Start difference. First operand 2084 states and 5095 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:22,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:22,907 INFO L93 Difference]: Finished difference Result 2889 states and 6691 transitions. [2021-08-21 12:00:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:00:22,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-21 12:00:22,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:22,911 INFO L225 Difference]: With dead ends: 2889 [2021-08-21 12:00:22,912 INFO L226 Difference]: Without dead ends: 2865 [2021-08-21 12:00:22,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-08-21 12:00:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2164. [2021-08-21 12:00:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2163 states have (on average 2.4678687008784097) internal successors, (5338), 2163 states have internal predecessors, (5338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 5338 transitions. [2021-08-21 12:00:22,944 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 5338 transitions. Word has length 35 [2021-08-21 12:00:22,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:22,944 INFO L470 AbstractCegarLoop]: Abstraction has 2164 states and 5338 transitions. [2021-08-21 12:00:22,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 5338 transitions. [2021-08-21 12:00:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:00:22,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:22,946 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:22,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 12:00:23,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:23,147 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:23,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:23,147 INFO L82 PathProgramCache]: Analyzing trace with hash -128515859, now seen corresponding path program 36 times [2021-08-21 12:00:23,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:23,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092421542] [2021-08-21 12:00:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:23,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:23,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:23,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092421542] [2021-08-21 12:00:23,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092421542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:23,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957280021] [2021-08-21 12:00:23,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:23,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:23,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:23,253 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) [2021-08-21 12:00:23,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 12:00:25,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:00:25,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:25,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:00:25,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:25,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957280021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:25,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:25,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:00:25,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925993933] [2021-08-21 12:00:25,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:00:25,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:25,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:00:25,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:25,160 INFO L87 Difference]: Start difference. First operand 2164 states and 5338 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) [2021-08-21 12:00:25,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:25,613 INFO L93 Difference]: Finished difference Result 3794 states and 8733 transitions. [2021-08-21 12:00:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:00:25,613 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 [2021-08-21 12:00:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:25,619 INFO L225 Difference]: With dead ends: 3794 [2021-08-21 12:00:25,620 INFO L226 Difference]: Without dead ends: 3680 [2021-08-21 12:00:25,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 248.1ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:00:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2021-08-21 12:00:25,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 2276. [2021-08-21 12:00:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.474285714285714) internal successors, (5629), 2275 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5629 transitions. [2021-08-21 12:00:25,689 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5629 transitions. Word has length 35 [2021-08-21 12:00:25,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:25,689 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 5629 transitions. [2021-08-21 12:00:25,689 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) [2021-08-21 12:00:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5629 transitions. [2021-08-21 12:00:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:00:25,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:25,692 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:25,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 12:00:25,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:25,892 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:25,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:25,893 INFO L82 PathProgramCache]: Analyzing trace with hash 258086818, now seen corresponding path program 37 times [2021-08-21 12:00:25,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:25,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668280117] [2021-08-21 12:00:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:25,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:26,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:26,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668280117] [2021-08-21 12:00:26,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668280117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:26,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264366179] [2021-08-21 12:00:26,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:26,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:26,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:26,010 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) [2021-08-21 12:00:26,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 12:00:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:27,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:27,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:28,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264366179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:28,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:28,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:00:28,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043110500] [2021-08-21 12:00:28,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:28,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:28,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:28,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:28,011 INFO L87 Difference]: Start difference. First operand 2276 states and 5629 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2021-08-21 12:00:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:28,158 INFO L93 Difference]: Finished difference Result 2985 states and 6922 transitions. [2021-08-21 12:00:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:00:28,159 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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 35 [2021-08-21 12:00:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:28,163 INFO L225 Difference]: With dead ends: 2985 [2021-08-21 12:00:28,163 INFO L226 Difference]: Without dead ends: 2949 [2021-08-21 12:00:28,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:28,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-08-21 12:00:28,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2276. [2021-08-21 12:00:28,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.4725274725274726) internal successors, (5625), 2275 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5625 transitions. [2021-08-21 12:00:28,195 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5625 transitions. Word has length 35 [2021-08-21 12:00:28,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:28,195 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 5625 transitions. [2021-08-21 12:00:28,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 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) [2021-08-21 12:00:28,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5625 transitions. [2021-08-21 12:00:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:00:28,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:28,198 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:28,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-21 12:00:28,398 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,SelfDestructingSolverStorable110 [2021-08-21 12:00:28,398 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:28,399 INFO L82 PathProgramCache]: Analyzing trace with hash -188207369, now seen corresponding path program 38 times [2021-08-21 12:00:28,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:28,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343734875] [2021-08-21 12:00:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:28,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:28,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:28,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343734875] [2021-08-21 12:00:28,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343734875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:28,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026689672] [2021-08-21 12:00:28,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:28,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:28,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:28,516 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) [2021-08-21 12:00:28,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 12:00:30,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:30,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:30,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 12:00:30,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:30,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026689672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:30,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:30,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:00:30,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166216833] [2021-08-21 12:00:30,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:30,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:30,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:30,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:30,477 INFO L87 Difference]: Start difference. First operand 2276 states and 5625 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) [2021-08-21 12:00:30,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:30,829 INFO L93 Difference]: Finished difference Result 3037 states and 7074 transitions. [2021-08-21 12:00:30,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:00:30,830 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 [2021-08-21 12:00:30,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:30,835 INFO L225 Difference]: With dead ends: 3037 [2021-08-21 12:00:30,835 INFO L226 Difference]: Without dead ends: 2881 [2021-08-21 12:00:30,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:00:30,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-08-21 12:00:30,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 2074. [2021-08-21 12:00:30,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 2.4582730342498795) internal successors, (5096), 2073 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:30,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 5096 transitions. [2021-08-21 12:00:30,871 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 5096 transitions. Word has length 35 [2021-08-21 12:00:30,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:30,871 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 5096 transitions. [2021-08-21 12:00:30,871 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) [2021-08-21 12:00:30,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 5096 transitions. [2021-08-21 12:00:30,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:00:30,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:30,873 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:30,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 12:00:31,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:31,075 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:31,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:31,075 INFO L82 PathProgramCache]: Analyzing trace with hash -426268886, now seen corresponding path program 15 times [2021-08-21 12:00:31,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:31,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505808317] [2021-08-21 12:00:31,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:31,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:31,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:31,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505808317] [2021-08-21 12:00:31,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505808317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:31,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324335640] [2021-08-21 12:00:31,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:31,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:31,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:31,156 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) [2021-08-21 12:00:31,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 12:00:32,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:00:32,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:32,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:32,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:33,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324335640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:33,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:33,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-08-21 12:00:33,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535431126] [2021-08-21 12:00:33,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:00:33,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:33,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:00:33,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:00:33,139 INFO L87 Difference]: Start difference. First operand 2074 states and 5096 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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) [2021-08-21 12:00:33,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:33,341 INFO L93 Difference]: Finished difference Result 2850 states and 6708 transitions. [2021-08-21 12:00:33,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:00:33,341 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 35 [2021-08-21 12:00:33,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:33,346 INFO L225 Difference]: With dead ends: 2850 [2021-08-21 12:00:33,346 INFO L226 Difference]: Without dead ends: 2832 [2021-08-21 12:00:33,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:00:33,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-08-21 12:00:33,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2298. [2021-08-21 12:00:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 2.4902046147148456) internal successors, (5720), 2297 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 5720 transitions. [2021-08-21 12:00:33,379 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 5720 transitions. Word has length 35 [2021-08-21 12:00:33,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:33,379 INFO L470 AbstractCegarLoop]: Abstraction has 2298 states and 5720 transitions. [2021-08-21 12:00:33,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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) [2021-08-21 12:00:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 5720 transitions. [2021-08-21 12:00:33,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:00:33,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:33,382 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:33,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:33,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:33,597 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:33,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1048149296, now seen corresponding path program 16 times [2021-08-21 12:00:33,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:33,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664925700] [2021-08-21 12:00:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:33,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:33,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:33,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664925700] [2021-08-21 12:00:33,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664925700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:33,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952519540] [2021-08-21 12:00:33,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:33,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:33,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:33,704 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) [2021-08-21 12:00:33,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 12:00:35,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:35,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:35,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:00:35,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:35,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952519540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:35,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:35,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-08-21 12:00:35,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875498377] [2021-08-21 12:00:35,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:00:35,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:35,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:00:35,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:00:35,760 INFO L87 Difference]: Start difference. First operand 2298 states and 5720 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) [2021-08-21 12:00:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:36,020 INFO L93 Difference]: Finished difference Result 2847 states and 6724 transitions. [2021-08-21 12:00:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:00:36,021 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 35 [2021-08-21 12:00:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:36,025 INFO L225 Difference]: With dead ends: 2847 [2021-08-21 12:00:36,026 INFO L226 Difference]: Without dead ends: 2847 [2021-08-21 12:00:36,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:00:36,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-08-21 12:00:36,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2179. [2021-08-21 12:00:36,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 2.4724517906336088) internal successors, (5385), 2178 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 5385 transitions. [2021-08-21 12:00:36,057 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 5385 transitions. Word has length 35 [2021-08-21 12:00:36,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:36,057 INFO L470 AbstractCegarLoop]: Abstraction has 2179 states and 5385 transitions. [2021-08-21 12:00:36,058 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) [2021-08-21 12:00:36,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 5385 transitions. [2021-08-21 12:00:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 12:00:36,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:36,060 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:36,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-21 12:00:36,260 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,SelfDestructingSolverStorable113 [2021-08-21 12:00:36,260 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:36,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1705365500, now seen corresponding path program 39 times [2021-08-21 12:00:36,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:36,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50697386] [2021-08-21 12:00:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:36,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:36,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:36,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50697386] [2021-08-21 12:00:36,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50697386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:36,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859324932] [2021-08-21 12:00:36,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:36,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:36,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:36,377 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) [2021-08-21 12:00:36,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 12:00:38,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:00:38,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:38,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:00:38,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:38,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859324932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:38,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:38,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:00:38,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415842442] [2021-08-21 12:00:38,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:00:38,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:38,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:00:38,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:00:38,511 INFO L87 Difference]: Start difference. First operand 2179 states and 5385 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) [2021-08-21 12:00:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:38,695 INFO L93 Difference]: Finished difference Result 2663 states and 6272 transitions. [2021-08-21 12:00:38,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:00:38,695 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 35 [2021-08-21 12:00:38,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:38,699 INFO L225 Difference]: With dead ends: 2663 [2021-08-21 12:00:38,699 INFO L226 Difference]: Without dead ends: 2616 [2021-08-21 12:00:38,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:00:38,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-08-21 12:00:38,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2188. [2021-08-21 12:00:38,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.4686785550983084) internal successors, (5399), 2187 states have internal predecessors, (5399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:38,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 5399 transitions. [2021-08-21 12:00:38,729 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 5399 transitions. Word has length 35 [2021-08-21 12:00:38,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:38,729 INFO L470 AbstractCegarLoop]: Abstraction has 2188 states and 5399 transitions. [2021-08-21 12:00:38,730 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) [2021-08-21 12:00:38,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 5399 transitions. [2021-08-21 12:00:38,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:38,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:38,732 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:38,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 12:00:38,932 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,SelfDestructingSolverStorable114 [2021-08-21 12:00:38,933 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:38,933 INFO L82 PathProgramCache]: Analyzing trace with hash 237519579, now seen corresponding path program 40 times [2021-08-21 12:00:38,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:38,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997905403] [2021-08-21 12:00:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:38,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:39,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:39,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997905403] [2021-08-21 12:00:39,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997905403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:39,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020426717] [2021-08-21 12:00:39,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:00:39,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:39,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:39,013 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) [2021-08-21 12:00:39,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 12:00:40,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:00:40,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:40,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:00:40,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:41,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020426717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:41,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:41,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 16 [2021-08-21 12:00:41,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504096478] [2021-08-21 12:00:41,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:00:41,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:41,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:00:41,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:00:41,373 INFO L87 Difference]: Start difference. First operand 2188 states and 5399 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) [2021-08-21 12:00:42,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:42,269 INFO L93 Difference]: Finished difference Result 3588 states and 8244 transitions. [2021-08-21 12:00:42,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:00:42,270 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 [2021-08-21 12:00:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:42,278 INFO L225 Difference]: With dead ends: 3588 [2021-08-21 12:00:42,279 INFO L226 Difference]: Without dead ends: 3550 [2021-08-21 12:00:42,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 472.1ms TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:00:42,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2021-08-21 12:00:42,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2578. [2021-08-21 12:00:42,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2577 states have (on average 2.43500194024059) internal successors, (6275), 2577 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:42,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 6275 transitions. [2021-08-21 12:00:42,318 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 6275 transitions. Word has length 38 [2021-08-21 12:00:42,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:42,318 INFO L470 AbstractCegarLoop]: Abstraction has 2578 states and 6275 transitions. [2021-08-21 12:00:42,318 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) [2021-08-21 12:00:42,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 6275 transitions. [2021-08-21 12:00:42,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:42,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:42,322 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:42,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 12:00:42,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:42,549 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:42,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:42,549 INFO L82 PathProgramCache]: Analyzing trace with hash 207335165, now seen corresponding path program 41 times [2021-08-21 12:00:42,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:42,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286852225] [2021-08-21 12:00:42,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:42,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 12:00:42,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:42,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286852225] [2021-08-21 12:00:42,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286852225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:42,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809218254] [2021-08-21 12:00:42,618 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:42,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:42,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:42,620 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) [2021-08-21 12:00:42,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 12:00:44,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:00:44,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:44,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:00:44,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 12:00:44,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809218254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:44,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:44,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:00:44,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418574165] [2021-08-21 12:00:44,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:00:44,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:44,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:00:44,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:00:44,739 INFO L87 Difference]: Start difference. First operand 2578 states and 6275 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) [2021-08-21 12:00:44,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:44,898 INFO L93 Difference]: Finished difference Result 3224 states and 7683 transitions. [2021-08-21 12:00:44,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:00:44,898 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 [2021-08-21 12:00:44,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:44,903 INFO L225 Difference]: With dead ends: 3224 [2021-08-21 12:00:44,903 INFO L226 Difference]: Without dead ends: 3189 [2021-08-21 12:00:44,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:00:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-08-21 12:00:44,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2741. [2021-08-21 12:00:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 2740 states have (on average 2.4572992700729928) internal successors, (6733), 2740 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 6733 transitions. [2021-08-21 12:00:44,939 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 6733 transitions. Word has length 38 [2021-08-21 12:00:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:44,939 INFO L470 AbstractCegarLoop]: Abstraction has 2741 states and 6733 transitions. [2021-08-21 12:00:44,939 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) [2021-08-21 12:00:44,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 6733 transitions. [2021-08-21 12:00:44,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:44,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:44,942 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:44,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 12:00:45,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:45,143 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:45,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:45,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1863963929, now seen corresponding path program 42 times [2021-08-21 12:00:45,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:45,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288956794] [2021-08-21 12:00:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:45,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 12:00:45,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:45,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288956794] [2021-08-21 12:00:45,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288956794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:45,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323696438] [2021-08-21 12:00:45,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:00:45,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:45,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:45,242 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) [2021-08-21 12:00:45,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 12:00:47,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-21 12:00:47,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:47,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 12:00:47,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:00:47,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323696438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:47,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:47,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-08-21 12:00:47,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325856764] [2021-08-21 12:00:47,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:00:47,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:47,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:00:47,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:00:47,574 INFO L87 Difference]: Start difference. First operand 2741 states and 6733 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 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) [2021-08-21 12:00:48,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:48,133 INFO L93 Difference]: Finished difference Result 4464 states and 10129 transitions. [2021-08-21 12:00:48,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:00:48,134 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 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 38 [2021-08-21 12:00:48,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:48,140 INFO L225 Difference]: With dead ends: 4464 [2021-08-21 12:00:48,140 INFO L226 Difference]: Without dead ends: 4401 [2021-08-21 12:00:48,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:00:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-08-21 12:00:48,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 2892. [2021-08-21 12:00:48,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2891 states have (on average 2.4787270840539604) internal successors, (7166), 2891 states have internal predecessors, (7166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 7166 transitions. [2021-08-21 12:00:48,186 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 7166 transitions. Word has length 38 [2021-08-21 12:00:48,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:48,186 INFO L470 AbstractCegarLoop]: Abstraction has 2892 states and 7166 transitions. [2021-08-21 12:00:48,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 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) [2021-08-21 12:00:48,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 7166 transitions. [2021-08-21 12:00:48,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 12:00:48,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:48,189 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:48,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 12:00:48,389 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,SelfDestructingSolverStorable117 [2021-08-21 12:00:48,390 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:48,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:48,390 INFO L82 PathProgramCache]: Analyzing trace with hash 254200473, now seen corresponding path program 43 times [2021-08-21 12:00:48,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:48,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425217381] [2021-08-21 12:00:48,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:48,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:00:48,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:48,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425217381] [2021-08-21 12:00:48,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425217381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:48,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033555756] [2021-08-21 12:00:48,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:00:48,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:48,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:48,469 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) [2021-08-21 12:00:48,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 12:00:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:50,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:00:50,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:00:50,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033555756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:50,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:50,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:00:50,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203103505] [2021-08-21 12:00:50,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:00:50,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:50,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:00:50,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:00:50,675 INFO L87 Difference]: Start difference. First operand 2892 states and 7166 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-08-21 12:00:50,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:50,827 INFO L93 Difference]: Finished difference Result 3617 states and 8704 transitions. [2021-08-21 12:00:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:00:50,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 38 [2021-08-21 12:00:50,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:50,833 INFO L225 Difference]: With dead ends: 3617 [2021-08-21 12:00:50,833 INFO L226 Difference]: Without dead ends: 3592 [2021-08-21 12:00:50,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:00:50,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2021-08-21 12:00:50,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3175. [2021-08-21 12:00:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 2.4697542533081287) internal successors, (7839), 3174 states have internal predecessors, (7839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 7839 transitions. [2021-08-21 12:00:50,881 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 7839 transitions. Word has length 38 [2021-08-21 12:00:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:50,881 INFO L470 AbstractCegarLoop]: Abstraction has 3175 states and 7839 transitions. [2021-08-21 12:00:50,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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) [2021-08-21 12:00:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 7839 transitions. [2021-08-21 12:00:50,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:00:50,885 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:50,885 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:50,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-21 12:00:51,086 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,SelfDestructingSolverStorable118 [2021-08-21 12:00:51,086 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:51,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1532856280, now seen corresponding path program 17 times [2021-08-21 12:00:51,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:51,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040689810] [2021-08-21 12:00:51,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:51,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:51,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:51,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040689810] [2021-08-21 12:00:51,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040689810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:51,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312949372] [2021-08-21 12:00:51,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:00:51,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:51,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:51,217 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) [2021-08-21 12:00:51,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 12:00:53,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:00:53,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:53,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:00:53,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:53,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312949372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:53,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:53,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:00:53,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354367982] [2021-08-21 12:00:53,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:00:53,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:53,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:00:53,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:00:53,473 INFO L87 Difference]: Start difference. First operand 3175 states and 7839 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) [2021-08-21 12:00:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:54,007 INFO L93 Difference]: Finished difference Result 4225 states and 9893 transitions. [2021-08-21 12:00:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:00:54,008 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 [2021-08-21 12:00:54,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:54,014 INFO L225 Difference]: With dead ends: 4225 [2021-08-21 12:00:54,014 INFO L226 Difference]: Without dead ends: 4189 [2021-08-21 12:00:54,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:00:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-08-21 12:00:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3084. [2021-08-21 12:00:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 2.480051897502433) internal successors, (7646), 3083 states have internal predecessors, (7646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7646 transitions. [2021-08-21 12:00:54,062 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7646 transitions. Word has length 41 [2021-08-21 12:00:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:54,063 INFO L470 AbstractCegarLoop]: Abstraction has 3084 states and 7646 transitions. [2021-08-21 12:00:54,063 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) [2021-08-21 12:00:54,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7646 transitions. [2021-08-21 12:00:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:00:54,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:54,066 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:54,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:54,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:54,267 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:54,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1309554728, now seen corresponding path program 44 times [2021-08-21 12:00:54,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:54,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346858610] [2021-08-21 12:00:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:54,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:54,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:54,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346858610] [2021-08-21 12:00:54,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346858610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:54,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755941876] [2021-08-21 12:00:54,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:00:54,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:54,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:54,432 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) [2021-08-21 12:00:54,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 12:00:56,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:00:56,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:56,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:00:56,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:00:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:00:56,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755941876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:56,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:00:56,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 12:00:56,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822446418] [2021-08-21 12:00:56,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:00:56,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:00:56,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:00:56,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:00:56,844 INFO L87 Difference]: Start difference. First operand 3084 states and 7646 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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) [2021-08-21 12:00:57,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:00:57,491 INFO L93 Difference]: Finished difference Result 3304 states and 7993 transitions. [2021-08-21 12:00:57,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:00:57,492 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 41 [2021-08-21 12:00:57,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:00:57,497 INFO L225 Difference]: With dead ends: 3304 [2021-08-21 12:00:57,497 INFO L226 Difference]: Without dead ends: 3236 [2021-08-21 12:00:57,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:00:57,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-08-21 12:00:57,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3084. [2021-08-21 12:00:57,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 2.474862147259163) internal successors, (7630), 3083 states have internal predecessors, (7630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:00:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7630 transitions. [2021-08-21 12:00:57,540 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7630 transitions. Word has length 41 [2021-08-21 12:00:57,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:00:57,540 INFO L470 AbstractCegarLoop]: Abstraction has 3084 states and 7630 transitions. [2021-08-21 12:00:57,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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) [2021-08-21 12:00:57,540 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7630 transitions. [2021-08-21 12:00:57,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:00:57,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:00:57,544 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:00:57,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 12:00:57,748 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,SelfDestructingSolverStorable120 [2021-08-21 12:00:57,749 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:00:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:00:57,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1255677656, now seen corresponding path program 45 times [2021-08-21 12:00:57,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:00:57,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870950483] [2021-08-21 12:00:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:00:57,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:00:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:00:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:00:57,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:00:57,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870950483] [2021-08-21 12:00:57,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870950483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:00:57,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987481217] [2021-08-21 12:00:57,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:00:57,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:00:57,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:00:57,891 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) [2021-08-21 12:00:57,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 12:00:59,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:00:59,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:00:59,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:00:59,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:00,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987481217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:00,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:00,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:01:00,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163139689] [2021-08-21 12:01:00,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:01:00,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:00,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:01:00,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:01:00,135 INFO L87 Difference]: Start difference. First operand 3084 states and 7630 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) [2021-08-21 12:01:00,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:00,356 INFO L93 Difference]: Finished difference Result 3450 states and 8325 transitions. [2021-08-21 12:01:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:01:00,357 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 [2021-08-21 12:01:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:00,362 INFO L225 Difference]: With dead ends: 3450 [2021-08-21 12:01:00,362 INFO L226 Difference]: Without dead ends: 3450 [2021-08-21 12:01:00,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:00,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3450 states. [2021-08-21 12:01:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3450 to 3096. [2021-08-21 12:01:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 3095 states have (on average 2.477221324717286) internal successors, (7667), 3095 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:00,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 7667 transitions. [2021-08-21 12:01:00,406 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 7667 transitions. Word has length 41 [2021-08-21 12:01:00,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:00,406 INFO L470 AbstractCegarLoop]: Abstraction has 3096 states and 7667 transitions. [2021-08-21 12:01:00,406 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) [2021-08-21 12:01:00,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 7667 transitions. [2021-08-21 12:01:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:00,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:00,410 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:00,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 12:01:00,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:00,611 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:00,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:00,611 INFO L82 PathProgramCache]: Analyzing trace with hash 482486773, now seen corresponding path program 18 times [2021-08-21 12:01:00,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:00,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166857624] [2021-08-21 12:01:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:00,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:00,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:00,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166857624] [2021-08-21 12:01:00,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166857624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:00,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750897945] [2021-08-21 12:01:00,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:00,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:00,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:00,744 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) [2021-08-21 12:01:00,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 12:01:02,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:01:02,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:02,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:01:02,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:03,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750897945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:03,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:03,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2021-08-21 12:01:03,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785331219] [2021-08-21 12:01:03,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:01:03,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:03,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:01:03,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:01:03,122 INFO L87 Difference]: Start difference. First operand 3096 states and 7667 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) [2021-08-21 12:01:03,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:03,380 INFO L93 Difference]: Finished difference Result 4321 states and 10236 transitions. [2021-08-21 12:01:03,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:01:03,380 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 41 [2021-08-21 12:01:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:03,386 INFO L225 Difference]: With dead ends: 4321 [2021-08-21 12:01:03,386 INFO L226 Difference]: Without dead ends: 4263 [2021-08-21 12:01:03,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:01:03,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2021-08-21 12:01:03,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 3240. [2021-08-21 12:01:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 3239 states have (on average 2.4902747761654833) internal successors, (8066), 3239 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 8066 transitions. [2021-08-21 12:01:03,435 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 8066 transitions. Word has length 41 [2021-08-21 12:01:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:03,435 INFO L470 AbstractCegarLoop]: Abstraction has 3240 states and 8066 transitions. [2021-08-21 12:01:03,435 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) [2021-08-21 12:01:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 8066 transitions. [2021-08-21 12:01:03,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:03,439 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:03,439 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:03,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:03,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 12:01:03,641 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:03,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:03,641 INFO L82 PathProgramCache]: Analyzing trace with hash -173209317, now seen corresponding path program 19 times [2021-08-21 12:01:03,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:03,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372695971] [2021-08-21 12:01:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:03,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:03,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:03,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372695971] [2021-08-21 12:01:03,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372695971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:03,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747253552] [2021-08-21 12:01:03,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:03,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:03,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:03,752 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) [2021-08-21 12:01:03,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 12:01:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:05,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:01:05,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:06,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747253552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:06,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:06,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:06,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848447378] [2021-08-21 12:01:06,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:06,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:06,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:06,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:06,119 INFO L87 Difference]: Start difference. First operand 3240 states and 8066 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) [2021-08-21 12:01:06,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:06,268 INFO L93 Difference]: Finished difference Result 4797 states and 11528 transitions. [2021-08-21 12:01:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:01:06,269 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 41 [2021-08-21 12:01:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:06,276 INFO L225 Difference]: With dead ends: 4797 [2021-08-21 12:01:06,277 INFO L226 Difference]: Without dead ends: 4797 [2021-08-21 12:01:06,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:01:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-08-21 12:01:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3486. [2021-08-21 12:01:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 2.5265423242467717) internal successors, (8805), 3485 states have internal predecessors, (8805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 8805 transitions. [2021-08-21 12:01:06,333 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 8805 transitions. Word has length 41 [2021-08-21 12:01:06,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:06,333 INFO L470 AbstractCegarLoop]: Abstraction has 3486 states and 8805 transitions. [2021-08-21 12:01:06,333 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) [2021-08-21 12:01:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 8805 transitions. [2021-08-21 12:01:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:06,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:06,338 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:06,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:06,538 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,SelfDestructingSolverStorable123 [2021-08-21 12:01:06,538 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:06,539 INFO L82 PathProgramCache]: Analyzing trace with hash -707074693, now seen corresponding path program 46 times [2021-08-21 12:01:06,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:06,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660483673] [2021-08-21 12:01:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:06,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:06,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:06,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660483673] [2021-08-21 12:01:06,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660483673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:06,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143220820] [2021-08-21 12:01:06,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:06,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:06,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:06,647 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) [2021-08-21 12:01:06,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 12:01:08,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:08,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:08,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:01:08,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:08,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143220820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:08,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:08,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:08,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112978463] [2021-08-21 12:01:08,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:08,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:08,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:08,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:08,995 INFO L87 Difference]: Start difference. First operand 3486 states and 8805 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) [2021-08-21 12:01:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:09,140 INFO L93 Difference]: Finished difference Result 3733 states and 9242 transitions. [2021-08-21 12:01:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:01:09,140 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 41 [2021-08-21 12:01:09,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:09,146 INFO L225 Difference]: With dead ends: 3733 [2021-08-21 12:01:09,146 INFO L226 Difference]: Without dead ends: 3727 [2021-08-21 12:01:09,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:09,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-08-21 12:01:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3447. [2021-08-21 12:01:09,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 2.5194428322692977) internal successors, (8682), 3446 states have internal predecessors, (8682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 8682 transitions. [2021-08-21 12:01:09,224 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 8682 transitions. Word has length 41 [2021-08-21 12:01:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:09,224 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 8682 transitions. [2021-08-21 12:01:09,224 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) [2021-08-21 12:01:09,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 8682 transitions. [2021-08-21 12:01:09,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:09,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:09,228 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:09,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:09,430 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,SelfDestructingSolverStorable124 [2021-08-21 12:01:09,430 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:09,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:09,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1766490874, now seen corresponding path program 20 times [2021-08-21 12:01:09,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:09,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465220140] [2021-08-21 12:01:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:09,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:09,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:09,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465220140] [2021-08-21 12:01:09,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465220140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:09,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751677017] [2021-08-21 12:01:09,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:09,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:09,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:09,537 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) [2021-08-21 12:01:09,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 12:01:11,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:11,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:11,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:01:11,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:11,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751677017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:11,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:11,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:01:11,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772595898] [2021-08-21 12:01:11,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:01:11,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:11,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:01:11,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:01:11,850 INFO L87 Difference]: Start difference. First operand 3447 states and 8682 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) [2021-08-21 12:01:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:12,125 INFO L93 Difference]: Finished difference Result 4309 states and 10396 transitions. [2021-08-21 12:01:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:01:12,125 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 [2021-08-21 12:01:12,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:12,131 INFO L225 Difference]: With dead ends: 4309 [2021-08-21 12:01:12,131 INFO L226 Difference]: Without dead ends: 4278 [2021-08-21 12:01:12,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:12,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-08-21 12:01:12,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3497. [2021-08-21 12:01:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3497 states, 3496 states have (on average 2.5160183066361554) internal successors, (8796), 3496 states have internal predecessors, (8796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 8796 transitions. [2021-08-21 12:01:12,184 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 8796 transitions. Word has length 41 [2021-08-21 12:01:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:12,184 INFO L470 AbstractCegarLoop]: Abstraction has 3497 states and 8796 transitions. [2021-08-21 12:01:12,184 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) [2021-08-21 12:01:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 8796 transitions. [2021-08-21 12:01:12,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:12,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:12,189 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:12,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-21 12:01:12,389 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,SelfDestructingSolverStorable125 [2021-08-21 12:01:12,390 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:12,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:12,390 INFO L82 PathProgramCache]: Analyzing trace with hash 974779565, now seen corresponding path program 47 times [2021-08-21 12:01:12,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:12,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465587525] [2021-08-21 12:01:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:12,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:12,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:12,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465587525] [2021-08-21 12:01:12,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465587525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:12,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785262133] [2021-08-21 12:01:12,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:12,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:12,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:12,484 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) [2021-08-21 12:01:12,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 12:01:14,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:01:14,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:14,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:01:14,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:14,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785262133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:14,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:14,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-08-21 12:01:14,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550664350] [2021-08-21 12:01:14,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:01:14,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:14,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:01:14,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:14,896 INFO L87 Difference]: Start difference. First operand 3497 states and 8796 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) [2021-08-21 12:01:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:15,137 INFO L93 Difference]: Finished difference Result 4421 states and 10653 transitions. [2021-08-21 12:01:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:01:15,137 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 [2021-08-21 12:01:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:15,144 INFO L225 Difference]: With dead ends: 4421 [2021-08-21 12:01:15,144 INFO L226 Difference]: Without dead ends: 4412 [2021-08-21 12:01:15,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:01:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4412 states. [2021-08-21 12:01:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4412 to 3587. [2021-08-21 12:01:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.5312325711098715) internal successors, (9077), 3586 states have internal predecessors, (9077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9077 transitions. [2021-08-21 12:01:15,198 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9077 transitions. Word has length 41 [2021-08-21 12:01:15,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:15,198 INFO L470 AbstractCegarLoop]: Abstraction has 3587 states and 9077 transitions. [2021-08-21 12:01:15,198 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) [2021-08-21 12:01:15,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9077 transitions. [2021-08-21 12:01:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:15,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:15,202 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:15,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:15,409 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,SelfDestructingSolverStorable126 [2021-08-21 12:01:15,409 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:15,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:15,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1181842131, now seen corresponding path program 48 times [2021-08-21 12:01:15,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:15,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378657370] [2021-08-21 12:01:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:15,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:15,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:15,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378657370] [2021-08-21 12:01:15,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378657370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:15,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396663876] [2021-08-21 12:01:15,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:15,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:15,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:15,513 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) [2021-08-21 12:01:15,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 12:01:17,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:01:17,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:17,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:01:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:01:17,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396663876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:17,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:17,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:17,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368713725] [2021-08-21 12:01:17,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:17,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:17,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:17,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:17,934 INFO L87 Difference]: Start difference. First operand 3587 states and 9077 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-08-21 12:01:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:18,133 INFO L93 Difference]: Finished difference Result 4253 states and 10263 transitions. [2021-08-21 12:01:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:01:18,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 [2021-08-21 12:01:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:18,143 INFO L225 Difference]: With dead ends: 4253 [2021-08-21 12:01:18,143 INFO L226 Difference]: Without dead ends: 4235 [2021-08-21 12:01:18,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:18,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-08-21 12:01:18,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 3587. [2021-08-21 12:01:18,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.5284439486893473) internal successors, (9067), 3586 states have internal predecessors, (9067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9067 transitions. [2021-08-21 12:01:18,219 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9067 transitions. Word has length 41 [2021-08-21 12:01:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:18,219 INFO L470 AbstractCegarLoop]: Abstraction has 3587 states and 9067 transitions. [2021-08-21 12:01:18,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-08-21 12:01:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9067 transitions. [2021-08-21 12:01:18,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:18,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:18,225 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:18,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:18,440 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,SelfDestructingSolverStorable127 [2021-08-21 12:01:18,441 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash -266157882, now seen corresponding path program 49 times [2021-08-21 12:01:18,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:18,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956362499] [2021-08-21 12:01:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:18,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:18,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:18,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956362499] [2021-08-21 12:01:18,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956362499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:18,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774575505] [2021-08-21 12:01:18,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:18,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:18,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:18,552 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) [2021-08-21 12:01:18,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 12:01:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:20,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:01:20,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:20,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774575505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:20,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:20,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:01:20,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012367107] [2021-08-21 12:01:20,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:01:20,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:20,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:01:20,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:01:20,987 INFO L87 Difference]: Start difference. First operand 3587 states and 9067 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) [2021-08-21 12:01:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:21,302 INFO L93 Difference]: Finished difference Result 4054 states and 9921 transitions. [2021-08-21 12:01:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:01:21,302 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 [2021-08-21 12:01:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:21,308 INFO L225 Difference]: With dead ends: 4054 [2021-08-21 12:01:21,309 INFO L226 Difference]: Without dead ends: 4016 [2021-08-21 12:01:21,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2021-08-21 12:01:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3593. [2021-08-21 12:01:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3592 states have (on average 2.525055679287305) internal successors, (9070), 3592 states have internal predecessors, (9070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 9070 transitions. [2021-08-21 12:01:21,359 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 9070 transitions. Word has length 41 [2021-08-21 12:01:21,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:21,359 INFO L470 AbstractCegarLoop]: Abstraction has 3593 states and 9070 transitions. [2021-08-21 12:01:21,359 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) [2021-08-21 12:01:21,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 9070 transitions. [2021-08-21 12:01:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:21,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:21,364 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:21,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:21,564 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,SelfDestructingSolverStorable128 [2021-08-21 12:01:21,564 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash -879694062, now seen corresponding path program 50 times [2021-08-21 12:01:21,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:21,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071247467] [2021-08-21 12:01:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:21,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:01:21,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:21,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071247467] [2021-08-21 12:01:21,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071247467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:21,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63269754] [2021-08-21 12:01:21,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:21,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:21,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:21,670 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) [2021-08-21 12:01:21,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 12:01:23,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:23,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:23,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:01:23,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:01:24,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63269754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:24,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:24,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:01:24,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800132162] [2021-08-21 12:01:24,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:01:24,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:24,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:01:24,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:01:24,079 INFO L87 Difference]: Start difference. First operand 3593 states and 9070 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) [2021-08-21 12:01:24,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:24,395 INFO L93 Difference]: Finished difference Result 4259 states and 10390 transitions. [2021-08-21 12:01:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:01:24,396 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 [2021-08-21 12:01:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:24,401 INFO L225 Difference]: With dead ends: 4259 [2021-08-21 12:01:24,401 INFO L226 Difference]: Without dead ends: 4247 [2021-08-21 12:01:24,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:24,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-08-21 12:01:24,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3595. [2021-08-21 12:01:24,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3595 states, 3594 states have (on average 2.5242070116861437) internal successors, (9072), 3594 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:24,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 9072 transitions. [2021-08-21 12:01:24,451 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 9072 transitions. Word has length 41 [2021-08-21 12:01:24,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:24,451 INFO L470 AbstractCegarLoop]: Abstraction has 3595 states and 9072 transitions. [2021-08-21 12:01:24,451 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) [2021-08-21 12:01:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 9072 transitions. [2021-08-21 12:01:24,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:24,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:24,455 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:24,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-21 12:01:24,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:24,656 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:24,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1262223272, now seen corresponding path program 51 times [2021-08-21 12:01:24,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:24,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211241439] [2021-08-21 12:01:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:24,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:24,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:24,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211241439] [2021-08-21 12:01:24,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211241439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:24,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596982545] [2021-08-21 12:01:24,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:24,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:24,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:24,758 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) [2021-08-21 12:01:24,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 12:01:27,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 12:01:27,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:27,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:01:27,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:27,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596982545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:27,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:27,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:27,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893268508] [2021-08-21 12:01:27,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:27,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:27,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:27,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:27,224 INFO L87 Difference]: Start difference. First operand 3595 states and 9072 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) [2021-08-21 12:01:27,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:27,585 INFO L93 Difference]: Finished difference Result 4613 states and 11146 transitions. [2021-08-21 12:01:27,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:01:27,585 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 [2021-08-21 12:01:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:27,592 INFO L225 Difference]: With dead ends: 4613 [2021-08-21 12:01:27,593 INFO L226 Difference]: Without dead ends: 4601 [2021-08-21 12:01:27,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:27,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-08-21 12:01:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3620. [2021-08-21 12:01:27,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 2.5230726720088423) internal successors, (9131), 3619 states have internal predecessors, (9131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 9131 transitions. [2021-08-21 12:01:27,647 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 9131 transitions. Word has length 41 [2021-08-21 12:01:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:27,647 INFO L470 AbstractCegarLoop]: Abstraction has 3620 states and 9131 transitions. [2021-08-21 12:01:27,647 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) [2021-08-21 12:01:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 9131 transitions. [2021-08-21 12:01:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:27,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:27,652 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:27,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-21 12:01:27,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:27,852 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:27,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1024161755, now seen corresponding path program 21 times [2021-08-21 12:01:27,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:27,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398781618] [2021-08-21 12:01:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:27,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:27,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:27,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398781618] [2021-08-21 12:01:27,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398781618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:27,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242902193] [2021-08-21 12:01:27,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:01:27,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:27,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:27,946 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) [2021-08-21 12:01:27,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 12:01:30,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:01:30,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:30,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:01:30,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:30,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242902193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:30,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:30,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:30,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902237983] [2021-08-21 12:01:30,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:30,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:30,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:30,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:30,474 INFO L87 Difference]: Start difference. First operand 3620 states and 9131 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) [2021-08-21 12:01:30,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:30,645 INFO L93 Difference]: Finished difference Result 4855 states and 11693 transitions. [2021-08-21 12:01:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:30,646 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 41 [2021-08-21 12:01:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:30,654 INFO L225 Difference]: With dead ends: 4855 [2021-08-21 12:01:30,654 INFO L226 Difference]: Without dead ends: 4847 [2021-08-21 12:01:30,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:30,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4847 states. [2021-08-21 12:01:30,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4847 to 3739. [2021-08-21 12:01:30,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 2.537720706260032) internal successors, (9486), 3738 states have internal predecessors, (9486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 9486 transitions. [2021-08-21 12:01:30,716 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 9486 transitions. Word has length 41 [2021-08-21 12:01:30,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:30,716 INFO L470 AbstractCegarLoop]: Abstraction has 3739 states and 9486 transitions. [2021-08-21 12:01:30,716 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) [2021-08-21 12:01:30,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 9486 transitions. [2021-08-21 12:01:30,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:30,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:30,720 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:30,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-21 12:01:30,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:30,921 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:30,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:30,921 INFO L82 PathProgramCache]: Analyzing trace with hash 402281345, now seen corresponding path program 22 times [2021-08-21 12:01:30,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:30,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811287594] [2021-08-21 12:01:30,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:30,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:31,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:31,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811287594] [2021-08-21 12:01:31,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811287594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:31,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539123416] [2021-08-21 12:01:31,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:31,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:31,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:31,026 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) [2021-08-21 12:01:31,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 12:01:33,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:33,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:33,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:01:33,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:33,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539123416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:33,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:33,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:33,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054554613] [2021-08-21 12:01:33,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:33,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:33,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:33,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:33,561 INFO L87 Difference]: Start difference. First operand 3739 states and 9486 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) [2021-08-21 12:01:33,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:33,735 INFO L93 Difference]: Finished difference Result 5507 states and 13181 transitions. [2021-08-21 12:01:33,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:33,735 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 41 [2021-08-21 12:01:33,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:33,744 INFO L225 Difference]: With dead ends: 5507 [2021-08-21 12:01:33,744 INFO L226 Difference]: Without dead ends: 5507 [2021-08-21 12:01:33,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:33,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-08-21 12:01:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 3748. [2021-08-21 12:01:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3747 states have (on average 2.536962903656258) internal successors, (9506), 3747 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 9506 transitions. [2021-08-21 12:01:33,812 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 9506 transitions. Word has length 41 [2021-08-21 12:01:33,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:33,812 INFO L470 AbstractCegarLoop]: Abstraction has 3748 states and 9506 transitions. [2021-08-21 12:01:33,812 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) [2021-08-21 12:01:33,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 9506 transitions. [2021-08-21 12:01:33,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:33,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:33,816 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:33,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:34,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:34,021 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:34,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:34,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1235291111, now seen corresponding path program 23 times [2021-08-21 12:01:34,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:34,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551404837] [2021-08-21 12:01:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:34,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:34,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:34,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551404837] [2021-08-21 12:01:34,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551404837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:34,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658058204] [2021-08-21 12:01:34,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:34,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:34,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:34,130 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) [2021-08-21 12:01:34,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 12:01:36,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:01:36,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:36,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:01:36,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:36,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658058204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:36,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:36,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-08-21 12:01:36,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182612066] [2021-08-21 12:01:36,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:01:36,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:36,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:01:36,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:01:36,765 INFO L87 Difference]: Start difference. First operand 3748 states and 9506 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) [2021-08-21 12:01:37,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:37,099 INFO L93 Difference]: Finished difference Result 5032 states and 12054 transitions. [2021-08-21 12:01:37,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:01:37,099 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 41 [2021-08-21 12:01:37,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:37,106 INFO L225 Difference]: With dead ends: 5032 [2021-08-21 12:01:37,107 INFO L226 Difference]: Without dead ends: 5032 [2021-08-21 12:01:37,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:01:37,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5032 states. [2021-08-21 12:01:37,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5032 to 3584. [2021-08-21 12:01:37,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 2.521629919062238) internal successors, (9035), 3583 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:37,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9035 transitions. [2021-08-21 12:01:37,170 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9035 transitions. Word has length 41 [2021-08-21 12:01:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:37,170 INFO L470 AbstractCegarLoop]: Abstraction has 3584 states and 9035 transitions. [2021-08-21 12:01:37,171 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) [2021-08-21 12:01:37,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9035 transitions. [2021-08-21 12:01:37,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:37,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:37,176 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:37,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-21 12:01:37,386 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,SelfDestructingSolverStorable133 [2021-08-21 12:01:37,386 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:37,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:37,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1500184915, now seen corresponding path program 52 times [2021-08-21 12:01:37,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:37,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262997296] [2021-08-21 12:01:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:37,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:37,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:37,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262997296] [2021-08-21 12:01:37,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262997296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:37,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87952248] [2021-08-21 12:01:37,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:01:37,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:37,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:37,500 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) [2021-08-21 12:01:37,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 12:01:39,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:01:39,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:39,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:01:39,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:40,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87952248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:40,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:40,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:01:40,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452220976] [2021-08-21 12:01:40,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:40,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:40,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:40,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:40,126 INFO L87 Difference]: Start difference. First operand 3584 states and 9035 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) [2021-08-21 12:01:40,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:40,299 INFO L93 Difference]: Finished difference Result 4100 states and 9963 transitions. [2021-08-21 12:01:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:40,299 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 41 [2021-08-21 12:01:40,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:40,306 INFO L225 Difference]: With dead ends: 4100 [2021-08-21 12:01:40,306 INFO L226 Difference]: Without dead ends: 4082 [2021-08-21 12:01:40,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:01:40,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-08-21 12:01:40,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3584. [2021-08-21 12:01:40,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 2.520234440413062) internal successors, (9030), 3583 states have internal predecessors, (9030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9030 transitions. [2021-08-21 12:01:40,357 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9030 transitions. Word has length 41 [2021-08-21 12:01:40,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:40,357 INFO L470 AbstractCegarLoop]: Abstraction has 3584 states and 9030 transitions. [2021-08-21 12:01:40,357 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) [2021-08-21 12:01:40,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9030 transitions. [2021-08-21 12:01:40,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:40,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:40,361 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:40,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-21 12:01:40,562 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,SelfDestructingSolverStorable134 [2021-08-21 12:01:40,562 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:40,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:40,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1686786410, now seen corresponding path program 24 times [2021-08-21 12:01:40,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:40,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348862631] [2021-08-21 12:01:40,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:40,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:40,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:40,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348862631] [2021-08-21 12:01:40,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348862631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:40,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514233613] [2021-08-21 12:01:40,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:40,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:40,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:40,674 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) [2021-08-21 12:01:40,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 12:01:43,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-21 12:01:43,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:43,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:01:43,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:43,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514233613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:43,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:43,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:01:43,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787947942] [2021-08-21 12:01:43,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:01:43,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:43,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:01:43,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:01:43,343 INFO L87 Difference]: Start difference. First operand 3584 states and 9030 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) [2021-08-21 12:01:43,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:43,640 INFO L93 Difference]: Finished difference Result 4419 states and 10697 transitions. [2021-08-21 12:01:43,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:01:43,640 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 [2021-08-21 12:01:43,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:43,647 INFO L225 Difference]: With dead ends: 4419 [2021-08-21 12:01:43,647 INFO L226 Difference]: Without dead ends: 4397 [2021-08-21 12:01:43,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:43,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2021-08-21 12:01:43,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 3612. [2021-08-21 12:01:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3612 states, 3611 states have (on average 2.5206314040432014) internal successors, (9102), 3611 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:43,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 9102 transitions. [2021-08-21 12:01:43,700 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 9102 transitions. Word has length 41 [2021-08-21 12:01:43,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:43,700 INFO L470 AbstractCegarLoop]: Abstraction has 3612 states and 9102 transitions. [2021-08-21 12:01:43,700 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) [2021-08-21 12:01:43,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 9102 transitions. [2021-08-21 12:01:43,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:43,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:43,704 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:43,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:43,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 12:01:43,905 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:43,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:43,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1107847894, now seen corresponding path program 53 times [2021-08-21 12:01:43,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:43,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118852660] [2021-08-21 12:01:43,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:43,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:44,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:44,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118852660] [2021-08-21 12:01:44,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118852660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:44,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134636230] [2021-08-21 12:01:44,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:01:44,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:44,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:44,017 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) [2021-08-21 12:01:44,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 12:01:46,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 12:01:46,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:46,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:01:46,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:46,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134636230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:46,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:46,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:01:46,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914449997] [2021-08-21 12:01:46,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:01:46,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:46,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:01:46,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:01:46,662 INFO L87 Difference]: Start difference. First operand 3612 states and 9102 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) [2021-08-21 12:01:47,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:47,020 INFO L93 Difference]: Finished difference Result 4113 states and 10023 transitions. [2021-08-21 12:01:47,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:01:47,021 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 [2021-08-21 12:01:47,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:47,028 INFO L225 Difference]: With dead ends: 4113 [2021-08-21 12:01:47,028 INFO L226 Difference]: Without dead ends: 4057 [2021-08-21 12:01:47,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:47,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-08-21 12:01:47,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 3639. [2021-08-21 12:01:47,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 2.51456844420011) internal successors, (9148), 3638 states have internal predecessors, (9148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 9148 transitions. [2021-08-21 12:01:47,079 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 9148 transitions. Word has length 41 [2021-08-21 12:01:47,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:47,079 INFO L470 AbstractCegarLoop]: Abstraction has 3639 states and 9148 transitions. [2021-08-21 12:01:47,079 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) [2021-08-21 12:01:47,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 9148 transitions. [2021-08-21 12:01:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:47,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:47,085 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:47,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-21 12:01:47,293 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,SelfDestructingSolverStorable136 [2021-08-21 12:01:47,293 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:47,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:47,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1721384074, now seen corresponding path program 54 times [2021-08-21 12:01:47,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:47,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742197319] [2021-08-21 12:01:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:47,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:01:47,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:47,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742197319] [2021-08-21 12:01:47,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742197319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:47,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003811420] [2021-08-21 12:01:47,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:01:47,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:47,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:47,413 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) [2021-08-21 12:01:47,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 12:01:49,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-21 12:01:49,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:49,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:01:49,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:01:50,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003811420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:50,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:50,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:01:50,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632164074] [2021-08-21 12:01:50,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:01:50,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:50,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:01:50,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:01:50,014 INFO L87 Difference]: Start difference. First operand 3639 states and 9148 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) [2021-08-21 12:01:50,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:50,275 INFO L93 Difference]: Finished difference Result 4375 states and 10599 transitions. [2021-08-21 12:01:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:01:50,275 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 [2021-08-21 12:01:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:50,282 INFO L225 Difference]: With dead ends: 4375 [2021-08-21 12:01:50,282 INFO L226 Difference]: Without dead ends: 4363 [2021-08-21 12:01:50,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:50,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-08-21 12:01:50,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3649. [2021-08-21 12:01:50,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 2.513157894736842) internal successors, (9168), 3648 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:50,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 9168 transitions. [2021-08-21 12:01:50,369 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 9168 transitions. Word has length 41 [2021-08-21 12:01:50,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:50,369 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 9168 transitions. [2021-08-21 12:01:50,369 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) [2021-08-21 12:01:50,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 9168 transitions. [2021-08-21 12:01:50,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:50,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:50,373 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:50,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-21 12:01:50,574 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,SelfDestructingSolverStorable137 [2021-08-21 12:01:50,574 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:50,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:50,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1878683561, now seen corresponding path program 25 times [2021-08-21 12:01:50,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:50,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312705779] [2021-08-21 12:01:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:50,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:50,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:50,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312705779] [2021-08-21 12:01:50,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312705779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:50,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376407300] [2021-08-21 12:01:50,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:50,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:50,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:50,698 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) [2021-08-21 12:01:50,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 12:01:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:53,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:01:53,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:01:53,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376407300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:53,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:53,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:01:53,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130255109] [2021-08-21 12:01:53,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:01:53,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:53,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:01:53,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:01:53,376 INFO L87 Difference]: Start difference. First operand 3649 states and 9168 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) [2021-08-21 12:01:53,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:53,562 INFO L93 Difference]: Finished difference Result 4653 states and 11200 transitions. [2021-08-21 12:01:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:01:53,563 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 41 [2021-08-21 12:01:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:53,570 INFO L225 Difference]: With dead ends: 4653 [2021-08-21 12:01:53,570 INFO L226 Difference]: Without dead ends: 4643 [2021-08-21 12:01:53,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:01:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4643 states. [2021-08-21 12:01:53,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4643 to 3759. [2021-08-21 12:01:53,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 2.5172964342735495) internal successors, (9460), 3758 states have internal predecessors, (9460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 9460 transitions. [2021-08-21 12:01:53,628 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 9460 transitions. Word has length 41 [2021-08-21 12:01:53,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:53,628 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 9460 transitions. [2021-08-21 12:01:53,628 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) [2021-08-21 12:01:53,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 9460 transitions. [2021-08-21 12:01:53,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:53,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:53,633 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:53,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-21 12:01:53,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:53,833 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:53,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:53,834 INFO L82 PathProgramCache]: Analyzing trace with hash 925225719, now seen corresponding path program 55 times [2021-08-21 12:01:53,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:53,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338009586] [2021-08-21 12:01:53,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:53,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:01:53,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:53,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338009586] [2021-08-21 12:01:53,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338009586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:53,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959747153] [2021-08-21 12:01:53,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:01:53,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:53,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:53,932 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) [2021-08-21 12:01:53,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 12:01:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:56,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:01:56,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:56,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959747153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:56,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:56,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:56,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686681374] [2021-08-21 12:01:56,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:56,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:56,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:56,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:56,675 INFO L87 Difference]: Start difference. First operand 3759 states and 9460 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) [2021-08-21 12:01:56,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:01:56,848 INFO L93 Difference]: Finished difference Result 4425 states and 10642 transitions. [2021-08-21 12:01:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:01:56,848 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 41 [2021-08-21 12:01:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:01:56,855 INFO L225 Difference]: With dead ends: 4425 [2021-08-21 12:01:56,855 INFO L226 Difference]: Without dead ends: 4407 [2021-08-21 12:01:56,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:01:56,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2021-08-21 12:01:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 3746. [2021-08-21 12:01:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3746 states, 3745 states have (on average 2.5124165554072095) internal successors, (9409), 3745 states have internal predecessors, (9409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:01:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 9409 transitions. [2021-08-21 12:01:56,911 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 9409 transitions. Word has length 41 [2021-08-21 12:01:56,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:01:56,911 INFO L470 AbstractCegarLoop]: Abstraction has 3746 states and 9409 transitions. [2021-08-21 12:01:56,911 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) [2021-08-21 12:01:56,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 9409 transitions. [2021-08-21 12:01:56,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:01:56,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:01:56,915 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:01:56,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 12:01:57,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:57,116 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:01:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:01:57,116 INFO L82 PathProgramCache]: Analyzing trace with hash 420533260, now seen corresponding path program 56 times [2021-08-21 12:01:57,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:01:57,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129567475] [2021-08-21 12:01:57,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:01:57,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:01:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:01:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:57,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:01:57,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129567475] [2021-08-21 12:01:57,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129567475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:57,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449635317] [2021-08-21 12:01:57,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:01:57,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:01:57,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:01:57,218 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) [2021-08-21 12:01:57,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 12:01:59,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:01:59,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:01:59,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:01:59,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:01:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:01:59,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449635317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:01:59,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:01:59,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:01:59,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525891186] [2021-08-21 12:01:59,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:01:59,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:01:59,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:01:59,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:01:59,959 INFO L87 Difference]: Start difference. First operand 3746 states and 9409 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) [2021-08-21 12:02:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:00,325 INFO L93 Difference]: Finished difference Result 5163 states and 12313 transitions. [2021-08-21 12:02:00,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:02:00,325 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 [2021-08-21 12:02:00,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:00,333 INFO L225 Difference]: With dead ends: 5163 [2021-08-21 12:02:00,334 INFO L226 Difference]: Without dead ends: 5121 [2021-08-21 12:02:00,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:02:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5121 states. [2021-08-21 12:02:00,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5121 to 3767. [2021-08-21 12:02:00,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 2.5132766861391396) internal successors, (9465), 3766 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:00,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 9465 transitions. [2021-08-21 12:02:00,398 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 9465 transitions. Word has length 41 [2021-08-21 12:02:00,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:00,398 INFO L470 AbstractCegarLoop]: Abstraction has 3767 states and 9465 transitions. [2021-08-21 12:02:00,398 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) [2021-08-21 12:02:00,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 9465 transitions. [2021-08-21 12:02:00,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:00,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:00,402 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:00,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-21 12:02:00,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:00,603 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:00,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:00,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1953092369, now seen corresponding path program 57 times [2021-08-21 12:02:00,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:00,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287797098] [2021-08-21 12:02:00,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:00,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:00,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:00,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287797098] [2021-08-21 12:02:00,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287797098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:00,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450218606] [2021-08-21 12:02:00,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:02:00,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:00,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:00,714 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) [2021-08-21 12:02:00,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 12:02:03,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:02:03,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:03,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:02:03,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:02:03,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450218606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:03,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:03,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:02:03,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412053474] [2021-08-21 12:02:03,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:02:03,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:03,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:02:03,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:02:03,514 INFO L87 Difference]: Start difference. First operand 3767 states and 9465 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) [2021-08-21 12:02:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:03,684 INFO L93 Difference]: Finished difference Result 4453 states and 10682 transitions. [2021-08-21 12:02:03,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:02:03,684 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 41 [2021-08-21 12:02:03,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:03,690 INFO L225 Difference]: With dead ends: 4453 [2021-08-21 12:02:03,691 INFO L226 Difference]: Without dead ends: 4429 [2021-08-21 12:02:03,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:03,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2021-08-21 12:02:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 3631. [2021-08-21 12:02:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 3630 states have (on average 2.4991735537190083) internal successors, (9072), 3630 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 9072 transitions. [2021-08-21 12:02:03,747 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 9072 transitions. Word has length 41 [2021-08-21 12:02:03,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:03,747 INFO L470 AbstractCegarLoop]: Abstraction has 3631 states and 9072 transitions. [2021-08-21 12:02:03,747 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) [2021-08-21 12:02:03,747 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 9072 transitions. [2021-08-21 12:02:03,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:03,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:03,752 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:03,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:03,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:03,953 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:03,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:03,953 INFO L82 PathProgramCache]: Analyzing trace with hash 575369794, now seen corresponding path program 58 times [2021-08-21 12:02:03,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:03,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518193893] [2021-08-21 12:02:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:03,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:04,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:04,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518193893] [2021-08-21 12:02:04,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518193893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:04,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444505793] [2021-08-21 12:02:04,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:02:04,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:04,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:04,077 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) [2021-08-21 12:02:04,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 12:02:06,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:02:06,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:06,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:02:06,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:06,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444505793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:06,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:06,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:02:06,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654781708] [2021-08-21 12:02:06,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:02:06,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:06,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:02:06,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:02:06,855 INFO L87 Difference]: Start difference. First operand 3631 states and 9072 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) [2021-08-21 12:02:07,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:07,255 INFO L93 Difference]: Finished difference Result 4939 states and 11659 transitions. [2021-08-21 12:02:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:02:07,256 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 [2021-08-21 12:02:07,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:07,263 INFO L225 Difference]: With dead ends: 4939 [2021-08-21 12:02:07,263 INFO L226 Difference]: Without dead ends: 4885 [2021-08-21 12:02:07,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:02:07,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4885 states. [2021-08-21 12:02:07,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4885 to 3618. [2021-08-21 12:02:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3618 states, 3617 states have (on average 2.493779375172795) internal successors, (9020), 3617 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3618 states to 3618 states and 9020 transitions. [2021-08-21 12:02:07,320 INFO L78 Accepts]: Start accepts. Automaton has 3618 states and 9020 transitions. Word has length 41 [2021-08-21 12:02:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:07,320 INFO L470 AbstractCegarLoop]: Abstraction has 3618 states and 9020 transitions. [2021-08-21 12:02:07,320 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) [2021-08-21 12:02:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3618 states and 9020 transitions. [2021-08-21 12:02:07,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:07,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:07,324 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:07,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:07,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:07,524 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:07,525 INFO L82 PathProgramCache]: Analyzing trace with hash -284572133, now seen corresponding path program 26 times [2021-08-21 12:02:07,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:07,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520701109] [2021-08-21 12:02:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:07,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:07,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:07,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520701109] [2021-08-21 12:02:07,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520701109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:07,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69540989] [2021-08-21 12:02:07,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:02:07,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:07,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:07,620 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) [2021-08-21 12:02:07,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 12:02:10,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:02:10,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:10,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:02:10,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:10,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69540989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:10,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:10,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:02:10,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277517199] [2021-08-21 12:02:10,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:02:10,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:10,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:02:10,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:02:10,445 INFO L87 Difference]: Start difference. First operand 3618 states and 9020 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) [2021-08-21 12:02:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:10,634 INFO L93 Difference]: Finished difference Result 5763 states and 13661 transitions. [2021-08-21 12:02:10,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:02:10,634 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 41 [2021-08-21 12:02:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:10,643 INFO L225 Difference]: With dead ends: 5763 [2021-08-21 12:02:10,643 INFO L226 Difference]: Without dead ends: 5763 [2021-08-21 12:02:10,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5763 states. [2021-08-21 12:02:10,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5763 to 3703. [2021-08-21 12:02:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3702 states have (on average 2.5062128579146408) internal successors, (9278), 3702 states have internal predecessors, (9278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 9278 transitions. [2021-08-21 12:02:10,706 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 9278 transitions. Word has length 41 [2021-08-21 12:02:10,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:10,706 INFO L470 AbstractCegarLoop]: Abstraction has 3703 states and 9278 transitions. [2021-08-21 12:02:10,706 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) [2021-08-21 12:02:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 9278 transitions. [2021-08-21 12:02:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:10,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:10,710 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:10,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-21 12:02:10,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:10,911 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:10,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:10,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1922144589, now seen corresponding path program 27 times [2021-08-21 12:02:10,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:10,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187707473] [2021-08-21 12:02:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:10,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:11,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:11,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187707473] [2021-08-21 12:02:11,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187707473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:11,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519485797] [2021-08-21 12:02:11,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:02:11,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:11,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:11,020 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) [2021-08-21 12:02:11,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 12:02:13,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 12:02:13,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:13,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:02:13,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:13,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519485797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:13,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:13,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:02:13,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99591116] [2021-08-21 12:02:13,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:02:13,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:13,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:02:13,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:02:13,870 INFO L87 Difference]: Start difference. First operand 3703 states and 9278 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) [2021-08-21 12:02:14,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:14,135 INFO L93 Difference]: Finished difference Result 5686 states and 13483 transitions. [2021-08-21 12:02:14,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:02:14,135 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 41 [2021-08-21 12:02:14,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:14,144 INFO L225 Difference]: With dead ends: 5686 [2021-08-21 12:02:14,144 INFO L226 Difference]: Without dead ends: 5686 [2021-08-21 12:02:14,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:02:14,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-08-21 12:02:14,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3719. [2021-08-21 12:02:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3719 states, 3718 states have (on average 2.5080688542227003) internal successors, (9325), 3718 states have internal predecessors, (9325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3719 states to 3719 states and 9325 transitions. [2021-08-21 12:02:14,212 INFO L78 Accepts]: Start accepts. Automaton has 3719 states and 9325 transitions. Word has length 41 [2021-08-21 12:02:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:14,212 INFO L470 AbstractCegarLoop]: Abstraction has 3719 states and 9325 transitions. [2021-08-21 12:02:14,212 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) [2021-08-21 12:02:14,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3719 states and 9325 transitions. [2021-08-21 12:02:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:14,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:14,216 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:14,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-21 12:02:14,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-21 12:02:14,417 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:14,417 INFO L82 PathProgramCache]: Analyzing trace with hash 682827543, now seen corresponding path program 28 times [2021-08-21 12:02:14,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:14,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814723902] [2021-08-21 12:02:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:14,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:14,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:14,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814723902] [2021-08-21 12:02:14,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814723902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:14,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888096853] [2021-08-21 12:02:14,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:02:14,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:14,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:14,543 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) [2021-08-21 12:02:14,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 12:02:17,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:02:17,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:17,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:02:17,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:17,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888096853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:17,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:17,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:02:17,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309684179] [2021-08-21 12:02:17,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:02:17,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:17,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:02:17,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:02:17,434 INFO L87 Difference]: Start difference. First operand 3719 states and 9325 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) [2021-08-21 12:02:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:17,683 INFO L93 Difference]: Finished difference Result 4882 states and 11625 transitions. [2021-08-21 12:02:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:02:17,684 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 41 [2021-08-21 12:02:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:17,691 INFO L225 Difference]: With dead ends: 4882 [2021-08-21 12:02:17,691 INFO L226 Difference]: Without dead ends: 4882 [2021-08-21 12:02:17,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=109, Invalid=197, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:02:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2021-08-21 12:02:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 3551. [2021-08-21 12:02:17,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.507887323943662) internal successors, (8903), 3550 states have internal predecessors, (8903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8903 transitions. [2021-08-21 12:02:17,748 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8903 transitions. Word has length 41 [2021-08-21 12:02:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:17,748 INFO L470 AbstractCegarLoop]: Abstraction has 3551 states and 8903 transitions. [2021-08-21 12:02:17,748 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) [2021-08-21 12:02:17,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8903 transitions. [2021-08-21 12:02:17,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:17,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:17,752 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:17,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-21 12:02:17,953 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,SelfDestructingSolverStorable145 [2021-08-21 12:02:17,953 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:17,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:17,953 INFO L82 PathProgramCache]: Analyzing trace with hash 961972471, now seen corresponding path program 59 times [2021-08-21 12:02:17,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:17,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319803474] [2021-08-21 12:02:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:17,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:18,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:18,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319803474] [2021-08-21 12:02:18,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319803474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:18,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87875312] [2021-08-21 12:02:18,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:02:18,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:18,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:18,075 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) [2021-08-21 12:02:18,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 12:02:20,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:02:20,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:20,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:02:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:20,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87875312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:20,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:20,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-08-21 12:02:20,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797104490] [2021-08-21 12:02:20,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:02:20,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:20,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:02:20,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:02:20,964 INFO L87 Difference]: Start difference. First operand 3551 states and 8903 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-08-21 12:02:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:21,225 INFO L93 Difference]: Finished difference Result 4193 states and 10086 transitions. [2021-08-21 12:02:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:02:21,226 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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 41 [2021-08-21 12:02:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:21,233 INFO L225 Difference]: With dead ends: 4193 [2021-08-21 12:02:21,234 INFO L226 Difference]: Without dead ends: 4166 [2021-08-21 12:02:21,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:02:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-08-21 12:02:21,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 3551. [2021-08-21 12:02:21,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.507042253521127) internal successors, (8900), 3550 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8900 transitions. [2021-08-21 12:02:21,293 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8900 transitions. Word has length 41 [2021-08-21 12:02:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:21,293 INFO L470 AbstractCegarLoop]: Abstraction has 3551 states and 8900 transitions. [2021-08-21 12:02:21,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-08-21 12:02:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8900 transitions. [2021-08-21 12:02:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:21,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:21,297 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:21,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:21,497 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,SelfDestructingSolverStorable146 [2021-08-21 12:02:21,497 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:21,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:21,498 INFO L82 PathProgramCache]: Analyzing trace with hash -427921325, now seen corresponding path program 60 times [2021-08-21 12:02:21,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:21,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881448662] [2021-08-21 12:02:21,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:21,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:21,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:21,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881448662] [2021-08-21 12:02:21,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881448662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:21,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680083923] [2021-08-21 12:02:21,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:02:21,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:21,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:21,597 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) [2021-08-21 12:02:21,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 12:02:24,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-21 12:02:24,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:24,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:02:24,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:02:24,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680083923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:24,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:24,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:02:24,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441706687] [2021-08-21 12:02:24,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:02:24,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:24,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:02:24,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:02:24,522 INFO L87 Difference]: Start difference. First operand 3551 states and 8900 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-08-21 12:02:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:24,670 INFO L93 Difference]: Finished difference Result 4381 states and 10397 transitions. [2021-08-21 12:02:24,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:02:24,670 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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 [2021-08-21 12:02:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:24,676 INFO L225 Difference]: With dead ends: 4381 [2021-08-21 12:02:24,676 INFO L226 Difference]: Without dead ends: 4363 [2021-08-21 12:02:24,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:02:24,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-08-21 12:02:24,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3551. [2021-08-21 12:02:24,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.5019718309859154) internal successors, (8882), 3550 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:24,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8882 transitions. [2021-08-21 12:02:24,732 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8882 transitions. Word has length 41 [2021-08-21 12:02:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:24,732 INFO L470 AbstractCegarLoop]: Abstraction has 3551 states and 8882 transitions. [2021-08-21 12:02:24,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 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) [2021-08-21 12:02:24,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8882 transitions. [2021-08-21 12:02:24,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:24,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:24,737 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:24,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-21 12:02:24,937 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,SelfDestructingSolverStorable147 [2021-08-21 12:02:24,937 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:24,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:24,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1875921338, now seen corresponding path program 61 times [2021-08-21 12:02:24,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:24,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773482788] [2021-08-21 12:02:24,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:24,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:25,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:25,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773482788] [2021-08-21 12:02:25,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773482788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:25,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536813586] [2021-08-21 12:02:25,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:25,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:25,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:25,052 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) [2021-08-21 12:02:25,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 12:02:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:27,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:02:27,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:27,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536813586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:27,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:27,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:02:27,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614144270] [2021-08-21 12:02:27,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:02:27,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:27,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:02:27,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:02:27,978 INFO L87 Difference]: Start difference. First operand 3551 states and 8882 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) [2021-08-21 12:02:28,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:28,343 INFO L93 Difference]: Finished difference Result 4355 states and 10366 transitions. [2021-08-21 12:02:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:02:28,344 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 [2021-08-21 12:02:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:28,350 INFO L225 Difference]: With dead ends: 4355 [2021-08-21 12:02:28,350 INFO L226 Difference]: Without dead ends: 4156 [2021-08-21 12:02:28,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:02:28,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2021-08-21 12:02:28,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 3529. [2021-08-21 12:02:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3529 states, 3528 states have (on average 2.484126984126984) internal successors, (8764), 3528 states have internal predecessors, (8764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 8764 transitions. [2021-08-21 12:02:28,402 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 8764 transitions. Word has length 41 [2021-08-21 12:02:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:28,402 INFO L470 AbstractCegarLoop]: Abstraction has 3529 states and 8764 transitions. [2021-08-21 12:02:28,402 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) [2021-08-21 12:02:28,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 8764 transitions. [2021-08-21 12:02:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:28,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:28,407 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:28,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-08-21 12:02:28,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:28,609 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:28,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:28,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1805509778, now seen corresponding path program 62 times [2021-08-21 12:02:28,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:28,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074100662] [2021-08-21 12:02:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:28,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:02:28,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:28,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074100662] [2021-08-21 12:02:28,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074100662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:28,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206643732] [2021-08-21 12:02:28,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:02:28,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:28,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:28,717 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) [2021-08-21 12:02:28,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 12:02:31,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:02:31,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:31,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:02:31,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:02:31,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206643732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:31,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:31,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:02:31,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556041415] [2021-08-21 12:02:31,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:02:31,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:31,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:02:31,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:02:31,641 INFO L87 Difference]: Start difference. First operand 3529 states and 8764 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) [2021-08-21 12:02:31,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:31,901 INFO L93 Difference]: Finished difference Result 4389 states and 10491 transitions. [2021-08-21 12:02:31,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:02:31,901 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 [2021-08-21 12:02:31,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:31,907 INFO L225 Difference]: With dead ends: 4389 [2021-08-21 12:02:31,908 INFO L226 Difference]: Without dead ends: 4377 [2021-08-21 12:02:31,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:02:31,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2021-08-21 12:02:31,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 3601. [2021-08-21 12:02:31,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 3600 states have (on average 2.4819444444444443) internal successors, (8935), 3600 states have internal predecessors, (8935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:31,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 8935 transitions. [2021-08-21 12:02:31,959 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 8935 transitions. Word has length 41 [2021-08-21 12:02:31,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:31,960 INFO L470 AbstractCegarLoop]: Abstraction has 3601 states and 8935 transitions. [2021-08-21 12:02:31,960 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) [2021-08-21 12:02:31,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 8935 transitions. [2021-08-21 12:02:31,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:31,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:31,963 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:31,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:32,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:32,164 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:32,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:32,164 INFO L82 PathProgramCache]: Analyzing trace with hash -347540184, now seen corresponding path program 63 times [2021-08-21 12:02:32,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:32,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476547807] [2021-08-21 12:02:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:32,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:32,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:32,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476547807] [2021-08-21 12:02:32,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476547807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:32,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948117201] [2021-08-21 12:02:32,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:02:32,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:32,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:32,265 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) [2021-08-21 12:02:32,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 12:02:35,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 12:02:35,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:35,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:02:35,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:35,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948117201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:35,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:35,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:02:35,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75353988] [2021-08-21 12:02:35,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:02:35,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:35,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:02:35,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:02:35,218 INFO L87 Difference]: Start difference. First operand 3601 states and 8935 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) [2021-08-21 12:02:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:35,606 INFO L93 Difference]: Finished difference Result 5587 states and 13170 transitions. [2021-08-21 12:02:35,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:02:35,606 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 [2021-08-21 12:02:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:35,615 INFO L225 Difference]: With dead ends: 5587 [2021-08-21 12:02:35,615 INFO L226 Difference]: Without dead ends: 5533 [2021-08-21 12:02:35,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:02:35,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2021-08-21 12:02:35,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 3793. [2021-08-21 12:02:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 2.4897151898734178) internal successors, (9441), 3792 states have internal predecessors, (9441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9441 transitions. [2021-08-21 12:02:35,681 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9441 transitions. Word has length 41 [2021-08-21 12:02:35,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:35,681 INFO L470 AbstractCegarLoop]: Abstraction has 3793 states and 9441 transitions. [2021-08-21 12:02:35,681 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) [2021-08-21 12:02:35,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9441 transitions. [2021-08-21 12:02:35,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:35,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:35,685 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:35,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-21 12:02:35,885 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,SelfDestructingSolverStorable150 [2021-08-21 12:02:35,886 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:35,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:35,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1185018925, now seen corresponding path program 64 times [2021-08-21 12:02:35,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:35,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757891365] [2021-08-21 12:02:35,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:35,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:35,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:35,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757891365] [2021-08-21 12:02:35,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757891365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:35,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651737976] [2021-08-21 12:02:35,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:02:35,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:35,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:35,994 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) [2021-08-21 12:02:35,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 12:02:38,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:02:38,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:38,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:02:38,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:02:39,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651737976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:39,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:39,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:02:39,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465346229] [2021-08-21 12:02:39,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:02:39,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:39,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:02:39,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:02:39,074 INFO L87 Difference]: Start difference. First operand 3793 states and 9441 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) [2021-08-21 12:02:39,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:39,226 INFO L93 Difference]: Finished difference Result 4607 states and 10909 transitions. [2021-08-21 12:02:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:02:39,227 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 41 [2021-08-21 12:02:39,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:39,233 INFO L225 Difference]: With dead ends: 4607 [2021-08-21 12:02:39,233 INFO L226 Difference]: Without dead ends: 4583 [2021-08-21 12:02:39,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:39,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2021-08-21 12:02:39,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 3793. [2021-08-21 12:02:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 2.485495780590717) internal successors, (9425), 3792 states have internal predecessors, (9425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9425 transitions. [2021-08-21 12:02:39,289 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9425 transitions. Word has length 41 [2021-08-21 12:02:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:39,289 INFO L470 AbstractCegarLoop]: Abstraction has 3793 states and 9425 transitions. [2021-08-21 12:02:39,289 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) [2021-08-21 12:02:39,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9425 transitions. [2021-08-21 12:02:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:39,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:39,294 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:39,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-08-21 12:02:39,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:39,495 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:39,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:39,495 INFO L82 PathProgramCache]: Analyzing trace with hash -192703650, now seen corresponding path program 65 times [2021-08-21 12:02:39,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:39,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341094164] [2021-08-21 12:02:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:39,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:39,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:39,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341094164] [2021-08-21 12:02:39,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341094164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:39,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299159850] [2021-08-21 12:02:39,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:02:39,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:39,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:39,603 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) [2021-08-21 12:02:39,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 12:02:42,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 12:02:42,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:42,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:02:42,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:02:42,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299159850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:42,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:42,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:02:42,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304563851] [2021-08-21 12:02:42,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:02:42,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:42,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:02:42,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:02:42,624 INFO L87 Difference]: Start difference. First operand 3793 states and 9425 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) [2021-08-21 12:02:43,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:43,219 INFO L93 Difference]: Finished difference Result 7022 states and 16378 transitions. [2021-08-21 12:02:43,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:02:43,219 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 [2021-08-21 12:02:43,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:43,231 INFO L225 Difference]: With dead ends: 7022 [2021-08-21 12:02:43,231 INFO L226 Difference]: Without dead ends: 6908 [2021-08-21 12:02:43,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:02:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6908 states. [2021-08-21 12:02:43,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6908 to 3954. [2021-08-21 12:02:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3954 states, 3953 states have (on average 2.489501644320769) internal successors, (9841), 3953 states have internal predecessors, (9841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 9841 transitions. [2021-08-21 12:02:43,308 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 9841 transitions. Word has length 41 [2021-08-21 12:02:43,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:43,309 INFO L470 AbstractCegarLoop]: Abstraction has 3954 states and 9841 transitions. [2021-08-21 12:02:43,309 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) [2021-08-21 12:02:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 9841 transitions. [2021-08-21 12:02:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:43,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:43,313 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:43,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-08-21 12:02:43,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:43,513 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:43,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:43,514 INFO L82 PathProgramCache]: Analyzing trace with hash 193899027, now seen corresponding path program 66 times [2021-08-21 12:02:43,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:43,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364165651] [2021-08-21 12:02:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:43,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:43,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:43,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364165651] [2021-08-21 12:02:43,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364165651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:43,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937787655] [2021-08-21 12:02:43,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:02:43,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:43,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:43,637 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) [2021-08-21 12:02:43,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-21 12:02:46,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:02:46,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:46,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:02:46,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:02:46,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937787655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:46,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:46,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:02:46,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973104414] [2021-08-21 12:02:46,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:02:46,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:46,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:02:46,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:02:46,708 INFO L87 Difference]: Start difference. First operand 3954 states and 9841 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) [2021-08-21 12:02:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:46,880 INFO L93 Difference]: Finished difference Result 4805 states and 11375 transitions. [2021-08-21 12:02:46,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:02:46,880 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 41 [2021-08-21 12:02:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:46,888 INFO L225 Difference]: With dead ends: 4805 [2021-08-21 12:02:46,888 INFO L226 Difference]: Without dead ends: 4772 [2021-08-21 12:02:46,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:02:46,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-08-21 12:02:46,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 3796. [2021-08-21 12:02:46,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 2.477470355731225) internal successors, (9402), 3795 states have internal predecessors, (9402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 9402 transitions. [2021-08-21 12:02:46,945 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 9402 transitions. Word has length 41 [2021-08-21 12:02:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:46,945 INFO L470 AbstractCegarLoop]: Abstraction has 3796 states and 9402 transitions. [2021-08-21 12:02:46,945 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) [2021-08-21 12:02:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 9402 transitions. [2021-08-21 12:02:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:46,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:46,949 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:46,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:47,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:47,150 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:47,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:47,150 INFO L82 PathProgramCache]: Analyzing trace with hash -252395160, now seen corresponding path program 67 times [2021-08-21 12:02:47,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:47,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20346594] [2021-08-21 12:02:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:47,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:47,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:47,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20346594] [2021-08-21 12:02:47,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20346594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:47,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454292718] [2021-08-21 12:02:47,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:47,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:47,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:47,274 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) [2021-08-21 12:02:47,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-21 12:02:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:50,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:02:50,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:50,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454292718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:50,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:50,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:02:50,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240320770] [2021-08-21 12:02:50,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:02:50,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:50,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:02:50,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:02:50,332 INFO L87 Difference]: Start difference. First operand 3796 states and 9402 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) [2021-08-21 12:02:50,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:50,742 INFO L93 Difference]: Finished difference Result 5143 states and 11987 transitions. [2021-08-21 12:02:50,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:02:50,742 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 41 [2021-08-21 12:02:50,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:50,750 INFO L225 Difference]: With dead ends: 5143 [2021-08-21 12:02:50,750 INFO L226 Difference]: Without dead ends: 4987 [2021-08-21 12:02:50,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:02:50,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-08-21 12:02:50,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 3332. [2021-08-21 12:02:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 2.4377063944761335) internal successors, (8120), 3331 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 8120 transitions. [2021-08-21 12:02:50,806 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 8120 transitions. Word has length 41 [2021-08-21 12:02:50,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:50,806 INFO L470 AbstractCegarLoop]: Abstraction has 3332 states and 8120 transitions. [2021-08-21 12:02:50,806 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) [2021-08-21 12:02:50,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 8120 transitions. [2021-08-21 12:02:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:50,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:50,810 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:50,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:51,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:51,010 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:51,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:51,010 INFO L82 PathProgramCache]: Analyzing trace with hash -490456677, now seen corresponding path program 29 times [2021-08-21 12:02:51,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:51,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25179835] [2021-08-21 12:02:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:51,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:51,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:51,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25179835] [2021-08-21 12:02:51,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25179835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:51,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198052379] [2021-08-21 12:02:51,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:02:51,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:51,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:51,108 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) [2021-08-21 12:02:51,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-21 12:02:54,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 12:02:54,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:54,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:02:54,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 54 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:02:54,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198052379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:54,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:54,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2021-08-21 12:02:54,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295484690] [2021-08-21 12:02:54,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:02:54,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:54,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:02:54,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:02:54,222 INFO L87 Difference]: Start difference. First operand 3332 states and 8120 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-08-21 12:02:54,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:54,416 INFO L93 Difference]: Finished difference Result 4368 states and 10283 transitions. [2021-08-21 12:02:54,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:02:54,416 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 41 [2021-08-21 12:02:54,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:54,423 INFO L225 Difference]: With dead ends: 4368 [2021-08-21 12:02:54,423 INFO L226 Difference]: Without dead ends: 4354 [2021-08-21 12:02:54,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:02:54,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2021-08-21 12:02:54,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 3443. [2021-08-21 12:02:54,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3442 states have (on average 2.4468332364904124) internal successors, (8422), 3442 states have internal predecessors, (8422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:54,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 8422 transitions. [2021-08-21 12:02:54,476 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 8422 transitions. Word has length 41 [2021-08-21 12:02:54,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:54,476 INFO L470 AbstractCegarLoop]: Abstraction has 3443 states and 8422 transitions. [2021-08-21 12:02:54,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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) [2021-08-21 12:02:54,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 8422 transitions. [2021-08-21 12:02:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:54,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:54,479 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:54,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-08-21 12:02:54,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-21 12:02:54,680 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:54,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:54,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1112337087, now seen corresponding path program 30 times [2021-08-21 12:02:54,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:54,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775854776] [2021-08-21 12:02:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:54,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:54,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:54,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775854776] [2021-08-21 12:02:54,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775854776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:54,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602178084] [2021-08-21 12:02:54,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:02:54,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:54,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:54,783 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) [2021-08-21 12:02:54,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 12:02:57,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 12:02:57,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:02:57,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:02:57,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:02:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 54 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:57,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602178084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:57,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:02:57,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:02:57,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263129822] [2021-08-21 12:02:57,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:02:57,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:02:57,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:02:57,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:02:57,897 INFO L87 Difference]: Start difference. First operand 3443 states and 8422 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) [2021-08-21 12:02:58,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:02:58,113 INFO L93 Difference]: Finished difference Result 5141 states and 11974 transitions. [2021-08-21 12:02:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:02:58,113 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 41 [2021-08-21 12:02:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:02:58,120 INFO L225 Difference]: With dead ends: 5141 [2021-08-21 12:02:58,120 INFO L226 Difference]: Without dead ends: 5141 [2021-08-21 12:02:58,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:02:58,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5141 states. [2021-08-21 12:02:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5141 to 3446. [2021-08-21 12:02:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 3445 states have (on average 2.4473149492017416) internal successors, (8431), 3445 states have internal predecessors, (8431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:02:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 8431 transitions. [2021-08-21 12:02:58,177 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 8431 transitions. Word has length 41 [2021-08-21 12:02:58,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:02:58,177 INFO L470 AbstractCegarLoop]: Abstraction has 3446 states and 8431 transitions. [2021-08-21 12:02:58,177 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) [2021-08-21 12:02:58,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 8431 transitions. [2021-08-21 12:02:58,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:02:58,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:02:58,180 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:02:58,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-21 12:02:58,380 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,SelfDestructingSolverStorable156 [2021-08-21 12:02:58,381 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:02:58,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:02:58,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1545057753, now seen corresponding path program 31 times [2021-08-21 12:02:58,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:02:58,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822099035] [2021-08-21 12:02:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:02:58,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:02:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:02:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:02:58,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:02:58,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822099035] [2021-08-21 12:02:58,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822099035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:02:58,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284263365] [2021-08-21 12:02:58,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:02:58,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:02:58,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:02:58,530 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) [2021-08-21 12:02:58,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 12:03:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:01,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:03:01,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 54 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:01,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284263365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:01,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:01,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:03:01,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470484084] [2021-08-21 12:03:01,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:03:01,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:01,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:03:01,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:03:01,664 INFO L87 Difference]: Start difference. First operand 3446 states and 8431 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) [2021-08-21 12:03:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:01,947 INFO L93 Difference]: Finished difference Result 5411 states and 12589 transitions. [2021-08-21 12:03:01,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:03:01,947 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 41 [2021-08-21 12:03:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:01,955 INFO L225 Difference]: With dead ends: 5411 [2021-08-21 12:03:01,956 INFO L226 Difference]: Without dead ends: 5411 [2021-08-21 12:03:01,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:03:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2021-08-21 12:03:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 3457. [2021-08-21 12:03:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3457 states, 3456 states have (on average 2.4496527777777777) internal successors, (8466), 3456 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3457 states to 3457 states and 8466 transitions. [2021-08-21 12:03:02,014 INFO L78 Accepts]: Start accepts. Automaton has 3457 states and 8466 transitions. Word has length 41 [2021-08-21 12:03:02,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:02,015 INFO L470 AbstractCegarLoop]: Abstraction has 3457 states and 8466 transitions. [2021-08-21 12:03:02,015 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) [2021-08-21 12:03:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3457 states and 8466 transitions. [2021-08-21 12:03:02,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:03:02,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:02,018 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:02,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:02,218 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,SelfDestructingSolverStorable157 [2021-08-21 12:03:02,219 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:02,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:02,219 INFO L82 PathProgramCache]: Analyzing trace with hash -144937411, now seen corresponding path program 32 times [2021-08-21 12:03:02,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:02,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217020796] [2021-08-21 12:03:02,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:02,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:02,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:02,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217020796] [2021-08-21 12:03:02,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217020796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:02,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664549208] [2021-08-21 12:03:02,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:03:02,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:02,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:02,342 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) [2021-08-21 12:03:02,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 12:03:05,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:03:05,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:05,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:03:05,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:05,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664549208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:05,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:05,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:03:05,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499416364] [2021-08-21 12:03:05,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:03:05,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:05,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:03:05,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:03:05,526 INFO L87 Difference]: Start difference. First operand 3457 states and 8466 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) [2021-08-21 12:03:05,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:05,842 INFO L93 Difference]: Finished difference Result 5035 states and 11767 transitions. [2021-08-21 12:03:05,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:03:05,843 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 41 [2021-08-21 12:03:05,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:05,850 INFO L225 Difference]: With dead ends: 5035 [2021-08-21 12:03:05,850 INFO L226 Difference]: Without dead ends: 5035 [2021-08-21 12:03:05,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:03:05,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5035 states. [2021-08-21 12:03:05,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5035 to 3471. [2021-08-21 12:03:05,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3471 states, 3470 states have (on average 2.452449567723343) internal successors, (8510), 3470 states have internal predecessors, (8510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3471 states to 3471 states and 8510 transitions. [2021-08-21 12:03:05,906 INFO L78 Accepts]: Start accepts. Automaton has 3471 states and 8510 transitions. Word has length 41 [2021-08-21 12:03:05,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:05,906 INFO L470 AbstractCegarLoop]: Abstraction has 3471 states and 8510 transitions. [2021-08-21 12:03:05,906 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) [2021-08-21 12:03:05,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3471 states and 8510 transitions. [2021-08-21 12:03:05,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:03:05,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:05,909 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:05,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:06,110 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,SelfDestructingSolverStorable158 [2021-08-21 12:03:06,110 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:06,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:06,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1184224423, now seen corresponding path program 33 times [2021-08-21 12:03:06,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:06,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327107256] [2021-08-21 12:03:06,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:06,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:06,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:06,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327107256] [2021-08-21 12:03:06,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327107256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:06,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898423902] [2021-08-21 12:03:06,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:03:06,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:06,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:06,283 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) [2021-08-21 12:03:06,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 12:03:09,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 12:03:09,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:09,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:03:09,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:09,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898423902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:09,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:09,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:03:09,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625326961] [2021-08-21 12:03:09,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:03:09,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:09,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:03:09,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:03:09,515 INFO L87 Difference]: Start difference. First operand 3471 states and 8510 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) [2021-08-21 12:03:09,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:09,818 INFO L93 Difference]: Finished difference Result 4408 states and 10365 transitions. [2021-08-21 12:03:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:03:09,818 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 41 [2021-08-21 12:03:09,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:09,824 INFO L225 Difference]: With dead ends: 4408 [2021-08-21 12:03:09,824 INFO L226 Difference]: Without dead ends: 4408 [2021-08-21 12:03:09,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:03:09,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2021-08-21 12:03:09,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 3179. [2021-08-21 12:03:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 2.4389553178099432) internal successors, (7751), 3178 states have internal predecessors, (7751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 7751 transitions. [2021-08-21 12:03:09,873 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 7751 transitions. Word has length 41 [2021-08-21 12:03:09,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:09,873 INFO L470 AbstractCegarLoop]: Abstraction has 3179 states and 7751 transitions. [2021-08-21 12:03:09,873 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) [2021-08-21 12:03:09,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 7751 transitions. [2021-08-21 12:03:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:03:09,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:09,876 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:09,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-08-21 12:03:10,077 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,SelfDestructingSolverStorable159 [2021-08-21 12:03:10,077 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:10,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:10,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1641177709, now seen corresponding path program 68 times [2021-08-21 12:03:10,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:10,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561457620] [2021-08-21 12:03:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:10,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:10,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:10,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561457620] [2021-08-21 12:03:10,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561457620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:10,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771764745] [2021-08-21 12:03:10,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:03:10,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:10,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:10,210 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) [2021-08-21 12:03:10,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 12:03:13,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:03:13,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:13,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:03:13,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:03:13,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771764745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:13,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:13,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:03:13,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853122133] [2021-08-21 12:03:13,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:03:13,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:03:13,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:03:13,471 INFO L87 Difference]: Start difference. First operand 3179 states and 7751 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) [2021-08-21 12:03:13,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:13,673 INFO L93 Difference]: Finished difference Result 3775 states and 8829 transitions. [2021-08-21 12:03:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:03:13,673 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 41 [2021-08-21 12:03:13,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:13,679 INFO L225 Difference]: With dead ends: 3775 [2021-08-21 12:03:13,679 INFO L226 Difference]: Without dead ends: 3739 [2021-08-21 12:03:13,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:03:13,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-08-21 12:03:13,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3188. [2021-08-21 12:03:13,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3187 states have (on average 2.4339504235958582) internal successors, (7757), 3187 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:13,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 7757 transitions. [2021-08-21 12:03:13,727 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 7757 transitions. Word has length 41 [2021-08-21 12:03:13,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:13,727 INFO L470 AbstractCegarLoop]: Abstraction has 3188 states and 7757 transitions. [2021-08-21 12:03:13,727 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) [2021-08-21 12:03:13,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 7757 transitions. [2021-08-21 12:03:13,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:03:13,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:13,730 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:13,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-08-21 12:03:13,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:13,931 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:13,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:13,931 INFO L82 PathProgramCache]: Analyzing trace with hash 187740437, now seen corresponding path program 69 times [2021-08-21 12:03:13,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:13,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107075279] [2021-08-21 12:03:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:13,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:14,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:14,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107075279] [2021-08-21 12:03:14,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107075279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:14,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068080590] [2021-08-21 12:03:14,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:03:14,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:14,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:14,073 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) [2021-08-21 12:03:14,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 12:03:17,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:03:17,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:17,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:03:17,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:17,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068080590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:17,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:17,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:03:17,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297523617] [2021-08-21 12:03:17,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:03:17,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:17,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:03:17,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:03:17,398 INFO L87 Difference]: Start difference. First operand 3188 states and 7757 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) [2021-08-21 12:03:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:17,683 INFO L93 Difference]: Finished difference Result 4138 states and 9762 transitions. [2021-08-21 12:03:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:03:17,683 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 41 [2021-08-21 12:03:17,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:17,689 INFO L225 Difference]: With dead ends: 4138 [2021-08-21 12:03:17,689 INFO L226 Difference]: Without dead ends: 4138 [2021-08-21 12:03:17,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:03:17,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-08-21 12:03:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 3170. [2021-08-21 12:03:17,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 3169 states have (on average 2.454717576522562) internal successors, (7779), 3169 states have internal predecessors, (7779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 7779 transitions. [2021-08-21 12:03:17,738 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 7779 transitions. Word has length 41 [2021-08-21 12:03:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:17,739 INFO L470 AbstractCegarLoop]: Abstraction has 3170 states and 7779 transitions. [2021-08-21 12:03:17,739 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) [2021-08-21 12:03:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 7779 transitions. [2021-08-21 12:03:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:03:17,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:17,742 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:17,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-08-21 12:03:17,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:17,942 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:17,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:17,943 INFO L82 PathProgramCache]: Analyzing trace with hash 880111234, now seen corresponding path program 34 times [2021-08-21 12:03:17,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:17,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017848429] [2021-08-21 12:03:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:17,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:18,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:18,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017848429] [2021-08-21 12:03:18,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017848429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:18,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045862984] [2021-08-21 12:03:18,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:03:18,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:18,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:18,074 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) [2021-08-21 12:03:18,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 12:03:21,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:03:21,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:21,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:03:21,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:21,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045862984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:21,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:21,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:03:21,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907195826] [2021-08-21 12:03:21,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:03:21,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:21,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:03:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:03:21,281 INFO L87 Difference]: Start difference. First operand 3170 states and 7779 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) [2021-08-21 12:03:21,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:21,689 INFO L93 Difference]: Finished difference Result 4257 states and 9988 transitions. [2021-08-21 12:03:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:03:21,690 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 [2021-08-21 12:03:21,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:21,695 INFO L225 Difference]: With dead ends: 4257 [2021-08-21 12:03:21,695 INFO L226 Difference]: Without dead ends: 4227 [2021-08-21 12:03:21,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:03:21,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2021-08-21 12:03:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 3157. [2021-08-21 12:03:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 2.459442332065906) internal successors, (7762), 3156 states have internal predecessors, (7762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7762 transitions. [2021-08-21 12:03:21,743 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7762 transitions. Word has length 41 [2021-08-21 12:03:21,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:21,743 INFO L470 AbstractCegarLoop]: Abstraction has 3157 states and 7762 transitions. [2021-08-21 12:03:21,743 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) [2021-08-21 12:03:21,743 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7762 transitions. [2021-08-21 12:03:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:03:21,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:21,747 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:21,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-21 12:03:21,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:21,947 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:21,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:21,947 INFO L82 PathProgramCache]: Analyzing trace with hash 718059138, now seen corresponding path program 70 times [2021-08-21 12:03:21,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:21,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929370069] [2021-08-21 12:03:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:21,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:22,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:22,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929370069] [2021-08-21 12:03:22,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929370069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:22,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782795596] [2021-08-21 12:03:22,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:03:22,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:22,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:22,100 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) [2021-08-21 12:03:22,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-21 12:03:25,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:03:25,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:25,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:03:25,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:25,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782795596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:25,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:25,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 12:03:25,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903929101] [2021-08-21 12:03:25,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:03:25,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:25,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:03:25,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:03:25,539 INFO L87 Difference]: Start difference. First operand 3157 states and 7762 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) [2021-08-21 12:03:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:25,879 INFO L93 Difference]: Finished difference Result 3218 states and 7858 transitions. [2021-08-21 12:03:25,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:03:25,879 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 41 [2021-08-21 12:03:25,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:25,884 INFO L225 Difference]: With dead ends: 3218 [2021-08-21 12:03:25,884 INFO L226 Difference]: Without dead ends: 3174 [2021-08-21 12:03:25,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:03:25,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-08-21 12:03:25,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 3157. [2021-08-21 12:03:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 2.45659062103929) internal successors, (7753), 3156 states have internal predecessors, (7753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7753 transitions. [2021-08-21 12:03:25,925 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7753 transitions. Word has length 41 [2021-08-21 12:03:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:25,925 INFO L470 AbstractCegarLoop]: Abstraction has 3157 states and 7753 transitions. [2021-08-21 12:03:25,926 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) [2021-08-21 12:03:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7753 transitions. [2021-08-21 12:03:25,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:03:25,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:25,929 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:25,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:26,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:26,129 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:26,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:26,130 INFO L82 PathProgramCache]: Analyzing trace with hash -697252105, now seen corresponding path program 71 times [2021-08-21 12:03:26,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:26,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816685380] [2021-08-21 12:03:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:26,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:26,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:26,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816685380] [2021-08-21 12:03:26,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816685380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:26,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581439148] [2021-08-21 12:03:26,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:03:26,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:26,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:26,250 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) [2021-08-21 12:03:26,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-21 12:03:29,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:03:29,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:29,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:03:29,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:29,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581439148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:29,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:29,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 13 [2021-08-21 12:03:29,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366468412] [2021-08-21 12:03:29,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:03:29,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:29,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:03:29,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:03:29,650 INFO L87 Difference]: Start difference. First operand 3157 states and 7753 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 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) [2021-08-21 12:03:29,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:29,917 INFO L93 Difference]: Finished difference Result 4264 states and 10096 transitions. [2021-08-21 12:03:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:03:29,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 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 41 [2021-08-21 12:03:29,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:29,924 INFO L225 Difference]: With dead ends: 4264 [2021-08-21 12:03:29,924 INFO L226 Difference]: Without dead ends: 4264 [2021-08-21 12:03:29,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:03:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-08-21 12:03:29,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3336. [2021-08-21 12:03:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 2.489055472263868) internal successors, (8301), 3335 states have internal predecessors, (8301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:29,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 8301 transitions. [2021-08-21 12:03:29,974 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 8301 transitions. Word has length 41 [2021-08-21 12:03:29,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:29,974 INFO L470 AbstractCegarLoop]: Abstraction has 3336 states and 8301 transitions. [2021-08-21 12:03:29,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 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) [2021-08-21 12:03:29,974 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 8301 transitions. [2021-08-21 12:03:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:03:29,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:29,977 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:30,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-08-21 12:03:30,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:30,178 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:30,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:30,178 INFO L82 PathProgramCache]: Analyzing trace with hash 856335594, now seen corresponding path program 35 times [2021-08-21 12:03:30,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:30,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668485994] [2021-08-21 12:03:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:30,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:30,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:30,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668485994] [2021-08-21 12:03:30,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668485994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:30,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602180005] [2021-08-21 12:03:30,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:03:30,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:30,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:30,294 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) [2021-08-21 12:03:30,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-21 12:03:33,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:03:33,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:33,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:03:33,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:33,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602180005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:33,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:33,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:03:33,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107247832] [2021-08-21 12:03:33,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:03:33,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:33,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:03:33,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:03:33,664 INFO L87 Difference]: Start difference. First operand 3336 states and 8301 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) [2021-08-21 12:03:33,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:33,985 INFO L93 Difference]: Finished difference Result 4243 states and 10191 transitions. [2021-08-21 12:03:33,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:03:33,985 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 [2021-08-21 12:03:33,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:33,991 INFO L225 Difference]: With dead ends: 4243 [2021-08-21 12:03:33,992 INFO L226 Difference]: Without dead ends: 4243 [2021-08-21 12:03:33,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:03:33,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2021-08-21 12:03:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 3327. [2021-08-21 12:03:34,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.495189416716777) internal successors, (8299), 3326 states have internal predecessors, (8299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8299 transitions. [2021-08-21 12:03:34,042 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8299 transitions. Word has length 41 [2021-08-21 12:03:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:34,042 INFO L470 AbstractCegarLoop]: Abstraction has 3327 states and 8299 transitions. [2021-08-21 12:03:34,042 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) [2021-08-21 12:03:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8299 transitions. [2021-08-21 12:03:34,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:03:34,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:34,045 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:34,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2021-08-21 12:03:34,245 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,SelfDestructingSolverStorable165 [2021-08-21 12:03:34,246 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:34,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:34,246 INFO L82 PathProgramCache]: Analyzing trace with hash 679444650, now seen corresponding path program 72 times [2021-08-21 12:03:34,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:34,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453126531] [2021-08-21 12:03:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:34,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:34,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:34,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453126531] [2021-08-21 12:03:34,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453126531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:34,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238679015] [2021-08-21 12:03:34,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:03:34,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:34,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:34,376 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) [2021-08-21 12:03:34,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-21 12:03:37,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:03:37,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:37,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:03:37,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:38,042 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-21 12:03:38,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-08-21 12:03:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 47 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:38,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238679015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:38,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:38,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2021-08-21 12:03:38,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533551599] [2021-08-21 12:03:38,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:03:38,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:38,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:03:38,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:03:38,128 INFO L87 Difference]: Start difference. First operand 3327 states and 8299 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 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) [2021-08-21 12:03:38,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:38,659 INFO L93 Difference]: Finished difference Result 3905 states and 9346 transitions. [2021-08-21 12:03:38,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:03:38,660 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 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 41 [2021-08-21 12:03:38,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:38,666 INFO L225 Difference]: With dead ends: 3905 [2021-08-21 12:03:38,666 INFO L226 Difference]: Without dead ends: 3873 [2021-08-21 12:03:38,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 354.0ms TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:03:38,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3873 states. [2021-08-21 12:03:38,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3873 to 3225. [2021-08-21 12:03:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3224 states have (on average 2.5189205955334986) internal successors, (8121), 3224 states have internal predecessors, (8121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:38,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 8121 transitions. [2021-08-21 12:03:38,716 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 8121 transitions. Word has length 41 [2021-08-21 12:03:38,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:38,716 INFO L470 AbstractCegarLoop]: Abstraction has 3225 states and 8121 transitions. [2021-08-21 12:03:38,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 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) [2021-08-21 12:03:38,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 8121 transitions. [2021-08-21 12:03:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:03:38,719 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:38,719 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:38,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-08-21 12:03:38,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:38,921 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:38,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1371815447, now seen corresponding path program 36 times [2021-08-21 12:03:38,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:38,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704913549] [2021-08-21 12:03:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:38,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:39,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:39,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704913549] [2021-08-21 12:03:39,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704913549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:39,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580203546] [2021-08-21 12:03:39,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:03:39,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:39,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:39,041 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) [2021-08-21 12:03:39,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-21 12:03:42,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:03:42,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:42,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:03:42,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:42,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580203546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:42,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:42,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-08-21 12:03:42,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048325078] [2021-08-21 12:03:42,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:03:42,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:42,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:03:42,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:03:42,532 INFO L87 Difference]: Start difference. First operand 3225 states and 8121 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) [2021-08-21 12:03:42,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:42,741 INFO L93 Difference]: Finished difference Result 3893 states and 9457 transitions. [2021-08-21 12:03:42,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:03:42,741 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 41 [2021-08-21 12:03:42,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:42,747 INFO L225 Difference]: With dead ends: 3893 [2021-08-21 12:03:42,747 INFO L226 Difference]: Without dead ends: 3865 [2021-08-21 12:03:42,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:03:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3865 states. [2021-08-21 12:03:42,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3865 to 3123. [2021-08-21 12:03:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 2.534593209481102) internal successors, (7913), 3122 states have internal predecessors, (7913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:42,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 7913 transitions. [2021-08-21 12:03:42,793 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 7913 transitions. Word has length 41 [2021-08-21 12:03:42,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:42,793 INFO L470 AbstractCegarLoop]: Abstraction has 3123 states and 7913 transitions. [2021-08-21 12:03:42,793 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) [2021-08-21 12:03:42,793 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 7913 transitions. [2021-08-21 12:03:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:03:42,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:42,796 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:42,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:42,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:42,996 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:42,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:42,997 INFO L82 PathProgramCache]: Analyzing trace with hash -875475883, now seen corresponding path program 73 times [2021-08-21 12:03:42,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:42,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242761453] [2021-08-21 12:03:42,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:42,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:43,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:43,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242761453] [2021-08-21 12:03:43,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242761453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:43,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881211998] [2021-08-21 12:03:43,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:03:43,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:43,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:43,106 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) [2021-08-21 12:03:43,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-21 12:03:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:46,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:03:46,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:46,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881211998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:46,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:46,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:03:46,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504571783] [2021-08-21 12:03:46,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:03:46,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:46,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:03:46,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:03:46,610 INFO L87 Difference]: Start difference. First operand 3123 states and 7913 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) [2021-08-21 12:03:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:46,791 INFO L93 Difference]: Finished difference Result 4139 states and 10113 transitions. [2021-08-21 12:03:46,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:03:46,792 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 41 [2021-08-21 12:03:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:46,798 INFO L225 Difference]: With dead ends: 4139 [2021-08-21 12:03:46,798 INFO L226 Difference]: Without dead ends: 4139 [2021-08-21 12:03:46,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:03:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-08-21 12:03:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3325. [2021-08-21 12:03:46,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3325 states, 3324 states have (on average 2.5643802647412755) internal successors, (8524), 3324 states have internal predecessors, (8524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3325 states to 3325 states and 8524 transitions. [2021-08-21 12:03:46,848 INFO L78 Accepts]: Start accepts. Automaton has 3325 states and 8524 transitions. Word has length 41 [2021-08-21 12:03:46,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:46,848 INFO L470 AbstractCegarLoop]: Abstraction has 3325 states and 8524 transitions. [2021-08-21 12:03:46,848 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) [2021-08-21 12:03:46,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3325 states and 8524 transitions. [2021-08-21 12:03:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:03:46,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:46,851 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:46,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:47,060 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,SelfDestructingSolverStorable168 [2021-08-21 12:03:47,061 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:47,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:47,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1646311550, now seen corresponding path program 37 times [2021-08-21 12:03:47,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:47,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410869590] [2021-08-21 12:03:47,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:47,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:47,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:47,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410869590] [2021-08-21 12:03:47,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410869590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:47,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396934210] [2021-08-21 12:03:47,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:03:47,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:47,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:47,163 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) [2021-08-21 12:03:47,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-21 12:03:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:50,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:03:50,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:50,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396934210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:50,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:50,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:03:50,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126002082] [2021-08-21 12:03:50,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:03:50,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:50,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:03:50,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:03:50,741 INFO L87 Difference]: Start difference. First operand 3325 states and 8524 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) [2021-08-21 12:03:51,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:51,055 INFO L93 Difference]: Finished difference Result 3891 states and 9712 transitions. [2021-08-21 12:03:51,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:03:51,055 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 [2021-08-21 12:03:51,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:51,062 INFO L225 Difference]: With dead ends: 3891 [2021-08-21 12:03:51,062 INFO L226 Difference]: Without dead ends: 3887 [2021-08-21 12:03:51,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:03:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3887 states. [2021-08-21 12:03:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3887 to 3213. [2021-08-21 12:03:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 2.587173100871731) internal successors, (8310), 3212 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) [2021-08-21 12:03:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 8310 transitions. [2021-08-21 12:03:51,110 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 8310 transitions. Word has length 41 [2021-08-21 12:03:51,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:51,110 INFO L470 AbstractCegarLoop]: Abstraction has 3213 states and 8310 transitions. [2021-08-21 12:03:51,110 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) [2021-08-21 12:03:51,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 8310 transitions. [2021-08-21 12:03:51,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:03:51,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:51,113 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:51,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:51,313 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,SelfDestructingSolverStorable169 [2021-08-21 12:03:51,314 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:51,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:51,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1015359362, now seen corresponding path program 74 times [2021-08-21 12:03:51,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:51,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434044666] [2021-08-21 12:03:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:51,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:51,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:51,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434044666] [2021-08-21 12:03:51,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434044666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:51,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045210805] [2021-08-21 12:03:51,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:03:51,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:51,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:51,433 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) [2021-08-21 12:03:51,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-21 12:03:54,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:03:54,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:54,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:03:54,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:55,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:03:55,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-21 12:03:55,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:03:55,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 12:03:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:55,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045210805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:55,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:55,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:03:55,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645852517] [2021-08-21 12:03:55,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:03:55,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:55,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:03:55,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:03:55,019 INFO L87 Difference]: Start difference. First operand 3213 states and 8310 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-08-21 12:03:55,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:55,138 INFO L93 Difference]: Finished difference Result 3233 states and 8341 transitions. [2021-08-21 12:03:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:03:55,139 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 41 [2021-08-21 12:03:55,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:55,144 INFO L225 Difference]: With dead ends: 3233 [2021-08-21 12:03:55,144 INFO L226 Difference]: Without dead ends: 3213 [2021-08-21 12:03:55,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:03:55,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2021-08-21 12:03:55,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 3213. [2021-08-21 12:03:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 2.586239103362391) internal successors, (8307), 3212 states have internal predecessors, (8307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:55,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 8307 transitions. [2021-08-21 12:03:55,189 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 8307 transitions. Word has length 41 [2021-08-21 12:03:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:55,189 INFO L470 AbstractCegarLoop]: Abstraction has 3213 states and 8307 transitions. [2021-08-21 12:03:55,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-08-21 12:03:55,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 8307 transitions. [2021-08-21 12:03:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:03:55,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:55,192 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:55,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2021-08-21 12:03:55,392 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,SelfDestructingSolverStorable170 [2021-08-21 12:03:55,393 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:55,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:55,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1228409929, now seen corresponding path program 75 times [2021-08-21 12:03:55,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:55,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553962512] [2021-08-21 12:03:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:55,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:03:55,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:55,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553962512] [2021-08-21 12:03:55,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553962512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:55,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147524898] [2021-08-21 12:03:55,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:03:55,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:55,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:55,509 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) [2021-08-21 12:03:55,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-21 12:03:58,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:03:58,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:03:58,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:03:58,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:03:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:59,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147524898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:59,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:03:59,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:03:59,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128150361] [2021-08-21 12:03:59,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:03:59,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:03:59,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:03:59,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:03:59,111 INFO L87 Difference]: Start difference. First operand 3213 states and 8307 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) [2021-08-21 12:03:59,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:03:59,252 INFO L93 Difference]: Finished difference Result 4352 states and 10749 transitions. [2021-08-21 12:03:59,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:03:59,253 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 41 [2021-08-21 12:03:59,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:03:59,259 INFO L225 Difference]: With dead ends: 4352 [2021-08-21 12:03:59,259 INFO L226 Difference]: Without dead ends: 4352 [2021-08-21 12:03:59,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:03:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-08-21 12:03:59,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3445. [2021-08-21 12:03:59,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3444 states have (on average 2.6132404181184667) internal successors, (9000), 3444 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:03:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 9000 transitions. [2021-08-21 12:03:59,314 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 9000 transitions. Word has length 41 [2021-08-21 12:03:59,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:03:59,314 INFO L470 AbstractCegarLoop]: Abstraction has 3445 states and 9000 transitions. [2021-08-21 12:03:59,314 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) [2021-08-21 12:03:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 9000 transitions. [2021-08-21 12:03:59,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:03:59,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:03:59,318 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:03:59,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2021-08-21 12:03:59,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:59,518 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:03:59,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:03:59,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1466471446, now seen corresponding path program 38 times [2021-08-21 12:03:59,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:03:59,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535134650] [2021-08-21 12:03:59,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:03:59,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:03:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:03:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:03:59,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:03:59,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535134650] [2021-08-21 12:03:59,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535134650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:03:59,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82186478] [2021-08-21 12:03:59,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:03:59,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:03:59,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:03:59,633 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) [2021-08-21 12:03:59,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-21 12:04:03,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:03,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:03,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:04:03,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:03,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82186478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:03,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:03,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:04:03,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17516006] [2021-08-21 12:04:03,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:04:03,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:03,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:04:03,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:04:03,213 INFO L87 Difference]: Start difference. First operand 3445 states and 9000 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) [2021-08-21 12:04:03,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:03,518 INFO L93 Difference]: Finished difference Result 3941 states and 9975 transitions. [2021-08-21 12:04:03,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:04:03,519 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 [2021-08-21 12:04:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:03,525 INFO L225 Difference]: With dead ends: 3941 [2021-08-21 12:04:03,525 INFO L226 Difference]: Without dead ends: 3933 [2021-08-21 12:04:03,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:04:03,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3933 states. [2021-08-21 12:04:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3933 to 3504. [2021-08-21 12:04:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3504 states, 3503 states have (on average 2.6083357122466455) internal successors, (9137), 3503 states have internal predecessors, (9137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3504 states to 3504 states and 9137 transitions. [2021-08-21 12:04:03,579 INFO L78 Accepts]: Start accepts. Automaton has 3504 states and 9137 transitions. Word has length 41 [2021-08-21 12:04:03,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:03,579 INFO L470 AbstractCegarLoop]: Abstraction has 3504 states and 9137 transitions. [2021-08-21 12:04:03,579 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) [2021-08-21 12:04:03,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3504 states and 9137 transitions. [2021-08-21 12:04:03,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:04:03,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:03,583 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:03,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:03,783 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,SelfDestructingSolverStorable172 [2021-08-21 12:04:03,783 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:03,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:03,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1274798993, now seen corresponding path program 76 times [2021-08-21 12:04:03,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:03,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888959078] [2021-08-21 12:04:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:03,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:03,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:03,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888959078] [2021-08-21 12:04:03,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888959078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:03,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999336943] [2021-08-21 12:04:03,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:03,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:03,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:03,881 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) [2021-08-21 12:04:03,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-21 12:04:07,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:07,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:07,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:04:07,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:07,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999336943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:07,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:07,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:04:07,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165193209] [2021-08-21 12:04:07,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:04:07,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:07,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:04:07,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:04:07,571 INFO L87 Difference]: Start difference. First operand 3504 states and 9137 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) [2021-08-21 12:04:07,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:07,712 INFO L93 Difference]: Finished difference Result 4336 states and 10702 transitions. [2021-08-21 12:04:07,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:04:07,713 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 41 [2021-08-21 12:04:07,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:07,720 INFO L225 Difference]: With dead ends: 4336 [2021-08-21 12:04:07,720 INFO L226 Difference]: Without dead ends: 4333 [2021-08-21 12:04:07,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:04:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-08-21 12:04:07,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3503. [2021-08-21 12:04:07,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.6073672187321533) internal successors, (9131), 3502 states have internal predecessors, (9131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9131 transitions. [2021-08-21 12:04:07,776 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9131 transitions. Word has length 41 [2021-08-21 12:04:07,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:07,776 INFO L470 AbstractCegarLoop]: Abstraction has 3503 states and 9131 transitions. [2021-08-21 12:04:07,776 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) [2021-08-21 12:04:07,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9131 transitions. [2021-08-21 12:04:07,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:04:07,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:07,780 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:07,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:07,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:07,981 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:07,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1481861559, now seen corresponding path program 77 times [2021-08-21 12:04:07,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:07,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883570992] [2021-08-21 12:04:07,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:07,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:08,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:08,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883570992] [2021-08-21 12:04:08,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883570992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:08,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758935511] [2021-08-21 12:04:08,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:08,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:08,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:08,081 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) [2021-08-21 12:04:08,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-21 12:04:11,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:04:11,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:11,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:04:11,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:11,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758935511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:11,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:11,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2021-08-21 12:04:11,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140101821] [2021-08-21 12:04:11,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:04:11,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:11,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:04:11,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:04:11,765 INFO L87 Difference]: Start difference. First operand 3503 states and 9131 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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) [2021-08-21 12:04:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:11,953 INFO L93 Difference]: Finished difference Result 4312 states and 10784 transitions. [2021-08-21 12:04:11,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:04:11,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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 41 [2021-08-21 12:04:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:11,960 INFO L225 Difference]: With dead ends: 4312 [2021-08-21 12:04:11,960 INFO L226 Difference]: Without dead ends: 4300 [2021-08-21 12:04:11,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:04:11,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2021-08-21 12:04:12,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 3503. [2021-08-21 12:04:12,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.606510565391205) internal successors, (9128), 3502 states have internal predecessors, (9128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:12,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9128 transitions. [2021-08-21 12:04:12,017 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9128 transitions. Word has length 41 [2021-08-21 12:04:12,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:12,017 INFO L470 AbstractCegarLoop]: Abstraction has 3503 states and 9128 transitions. [2021-08-21 12:04:12,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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) [2021-08-21 12:04:12,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9128 transitions. [2021-08-21 12:04:12,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:04:12,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:12,021 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:12,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2021-08-21 12:04:12,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:12,221 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:12,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:12,222 INFO L82 PathProgramCache]: Analyzing trace with hash 33861546, now seen corresponding path program 78 times [2021-08-21 12:04:12,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:12,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533673919] [2021-08-21 12:04:12,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:12,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:12,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:12,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533673919] [2021-08-21 12:04:12,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533673919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:12,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479412921] [2021-08-21 12:04:12,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:12,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:12,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:12,329 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) [2021-08-21 12:04:12,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-21 12:04:15,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:04:15,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:15,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:04:15,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:15,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479412921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:15,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:15,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:04:15,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480422309] [2021-08-21 12:04:15,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:04:16,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:16,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:04:16,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:04:16,000 INFO L87 Difference]: Start difference. First operand 3503 states and 9128 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-08-21 12:04:16,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:16,305 INFO L93 Difference]: Finished difference Result 3805 states and 9626 transitions. [2021-08-21 12:04:16,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:04:16,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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 41 [2021-08-21 12:04:16,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:16,311 INFO L225 Difference]: With dead ends: 3805 [2021-08-21 12:04:16,311 INFO L226 Difference]: Without dead ends: 3708 [2021-08-21 12:04:16,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:04:16,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2021-08-21 12:04:16,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 3409. [2021-08-21 12:04:16,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3409 states, 3408 states have (on average 2.613556338028169) internal successors, (8907), 3408 states have internal predecessors, (8907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3409 states to 3409 states and 8907 transitions. [2021-08-21 12:04:16,390 INFO L78 Accepts]: Start accepts. Automaton has 3409 states and 8907 transitions. Word has length 41 [2021-08-21 12:04:16,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:16,390 INFO L470 AbstractCegarLoop]: Abstraction has 3409 states and 8907 transitions. [2021-08-21 12:04:16,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-08-21 12:04:16,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3409 states and 8907 transitions. [2021-08-21 12:04:16,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:04:16,393 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:16,393 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:16,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2021-08-21 12:04:16,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-08-21 12:04:16,594 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:16,594 INFO L82 PathProgramCache]: Analyzing trace with hash -579674634, now seen corresponding path program 79 times [2021-08-21 12:04:16,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:16,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416732650] [2021-08-21 12:04:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:16,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:16,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:04:16,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:16,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416732650] [2021-08-21 12:04:16,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416732650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:16,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102701036] [2021-08-21 12:04:16,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:16,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:16,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:16,717 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) [2021-08-21 12:04:16,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-21 12:04:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:20,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:04:20,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:04:20,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102701036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:20,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:20,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 12:04:20,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410848009] [2021-08-21 12:04:20,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:04:20,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:20,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:04:20,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:04:20,481 INFO L87 Difference]: Start difference. First operand 3409 states and 8907 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) [2021-08-21 12:04:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:20,824 INFO L93 Difference]: Finished difference Result 3848 states and 9749 transitions. [2021-08-21 12:04:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:04:20,824 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 [2021-08-21 12:04:20,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:20,832 INFO L225 Difference]: With dead ends: 3848 [2021-08-21 12:04:20,832 INFO L226 Difference]: Without dead ends: 3836 [2021-08-21 12:04:20,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:04:20,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3836 states. [2021-08-21 12:04:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3836 to 3411. [2021-08-21 12:04:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 2.613489736070381) internal successors, (8912), 3410 states have internal predecessors, (8912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 8912 transitions. [2021-08-21 12:04:20,899 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 8912 transitions. Word has length 41 [2021-08-21 12:04:20,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:20,899 INFO L470 AbstractCegarLoop]: Abstraction has 3411 states and 8912 transitions. [2021-08-21 12:04:20,899 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) [2021-08-21 12:04:20,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 8912 transitions. [2021-08-21 12:04:20,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:04:20,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:20,903 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:20,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:21,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:21,122 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:21,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:21,122 INFO L82 PathProgramCache]: Analyzing trace with hash -736974121, now seen corresponding path program 39 times [2021-08-21 12:04:21,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:21,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913351492] [2021-08-21 12:04:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:21,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:21,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:21,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913351492] [2021-08-21 12:04:21,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913351492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:21,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423689676] [2021-08-21 12:04:21,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:21,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:21,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:21,240 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) [2021-08-21 12:04:21,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-21 12:04:24,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:04:24,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:24,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:04:24,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:25,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423689676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:25,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:25,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:04:25,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016139208] [2021-08-21 12:04:25,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:04:25,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:25,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:04:25,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:04:25,042 INFO L87 Difference]: Start difference. First operand 3411 states and 8912 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-08-21 12:04:25,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:25,201 INFO L93 Difference]: Finished difference Result 4058 states and 10288 transitions. [2021-08-21 12:04:25,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:04:25,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 41 [2021-08-21 12:04:25,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:25,208 INFO L225 Difference]: With dead ends: 4058 [2021-08-21 12:04:25,208 INFO L226 Difference]: Without dead ends: 4048 [2021-08-21 12:04:25,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:04:25,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4048 states. [2021-08-21 12:04:25,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4048 to 3653. [2021-08-21 12:04:25,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.6130887185104053) internal successors, (9543), 3652 states have internal predecessors, (9543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 9543 transitions. [2021-08-21 12:04:25,263 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 9543 transitions. Word has length 41 [2021-08-21 12:04:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:25,263 INFO L470 AbstractCegarLoop]: Abstraction has 3653 states and 9543 transitions. [2021-08-21 12:04:25,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-08-21 12:04:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 9543 transitions. [2021-08-21 12:04:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:04:25,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:25,266 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:25,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2021-08-21 12:04:25,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:25,467 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:25,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:25,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1562242700, now seen corresponding path program 80 times [2021-08-21 12:04:25,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:25,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744223283] [2021-08-21 12:04:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:25,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:25,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:25,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744223283] [2021-08-21 12:04:25,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744223283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:25,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765888970] [2021-08-21 12:04:25,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:25,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:25,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:25,567 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) [2021-08-21 12:04:25,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-21 12:04:29,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:29,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:29,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:04:29,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:29,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:04:29,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-21 12:04:29,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:04:29,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-08-21 12:04:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:29,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765888970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:29,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:29,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-21 12:04:29,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427784850] [2021-08-21 12:04:29,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:04:29,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:29,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:04:29,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:04:29,365 INFO L87 Difference]: Start difference. First operand 3653 states and 9543 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:29,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:29,811 INFO L93 Difference]: Finished difference Result 4913 states and 12124 transitions. [2021-08-21 12:04:29,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:04:29,812 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 12:04:29,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:29,819 INFO L225 Difference]: With dead ends: 4913 [2021-08-21 12:04:29,820 INFO L226 Difference]: Without dead ends: 4859 [2021-08-21 12:04:29,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:04:29,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4859 states. [2021-08-21 12:04:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4859 to 3736. [2021-08-21 12:04:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3736 states, 3735 states have (on average 2.61285140562249) internal successors, (9759), 3735 states have internal predecessors, (9759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3736 states to 3736 states and 9759 transitions. [2021-08-21 12:04:29,885 INFO L78 Accepts]: Start accepts. Automaton has 3736 states and 9759 transitions. Word has length 41 [2021-08-21 12:04:29,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:29,885 INFO L470 AbstractCegarLoop]: Abstraction has 3736 states and 9759 transitions. [2021-08-21 12:04:29,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:29,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3736 states and 9759 transitions. [2021-08-21 12:04:29,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:04:29,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:29,889 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:29,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2021-08-21 12:04:30,089 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,SelfDestructingSolverStorable178 [2021-08-21 12:04:30,089 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:30,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:30,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1200165487, now seen corresponding path program 81 times [2021-08-21 12:04:30,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:30,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43977896] [2021-08-21 12:04:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:30,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:30,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:30,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43977896] [2021-08-21 12:04:30,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43977896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:30,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144052911] [2021-08-21 12:04:30,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:04:30,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:30,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:30,194 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) [2021-08-21 12:04:30,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-21 12:04:33,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:04:33,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:33,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:04:33,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:33,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144052911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:33,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:33,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 12:04:33,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994004446] [2021-08-21 12:04:33,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:04:33,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:33,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:04:33,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:04:33,991 INFO L87 Difference]: Start difference. First operand 3736 states and 9759 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-08-21 12:04:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:34,134 INFO L93 Difference]: Finished difference Result 4470 states and 11244 transitions. [2021-08-21 12:04:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:04:34,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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 41 [2021-08-21 12:04:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:34,141 INFO L225 Difference]: With dead ends: 4470 [2021-08-21 12:04:34,141 INFO L226 Difference]: Without dead ends: 4452 [2021-08-21 12:04:34,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:04:34,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4452 states. [2021-08-21 12:04:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4452 to 3826. [2021-08-21 12:04:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3826 states, 3825 states have (on average 2.624575163398693) internal successors, (10039), 3825 states have internal predecessors, (10039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3826 states to 3826 states and 10039 transitions. [2021-08-21 12:04:34,204 INFO L78 Accepts]: Start accepts. Automaton has 3826 states and 10039 transitions. Word has length 41 [2021-08-21 12:04:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:34,204 INFO L470 AbstractCegarLoop]: Abstraction has 3826 states and 10039 transitions. [2021-08-21 12:04:34,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-08-21 12:04:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3826 states and 10039 transitions. [2021-08-21 12:04:34,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:04:34,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:34,208 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:34,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2021-08-21 12:04:34,411 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,SelfDestructingSolverStorable179 [2021-08-21 12:04:34,412 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:34,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:34,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1717079234, now seen corresponding path program 82 times [2021-08-21 12:04:34,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:34,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785029919] [2021-08-21 12:04:34,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:34,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:34,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:34,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785029919] [2021-08-21 12:04:34,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785029919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:34,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100003033] [2021-08-21 12:04:34,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:34,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:34,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:34,538 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) [2021-08-21 12:04:34,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-21 12:04:38,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:04:38,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:38,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 12:04:38,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:38,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:04:38,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-21 12:04:38,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:04:38,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-08-21 12:04:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:38,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100003033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:38,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:38,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-21 12:04:38,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905753046] [2021-08-21 12:04:38,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:04:38,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:38,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:04:38,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:04:38,463 INFO L87 Difference]: Start difference. First operand 3826 states and 10039 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) [2021-08-21 12:04:39,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:39,118 INFO L93 Difference]: Finished difference Result 7033 states and 16716 transitions. [2021-08-21 12:04:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 12:04:39,118 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 41 [2021-08-21 12:04:39,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:39,130 INFO L225 Difference]: With dead ends: 7033 [2021-08-21 12:04:39,130 INFO L226 Difference]: Without dead ends: 6853 [2021-08-21 12:04:39,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 340.6ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:04:39,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6853 states. [2021-08-21 12:04:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6853 to 4043. [2021-08-21 12:04:39,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4043 states, 4042 states have (on average 2.6150420583869374) internal successors, (10570), 4042 states have internal predecessors, (10570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:39,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4043 states to 4043 states and 10570 transitions. [2021-08-21 12:04:39,216 INFO L78 Accepts]: Start accepts. Automaton has 4043 states and 10570 transitions. Word has length 41 [2021-08-21 12:04:39,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:39,216 INFO L470 AbstractCegarLoop]: Abstraction has 4043 states and 10570 transitions. [2021-08-21 12:04:39,216 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) [2021-08-21 12:04:39,216 INFO L276 IsEmpty]: Start isEmpty. Operand 4043 states and 10570 transitions. [2021-08-21 12:04:39,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:04:39,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:39,220 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:39,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2021-08-21 12:04:39,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:39,420 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:39,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:39,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2103681911, now seen corresponding path program 83 times [2021-08-21 12:04:39,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:39,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98303135] [2021-08-21 12:04:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:39,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:39,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:39,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98303135] [2021-08-21 12:04:39,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98303135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:39,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098381819] [2021-08-21 12:04:39,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:04:39,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:39,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:39,534 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) [2021-08-21 12:04:39,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-21 12:04:43,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:04:43,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:43,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:04:43,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:43,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098381819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:43,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:43,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-08-21 12:04:43,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736581894] [2021-08-21 12:04:43,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:04:43,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:43,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:04:43,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:04:43,422 INFO L87 Difference]: Start difference. First operand 4043 states and 10570 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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) [2021-08-21 12:04:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:43,623 INFO L93 Difference]: Finished difference Result 4874 states and 12132 transitions. [2021-08-21 12:04:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:04:43,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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 41 [2021-08-21 12:04:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:43,631 INFO L225 Difference]: With dead ends: 4874 [2021-08-21 12:04:43,632 INFO L226 Difference]: Without dead ends: 4847 [2021-08-21 12:04:43,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:04:43,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4847 states. [2021-08-21 12:04:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4847 to 4043. [2021-08-21 12:04:43,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4043 states, 4042 states have (on average 2.614299851558634) internal successors, (10567), 4042 states have internal predecessors, (10567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:43,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4043 states to 4043 states and 10567 transitions. [2021-08-21 12:04:43,701 INFO L78 Accepts]: Start accepts. Automaton has 4043 states and 10567 transitions. Word has length 41 [2021-08-21 12:04:43,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:43,701 INFO L470 AbstractCegarLoop]: Abstraction has 4043 states and 10567 transitions. [2021-08-21 12:04:43,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 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) [2021-08-21 12:04:43,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4043 states and 10567 transitions. [2021-08-21 12:04:43,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:04:43,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:43,704 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:43,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:43,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:43,905 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:43,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:43,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1657387724, now seen corresponding path program 84 times [2021-08-21 12:04:43,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:43,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867212047] [2021-08-21 12:04:43,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:43,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:44,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:44,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867212047] [2021-08-21 12:04:44,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867212047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:44,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972275017] [2021-08-21 12:04:44,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:04:44,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:44,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:44,027 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) [2021-08-21 12:04:44,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-21 12:04:47,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:04:47,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:47,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:04:47,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:04:47,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972275017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:47,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:47,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:04:47,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336636634] [2021-08-21 12:04:47,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:04:47,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:04:47,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:04:47,880 INFO L87 Difference]: Start difference. First operand 4043 states and 10567 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) [2021-08-21 12:04:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:48,870 INFO L93 Difference]: Finished difference Result 8156 states and 19246 transitions. [2021-08-21 12:04:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 12:04:48,870 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 41 [2021-08-21 12:04:48,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:48,884 INFO L225 Difference]: With dead ends: 8156 [2021-08-21 12:04:48,884 INFO L226 Difference]: Without dead ends: 7880 [2021-08-21 12:04:48,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 647.0ms TimeCoverageRelationStatistics Valid=483, Invalid=3423, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 12:04:48,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7880 states. [2021-08-21 12:04:48,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7880 to 4399. [2021-08-21 12:04:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4398 states have (on average 2.600954979536153) internal successors, (11439), 4398 states have internal predecessors, (11439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 11439 transitions. [2021-08-21 12:04:48,970 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 11439 transitions. Word has length 41 [2021-08-21 12:04:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:48,970 INFO L470 AbstractCegarLoop]: Abstraction has 4399 states and 11439 transitions. [2021-08-21 12:04:48,970 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) [2021-08-21 12:04:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 11439 transitions. [2021-08-21 12:04:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:04:48,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:48,974 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:49,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2021-08-21 12:04:49,174 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,SelfDestructingSolverStorable182 [2021-08-21 12:04:49,175 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:49,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:49,175 INFO L82 PathProgramCache]: Analyzing trace with hash -744006703, now seen corresponding path program 85 times [2021-08-21 12:04:49,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:49,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324085623] [2021-08-21 12:04:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:49,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:49,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:49,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324085623] [2021-08-21 12:04:49,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324085623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:49,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222293610] [2021-08-21 12:04:49,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:04:49,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:49,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:49,333 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) [2021-08-21 12:04:49,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-21 12:04:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:53,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:04:53,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:53,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222293610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:53,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:53,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:04:53,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437485559] [2021-08-21 12:04:53,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:04:53,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:53,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:04:53,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:04:53,279 INFO L87 Difference]: Start difference. First operand 4399 states and 11439 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2021-08-21 12:04:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:53,475 INFO L93 Difference]: Finished difference Result 5326 states and 13165 transitions. [2021-08-21 12:04:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:04:53,476 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 41 [2021-08-21 12:04:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:53,484 INFO L225 Difference]: With dead ends: 5326 [2021-08-21 12:04:53,484 INFO L226 Difference]: Without dead ends: 5290 [2021-08-21 12:04:53,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:04:53,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5290 states. [2021-08-21 12:04:53,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5290 to 4399. [2021-08-21 12:04:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4398 states have (on average 2.600272851296044) internal successors, (11436), 4398 states have internal predecessors, (11436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:53,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 11436 transitions. [2021-08-21 12:04:53,558 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 11436 transitions. Word has length 41 [2021-08-21 12:04:53,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:53,559 INFO L470 AbstractCegarLoop]: Abstraction has 4399 states and 11436 transitions. [2021-08-21 12:04:53,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2021-08-21 12:04:53,559 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 11436 transitions. [2021-08-21 12:04:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:04:53,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:53,563 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:53,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:53,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-08-21 12:04:53,764 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:53,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:53,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1504073858, now seen corresponding path program 86 times [2021-08-21 12:04:53,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:53,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684639068] [2021-08-21 12:04:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:53,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:53,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:53,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684639068] [2021-08-21 12:04:53,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684639068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:53,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627642211] [2021-08-21 12:04:53,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:04:53,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:53,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:53,891 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) [2021-08-21 12:04:53,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-21 12:04:57,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:04:57,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:04:57,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 12:04:57,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:04:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:04:57,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627642211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:57,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:04:57,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:04:57,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986519489] [2021-08-21 12:04:57,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:04:57,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:04:57,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:04:57,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:04:57,763 INFO L87 Difference]: Start difference. First operand 4399 states and 11436 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) [2021-08-21 12:04:58,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:04:58,189 INFO L93 Difference]: Finished difference Result 5629 states and 13668 transitions. [2021-08-21 12:04:58,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:04:58,190 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 [2021-08-21 12:04:58,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:04:58,198 INFO L225 Difference]: With dead ends: 5629 [2021-08-21 12:04:58,198 INFO L226 Difference]: Without dead ends: 5251 [2021-08-21 12:04:58,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:04:58,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-08-21 12:04:58,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 3571. [2021-08-21 12:04:58,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 2.6439775910364145) internal successors, (9439), 3570 states have internal predecessors, (9439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:04:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 9439 transitions. [2021-08-21 12:04:58,259 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 9439 transitions. Word has length 41 [2021-08-21 12:04:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:04:58,259 INFO L470 AbstractCegarLoop]: Abstraction has 3571 states and 9439 transitions. [2021-08-21 12:04:58,259 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) [2021-08-21 12:04:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 9439 transitions. [2021-08-21 12:04:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:04:58,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:04:58,262 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:04:58,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2021-08-21 12:04:58,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:58,463 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:04:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:04:58,463 INFO L82 PathProgramCache]: Analyzing trace with hash 644131931, now seen corresponding path program 40 times [2021-08-21 12:04:58,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:04:58,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547492052] [2021-08-21 12:04:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:04:58,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:04:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:04:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:04:58,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:04:58,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547492052] [2021-08-21 12:04:58,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547492052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:04:58,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897311655] [2021-08-21 12:04:58,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:04:58,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:04:58,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:04:58,566 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) [2021-08-21 12:04:58,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-21 12:05:02,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:05:02,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:02,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:02,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:02,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897311655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:02,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:02,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2021-08-21 12:05:02,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990711773] [2021-08-21 12:05:02,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:05:02,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:02,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:05:02,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:05:02,606 INFO L87 Difference]: Start difference. First operand 3571 states and 9439 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) [2021-08-21 12:05:02,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:02,976 INFO L93 Difference]: Finished difference Result 4371 states and 11018 transitions. [2021-08-21 12:05:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:05:02,977 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 41 [2021-08-21 12:05:02,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:02,983 INFO L225 Difference]: With dead ends: 4371 [2021-08-21 12:05:02,983 INFO L226 Difference]: Without dead ends: 4371 [2021-08-21 12:05:02,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:05:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2021-08-21 12:05:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3526. [2021-08-21 12:05:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 2.6536170212765957) internal successors, (9354), 3525 states have internal predecessors, (9354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 9354 transitions. [2021-08-21 12:05:03,041 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 9354 transitions. Word has length 41 [2021-08-21 12:05:03,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:03,041 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 9354 transitions. [2021-08-21 12:05:03,041 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) [2021-08-21 12:05:03,041 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 9354 transitions. [2021-08-21 12:05:03,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 12:05:03,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:03,044 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:03,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2021-08-21 12:05:03,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:03,245 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:03,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:03,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2041475785, now seen corresponding path program 87 times [2021-08-21 12:05:03,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:03,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583995398] [2021-08-21 12:05:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:03,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:03,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:03,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583995398] [2021-08-21 12:05:03,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583995398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:03,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125143510] [2021-08-21 12:05:03,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:05:03,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:03,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:03,397 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) [2021-08-21 12:05:03,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-21 12:05:07,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:05:07,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:07,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:05:07,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:08,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125143510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:08,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:08,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-08-21 12:05:08,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499593747] [2021-08-21 12:05:08,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:05:08,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:08,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:05:08,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:05:08,140 INFO L87 Difference]: Start difference. First operand 3526 states and 9354 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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) [2021-08-21 12:05:17,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:17,251 INFO L93 Difference]: Finished difference Result 5989 states and 14828 transitions. [2021-08-21 12:05:17,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:05:17,251 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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 41 [2021-08-21 12:05:17,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:17,263 INFO L225 Difference]: With dead ends: 5989 [2021-08-21 12:05:17,264 INFO L226 Difference]: Without dead ends: 5897 [2021-08-21 12:05:17,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 680.9ms TimeCoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 12:05:17,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5897 states. [2021-08-21 12:05:17,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5897 to 3535. [2021-08-21 12:05:17,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 2.650820599886814) internal successors, (9368), 3534 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 9368 transitions. [2021-08-21 12:05:17,357 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 9368 transitions. Word has length 41 [2021-08-21 12:05:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:17,357 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 9368 transitions. [2021-08-21 12:05:17,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 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) [2021-08-21 12:05:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 9368 transitions. [2021-08-21 12:05:17,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 12:05:17,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:17,362 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:17,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:17,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:17,565 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:17,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:17,565 INFO L82 PathProgramCache]: Analyzing trace with hash -79555922, now seen corresponding path program 88 times [2021-08-21 12:05:17,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:17,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617405811] [2021-08-21 12:05:17,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:17,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:05:17,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:17,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617405811] [2021-08-21 12:05:17,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617405811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:17,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810589853] [2021-08-21 12:05:17,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:05:17,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:17,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:17,693 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) [2021-08-21 12:05:17,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-21 12:05:21,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:05:21,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:21,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:21,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:22,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810589853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:22,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:22,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-08-21 12:05:22,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134577431] [2021-08-21 12:05:22,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:05:22,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:22,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:05:22,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:05:22,153 INFO L87 Difference]: Start difference. First operand 3535 states and 9368 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) [2021-08-21 12:05:23,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:23,287 INFO L93 Difference]: Finished difference Result 5472 states and 13303 transitions. [2021-08-21 12:05:23,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:05:23,288 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 [2021-08-21 12:05:23,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:23,296 INFO L225 Difference]: With dead ends: 5472 [2021-08-21 12:05:23,296 INFO L226 Difference]: Without dead ends: 5434 [2021-08-21 12:05:23,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 646.5ms TimeCoverageRelationStatistics Valid=473, Invalid=1783, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 12:05:23,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-08-21 12:05:23,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 4165. [2021-08-21 12:05:23,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4165 states, 4164 states have (on average 2.6183957732949086) internal successors, (10903), 4164 states have internal predecessors, (10903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4165 states to 4165 states and 10903 transitions. [2021-08-21 12:05:23,375 INFO L78 Accepts]: Start accepts. Automaton has 4165 states and 10903 transitions. Word has length 44 [2021-08-21 12:05:23,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:23,375 INFO L470 AbstractCegarLoop]: Abstraction has 4165 states and 10903 transitions. [2021-08-21 12:05:23,375 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) [2021-08-21 12:05:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 4165 states and 10903 transitions. [2021-08-21 12:05:23,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 12:05:23,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:23,380 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:23,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2021-08-21 12:05:23,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:23,581 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:23,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:23,581 INFO L82 PathProgramCache]: Analyzing trace with hash -945685074, now seen corresponding path program 89 times [2021-08-21 12:05:23,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:23,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124458311] [2021-08-21 12:05:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:23,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 12:05:23,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:23,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124458311] [2021-08-21 12:05:23,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124458311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:23,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445262530] [2021-08-21 12:05:23,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:05:23,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:23,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:23,691 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) [2021-08-21 12:05:23,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-21 12:05:27,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 12:05:27,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:27,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:05:27,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 12:05:27,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445262530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:27,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:27,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:05:27,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760909952] [2021-08-21 12:05:27,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:05:27,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:27,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:05:27,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:05:27,872 INFO L87 Difference]: Start difference. First operand 4165 states and 10903 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) [2021-08-21 12:05:28,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:28,099 INFO L93 Difference]: Finished difference Result 4791 states and 12152 transitions. [2021-08-21 12:05:28,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:05:28,099 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 [2021-08-21 12:05:28,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:28,107 INFO L225 Difference]: With dead ends: 4791 [2021-08-21 12:05:28,107 INFO L226 Difference]: Without dead ends: 4756 [2021-08-21 12:05:28,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:05:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4756 states. [2021-08-21 12:05:28,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4756 to 4183. [2021-08-21 12:05:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 2.616212338593974) internal successors, (10941), 4182 states have internal predecessors, (10941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:28,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 10941 transitions. [2021-08-21 12:05:28,175 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 10941 transitions. Word has length 44 [2021-08-21 12:05:28,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:28,175 INFO L470 AbstractCegarLoop]: Abstraction has 4183 states and 10941 transitions. [2021-08-21 12:05:28,175 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) [2021-08-21 12:05:28,175 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 10941 transitions. [2021-08-21 12:05:28,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 12:05:28,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:28,180 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:28,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:28,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-08-21 12:05:28,380 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:28,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:28,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1632538552, now seen corresponding path program 90 times [2021-08-21 12:05:28,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:28,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523419082] [2021-08-21 12:05:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:28,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 12:05:28,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:28,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523419082] [2021-08-21 12:05:28,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523419082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:28,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274366491] [2021-08-21 12:05:28,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:05:28,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:28,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:28,488 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) [2021-08-21 12:05:28,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-21 12:05:32,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 12:05:32,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:32,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:32,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 19 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:05:32,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274366491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:32,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:32,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 12:05:32,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18270380] [2021-08-21 12:05:32,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:32,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:32,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:32,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:32,728 INFO L87 Difference]: Start difference. First operand 4183 states and 10941 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) [2021-08-21 12:05:33,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:33,475 INFO L93 Difference]: Finished difference Result 6319 states and 15114 transitions. [2021-08-21 12:05:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:05:33,475 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 [2021-08-21 12:05:33,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:33,485 INFO L225 Difference]: With dead ends: 6319 [2021-08-21 12:05:33,486 INFO L226 Difference]: Without dead ends: 6256 [2021-08-21 12:05:33,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 327.3ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:05:33,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2021-08-21 12:05:33,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 4253. [2021-08-21 12:05:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4253 states, 4252 states have (on average 2.6067732831608654) internal successors, (11084), 4252 states have internal predecessors, (11084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4253 states to 4253 states and 11084 transitions. [2021-08-21 12:05:33,560 INFO L78 Accepts]: Start accepts. Automaton has 4253 states and 11084 transitions. Word has length 44 [2021-08-21 12:05:33,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:33,560 INFO L470 AbstractCegarLoop]: Abstraction has 4253 states and 11084 transitions. [2021-08-21 12:05:33,560 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) [2021-08-21 12:05:33,560 INFO L276 IsEmpty]: Start isEmpty. Operand 4253 states and 11084 transitions. [2021-08-21 12:05:33,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 12:05:33,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:33,564 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:33,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2021-08-21 12:05:33,765 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,SelfDestructingSolverStorable189 [2021-08-21 12:05:33,765 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:33,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1834663790, now seen corresponding path program 91 times [2021-08-21 12:05:33,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:33,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697446699] [2021-08-21 12:05:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:33,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 12:05:33,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:33,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697446699] [2021-08-21 12:05:33,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697446699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:33,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920553552] [2021-08-21 12:05:33,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:05:33,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:33,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:33,864 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) [2021-08-21 12:05:33,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-21 12:05:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:37,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 12:05:37,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 12:05:38,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920553552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:38,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:38,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:05:38,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915532036] [2021-08-21 12:05:38,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:05:38,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:38,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:05:38,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:05:38,052 INFO L87 Difference]: Start difference. First operand 4253 states and 11084 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) [2021-08-21 12:05:38,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:38,283 INFO L93 Difference]: Finished difference Result 4892 states and 12347 transitions. [2021-08-21 12:05:38,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:05:38,283 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 [2021-08-21 12:05:38,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:38,290 INFO L225 Difference]: With dead ends: 4892 [2021-08-21 12:05:38,291 INFO L226 Difference]: Without dead ends: 4854 [2021-08-21 12:05:38,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:05:38,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4854 states. [2021-08-21 12:05:38,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4854 to 4325. [2021-08-21 12:05:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4325 states, 4324 states have (on average 2.595513413506013) internal successors, (11223), 4324 states have internal predecessors, (11223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:38,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4325 states to 4325 states and 11223 transitions. [2021-08-21 12:05:38,357 INFO L78 Accepts]: Start accepts. Automaton has 4325 states and 11223 transitions. Word has length 44 [2021-08-21 12:05:38,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:38,357 INFO L470 AbstractCegarLoop]: Abstraction has 4325 states and 11223 transitions. [2021-08-21 12:05:38,357 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) [2021-08-21 12:05:38,357 INFO L276 IsEmpty]: Start isEmpty. Operand 4325 states and 11223 transitions. [2021-08-21 12:05:38,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 12:05:38,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:38,362 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:38,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:38,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:38,565 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash -703834488, now seen corresponding path program 92 times [2021-08-21 12:05:38,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:38,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432785918] [2021-08-21 12:05:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:38,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 12:05:38,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:38,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432785918] [2021-08-21 12:05:38,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432785918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:38,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023161745] [2021-08-21 12:05:38,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:05:38,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:38,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:38,705 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) [2021-08-21 12:05:38,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-21 12:05:42,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:05:42,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:42,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:42,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:05:43,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023161745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:43,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:43,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 12:05:43,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142440680] [2021-08-21 12:05:43,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:43,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:43,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:43,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:43,022 INFO L87 Difference]: Start difference. First operand 4325 states and 11223 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) [2021-08-21 12:05:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:43,819 INFO L93 Difference]: Finished difference Result 6671 states and 15728 transitions. [2021-08-21 12:05:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:05:43,819 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 [2021-08-21 12:05:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:43,831 INFO L225 Difference]: With dead ends: 6671 [2021-08-21 12:05:43,831 INFO L226 Difference]: Without dead ends: 6608 [2021-08-21 12:05:43,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:05:43,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6608 states. [2021-08-21 12:05:43,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6608 to 4429. [2021-08-21 12:05:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4429 states, 4428 states have (on average 2.580623306233062) internal successors, (11427), 4428 states have internal predecessors, (11427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4429 states to 4429 states and 11427 transitions. [2021-08-21 12:05:43,908 INFO L78 Accepts]: Start accepts. Automaton has 4429 states and 11427 transitions. Word has length 44 [2021-08-21 12:05:43,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:43,908 INFO L470 AbstractCegarLoop]: Abstraction has 4429 states and 11427 transitions. [2021-08-21 12:05:43,908 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) [2021-08-21 12:05:43,908 INFO L276 IsEmpty]: Start isEmpty. Operand 4429 states and 11427 transitions. [2021-08-21 12:05:43,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 12:05:43,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:43,912 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:43,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:44,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:44,113 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:44,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:44,113 INFO L82 PathProgramCache]: Analyzing trace with hash 678113582, now seen corresponding path program 93 times [2021-08-21 12:05:44,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:44,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320806115] [2021-08-21 12:05:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:44,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:05:44,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:44,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320806115] [2021-08-21 12:05:44,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320806115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:44,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557826193] [2021-08-21 12:05:44,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:05:44,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:44,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:44,209 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) [2021-08-21 12:05:44,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-21 12:05:48,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:05:48,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:48,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:05:48,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 26 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:48,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557826193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:48,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:48,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 12:05:48,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695387881] [2021-08-21 12:05:48,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:48,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:48,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:48,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:48,541 INFO L87 Difference]: Start difference. First operand 4429 states and 11427 transitions. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 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) [2021-08-21 12:05:49,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:49,356 INFO L93 Difference]: Finished difference Result 6995 states and 16572 transitions. [2021-08-21 12:05:49,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:05:49,357 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 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 [2021-08-21 12:05:49,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:49,368 INFO L225 Difference]: With dead ends: 6995 [2021-08-21 12:05:49,369 INFO L226 Difference]: Without dead ends: 6957 [2021-08-21 12:05:49,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 343.6ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:05:49,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6957 states. [2021-08-21 12:05:49,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6957 to 4866. [2021-08-21 12:05:49,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4866 states, 4865 states have (on average 2.5788283658787257) internal successors, (12546), 4865 states have internal predecessors, (12546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4866 states to 4866 states and 12546 transitions. [2021-08-21 12:05:49,455 INFO L78 Accepts]: Start accepts. Automaton has 4866 states and 12546 transitions. Word has length 44 [2021-08-21 12:05:49,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:49,455 INFO L470 AbstractCegarLoop]: Abstraction has 4866 states and 12546 transitions. [2021-08-21 12:05:49,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 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) [2021-08-21 12:05:49,455 INFO L276 IsEmpty]: Start isEmpty. Operand 4866 states and 12546 transitions. [2021-08-21 12:05:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:05:49,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:49,460 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:49,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2021-08-21 12:05:49,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:49,661 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:49,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:49,661 INFO L82 PathProgramCache]: Analyzing trace with hash -98819019, now seen corresponding path program 41 times [2021-08-21 12:05:49,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:49,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969368635] [2021-08-21 12:05:49,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:49,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:49,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:49,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969368635] [2021-08-21 12:05:49,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969368635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:49,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044019043] [2021-08-21 12:05:49,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:05:49,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:49,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:49,879 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) [2021-08-21 12:05:49,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-21 12:05:53,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:05:53,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:53,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:05:53,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:05:54,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044019043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:54,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:54,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-21 12:05:54,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156589376] [2021-08-21 12:05:54,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:05:54,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:54,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:05:54,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:05:54,143 INFO L87 Difference]: Start difference. First operand 4866 states and 12546 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) [2021-08-21 12:05:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:05:54,878 INFO L93 Difference]: Finished difference Result 6535 states and 16062 transitions. [2021-08-21 12:05:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:05:54,878 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 [2021-08-21 12:05:54,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:05:54,889 INFO L225 Difference]: With dead ends: 6535 [2021-08-21 12:05:54,889 INFO L226 Difference]: Without dead ends: 6492 [2021-08-21 12:05:54,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 393.3ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:05:54,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6492 states. [2021-08-21 12:05:54,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6492 to 5120. [2021-08-21 12:05:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5120 states, 5119 states have (on average 2.561828482125415) internal successors, (13114), 5119 states have internal predecessors, (13114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:05:54,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5120 states to 5120 states and 13114 transitions. [2021-08-21 12:05:54,973 INFO L78 Accepts]: Start accepts. Automaton has 5120 states and 13114 transitions. Word has length 47 [2021-08-21 12:05:54,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:05:54,973 INFO L470 AbstractCegarLoop]: Abstraction has 5120 states and 13114 transitions. [2021-08-21 12:05:54,973 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) [2021-08-21 12:05:54,973 INFO L276 IsEmpty]: Start isEmpty. Operand 5120 states and 13114 transitions. [2021-08-21 12:05:54,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:05:54,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:05:54,978 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:05:55,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2021-08-21 12:05:55,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:55,179 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:05:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:05:55,179 INFO L82 PathProgramCache]: Analyzing trace with hash -53611659, now seen corresponding path program 94 times [2021-08-21 12:05:55,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:05:55,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581544948] [2021-08-21 12:05:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:05:55,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:05:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:05:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:55,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:05:55,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581544948] [2021-08-21 12:05:55,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581544948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:55,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035282796] [2021-08-21 12:05:55,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:05:55,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:05:55,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:05:55,342 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) [2021-08-21 12:05:55,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-21 12:05:59,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:05:59,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:05:59,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:05:59,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:05:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:05:59,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035282796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:05:59,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:05:59,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-21 12:05:59,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930838765] [2021-08-21 12:05:59,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:05:59,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:05:59,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:05:59,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:05:59,704 INFO L87 Difference]: Start difference. First operand 5120 states and 13114 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) [2021-08-21 12:06:00,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:00,270 INFO L93 Difference]: Finished difference Result 5434 states and 13621 transitions. [2021-08-21 12:06:00,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:06:00,270 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 [2021-08-21 12:06:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:00,279 INFO L225 Difference]: With dead ends: 5434 [2021-08-21 12:06:00,279 INFO L226 Difference]: Without dead ends: 5390 [2021-08-21 12:06:00,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:06:00,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2021-08-21 12:06:00,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 5100. [2021-08-21 12:06:00,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5100 states, 5099 states have (on average 2.5603059423416354) internal successors, (13055), 5099 states have internal predecessors, (13055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:00,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5100 states to 5100 states and 13055 transitions. [2021-08-21 12:06:00,354 INFO L78 Accepts]: Start accepts. Automaton has 5100 states and 13055 transitions. Word has length 47 [2021-08-21 12:06:00,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:00,354 INFO L470 AbstractCegarLoop]: Abstraction has 5100 states and 13055 transitions. [2021-08-21 12:06:00,355 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) [2021-08-21 12:06:00,355 INFO L276 IsEmpty]: Start isEmpty. Operand 5100 states and 13055 transitions. [2021-08-21 12:06:00,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:06:00,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:00,360 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:00,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:00,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:00,560 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:00,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:00,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1460077889, now seen corresponding path program 95 times [2021-08-21 12:06:00,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:00,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374840261] [2021-08-21 12:06:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:00,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:00,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:00,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374840261] [2021-08-21 12:06:00,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374840261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:00,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474648474] [2021-08-21 12:06:00,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:00,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:00,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:00,703 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) [2021-08-21 12:06:00,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-21 12:06:04,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 12:06:04,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:04,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:06:04,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:05,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474648474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:05,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:05,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:06:05,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317303659] [2021-08-21 12:06:05,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:06:05,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:05,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:06:05,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:06:05,043 INFO L87 Difference]: Start difference. First operand 5100 states and 13055 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) [2021-08-21 12:06:05,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:05,374 INFO L93 Difference]: Finished difference Result 5664 states and 14122 transitions. [2021-08-21 12:06:05,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:06:05,374 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 [2021-08-21 12:06:05,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:05,383 INFO L225 Difference]: With dead ends: 5664 [2021-08-21 12:06:05,383 INFO L226 Difference]: Without dead ends: 5664 [2021-08-21 12:06:05,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:05,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5664 states. [2021-08-21 12:06:05,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5664 to 5112. [2021-08-21 12:06:05,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5112 states, 5111 states have (on average 2.561533946390139) internal successors, (13092), 5111 states have internal predecessors, (13092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5112 states to 5112 states and 13092 transitions. [2021-08-21 12:06:05,459 INFO L78 Accepts]: Start accepts. Automaton has 5112 states and 13092 transitions. Word has length 47 [2021-08-21 12:06:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:05,460 INFO L470 AbstractCegarLoop]: Abstraction has 5112 states and 13092 transitions. [2021-08-21 12:06:05,460 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) [2021-08-21 12:06:05,460 INFO L276 IsEmpty]: Start isEmpty. Operand 5112 states and 13092 transitions. [2021-08-21 12:06:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:06:05,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:05,465 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:05,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:05,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:05,666 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:05,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:05,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2124626571, now seen corresponding path program 96 times [2021-08-21 12:06:05,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:05,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819267468] [2021-08-21 12:06:05,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:05,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:05,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:05,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819267468] [2021-08-21 12:06:05,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819267468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:05,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026463067] [2021-08-21 12:06:05,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:05,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:05,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:05,845 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) [2021-08-21 12:06:05,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-21 12:06:09,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:06:09,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:09,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:06:09,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:10,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026463067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:10,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:10,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 12:06:10,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130891082] [2021-08-21 12:06:10,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:06:10,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:10,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:06:10,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:06:10,335 INFO L87 Difference]: Start difference. First operand 5112 states and 13092 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:10,910 INFO L93 Difference]: Finished difference Result 5490 states and 13718 transitions. [2021-08-21 12:06:10,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:06:10,911 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 12:06:10,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:10,919 INFO L225 Difference]: With dead ends: 5490 [2021-08-21 12:06:10,919 INFO L226 Difference]: Without dead ends: 5402 [2021-08-21 12:06:10,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:06:10,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2021-08-21 12:06:10,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 5112. [2021-08-21 12:06:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5112 states, 5111 states have (on average 2.560360007826257) internal successors, (13086), 5111 states have internal predecessors, (13086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:10,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5112 states to 5112 states and 13086 transitions. [2021-08-21 12:06:10,992 INFO L78 Accepts]: Start accepts. Automaton has 5112 states and 13086 transitions. Word has length 47 [2021-08-21 12:06:10,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:10,992 INFO L470 AbstractCegarLoop]: Abstraction has 5112 states and 13086 transitions. [2021-08-21 12:06:10,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 5112 states and 13086 transitions. [2021-08-21 12:06:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:06:10,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:10,997 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:11,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2021-08-21 12:06:11,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:11,198 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:11,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:11,198 INFO L82 PathProgramCache]: Analyzing trace with hash -361757880, now seen corresponding path program 42 times [2021-08-21 12:06:11,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:11,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520500682] [2021-08-21 12:06:11,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:11,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:11,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:11,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520500682] [2021-08-21 12:06:11,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520500682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:11,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943654042] [2021-08-21 12:06:11,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:11,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:11,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:11,385 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) [2021-08-21 12:06:11,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-21 12:06:15,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:06:15,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:15,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:06:15,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:15,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943654042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:15,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:15,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 17 [2021-08-21 12:06:15,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41026571] [2021-08-21 12:06:15,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:06:15,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:15,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:06:15,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:06:15,842 INFO L87 Difference]: Start difference. First operand 5112 states and 13086 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 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) [2021-08-21 12:06:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:16,201 INFO L93 Difference]: Finished difference Result 7216 states and 17280 transitions. [2021-08-21 12:06:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:06:16,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 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 47 [2021-08-21 12:06:16,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:16,213 INFO L225 Difference]: With dead ends: 7216 [2021-08-21 12:06:16,213 INFO L226 Difference]: Without dead ends: 7146 [2021-08-21 12:06:16,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=188, Invalid=462, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:06:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7146 states. [2021-08-21 12:06:16,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7146 to 5081. [2021-08-21 12:06:16,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5081 states, 5080 states have (on average 2.518700787401575) internal successors, (12795), 5080 states have internal predecessors, (12795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:16,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5081 states to 5081 states and 12795 transitions. [2021-08-21 12:06:16,301 INFO L78 Accepts]: Start accepts. Automaton has 5081 states and 12795 transitions. Word has length 47 [2021-08-21 12:06:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:16,301 INFO L470 AbstractCegarLoop]: Abstraction has 5081 states and 12795 transitions. [2021-08-21 12:06:16,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 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) [2021-08-21 12:06:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 5081 states and 12795 transitions. [2021-08-21 12:06:16,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:06:16,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:16,306 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:16,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:16,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:16,507 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:16,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:16,507 INFO L82 PathProgramCache]: Analyzing trace with hash 595441160, now seen corresponding path program 43 times [2021-08-21 12:06:16,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:16,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093316442] [2021-08-21 12:06:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:16,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:16,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:16,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093316442] [2021-08-21 12:06:16,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093316442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:16,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837981170] [2021-08-21 12:06:16,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:16,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:16,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:16,645 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) [2021-08-21 12:06:16,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-21 12:06:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:20,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:06:20,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:21,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837981170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:21,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:21,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:06:21,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034460475] [2021-08-21 12:06:21,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:06:21,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:21,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:06:21,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:06:21,054 INFO L87 Difference]: Start difference. First operand 5081 states and 12795 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) [2021-08-21 12:06:21,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:21,251 INFO L93 Difference]: Finished difference Result 7811 states and 19060 transitions. [2021-08-21 12:06:21,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:06:21,252 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 47 [2021-08-21 12:06:21,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:21,265 INFO L225 Difference]: With dead ends: 7811 [2021-08-21 12:06:21,265 INFO L226 Difference]: Without dead ends: 7811 [2021-08-21 12:06:21,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:06:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7811 states. [2021-08-21 12:06:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7811 to 5698. [2021-08-21 12:06:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5698 states, 5697 states have (on average 2.5803054239073195) internal successors, (14700), 5697 states have internal predecessors, (14700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:21,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5698 states to 5698 states and 14700 transitions. [2021-08-21 12:06:21,370 INFO L78 Accepts]: Start accepts. Automaton has 5698 states and 14700 transitions. Word has length 47 [2021-08-21 12:06:21,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:21,370 INFO L470 AbstractCegarLoop]: Abstraction has 5698 states and 14700 transitions. [2021-08-21 12:06:21,370 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) [2021-08-21 12:06:21,370 INFO L276 IsEmpty]: Start isEmpty. Operand 5698 states and 14700 transitions. [2021-08-21 12:06:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:06:21,376 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:21,376 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:21,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2021-08-21 12:06:21,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:21,577 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:21,577 INFO L82 PathProgramCache]: Analyzing trace with hash 61575784, now seen corresponding path program 97 times [2021-08-21 12:06:21,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:21,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783351186] [2021-08-21 12:06:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:21,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:06:21,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:21,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783351186] [2021-08-21 12:06:21,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783351186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:21,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962900932] [2021-08-21 12:06:21,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:06:21,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:21,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:21,706 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) [2021-08-21 12:06:21,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-21 12:06:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:25,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:06:25,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:26,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962900932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:26,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:26,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:06:26,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779693528] [2021-08-21 12:06:26,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:06:26,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:26,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:06:26,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:06:26,177 INFO L87 Difference]: Start difference. First operand 5698 states and 14700 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) [2021-08-21 12:06:26,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:26,402 INFO L93 Difference]: Finished difference Result 6122 states and 15492 transitions. [2021-08-21 12:06:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:06:26,403 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 47 [2021-08-21 12:06:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:26,415 INFO L225 Difference]: With dead ends: 6122 [2021-08-21 12:06:26,416 INFO L226 Difference]: Without dead ends: 6116 [2021-08-21 12:06:26,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:06:26,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2021-08-21 12:06:26,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 5587. [2021-08-21 12:06:26,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5587 states, 5586 states have (on average 2.5698174006444683) internal successors, (14355), 5586 states have internal predecessors, (14355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 14355 transitions. [2021-08-21 12:06:26,509 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 14355 transitions. Word has length 47 [2021-08-21 12:06:26,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:26,510 INFO L470 AbstractCegarLoop]: Abstraction has 5587 states and 14355 transitions. [2021-08-21 12:06:26,510 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) [2021-08-21 12:06:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 14355 transitions. [2021-08-21 12:06:26,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:06:26,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:26,516 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:26,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:26,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:26,716 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:26,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:26,716 INFO L82 PathProgramCache]: Analyzing trace with hash -243997515, now seen corresponding path program 44 times [2021-08-21 12:06:26,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:26,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161934170] [2021-08-21 12:06:26,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:26,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:06:26,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:26,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161934170] [2021-08-21 12:06:26,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161934170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:26,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840860435] [2021-08-21 12:06:26,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:26,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:26,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:26,853 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) [2021-08-21 12:06:26,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-21 12:06:31,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:31,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:31,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:06:31,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:06:31,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840860435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:31,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:31,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:06:31,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236415430] [2021-08-21 12:06:31,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:06:31,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:31,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:06:31,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:06:31,285 INFO L87 Difference]: Start difference. First operand 5587 states and 14355 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) [2021-08-21 12:06:31,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:31,662 INFO L93 Difference]: Finished difference Result 6761 states and 16684 transitions. [2021-08-21 12:06:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:06:31,663 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 [2021-08-21 12:06:31,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:31,674 INFO L225 Difference]: With dead ends: 6761 [2021-08-21 12:06:31,675 INFO L226 Difference]: Without dead ends: 6723 [2021-08-21 12:06:31,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:31,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6723 states. [2021-08-21 12:06:31,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6723 to 5678. [2021-08-21 12:06:31,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5678 states, 5677 states have (on average 2.5657917914391404) internal successors, (14566), 5677 states have internal predecessors, (14566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5678 states to 5678 states and 14566 transitions. [2021-08-21 12:06:31,769 INFO L78 Accepts]: Start accepts. Automaton has 5678 states and 14566 transitions. Word has length 47 [2021-08-21 12:06:31,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:31,769 INFO L470 AbstractCegarLoop]: Abstraction has 5678 states and 14566 transitions. [2021-08-21 12:06:31,769 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) [2021-08-21 12:06:31,769 INFO L276 IsEmpty]: Start isEmpty. Operand 5678 states and 14566 transitions. [2021-08-21 12:06:31,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:06:31,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:31,775 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:31,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2021-08-21 12:06:31,976 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,SelfDestructingSolverStorable200 [2021-08-21 12:06:31,976 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:31,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:31,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1797694372, now seen corresponding path program 98 times [2021-08-21 12:06:31,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:31,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823073936] [2021-08-21 12:06:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:31,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:32,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:32,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823073936] [2021-08-21 12:06:32,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823073936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:32,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415629419] [2021-08-21 12:06:32,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:06:32,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:32,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:32,091 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) [2021-08-21 12:06:32,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-21 12:06:36,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:06:36,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:36,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:06:36,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:06:36,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415629419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:36,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:36,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:06:36,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526981423] [2021-08-21 12:06:36,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:06:36,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:36,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:06:36,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:06:36,674 INFO L87 Difference]: Start difference. First operand 5678 states and 14566 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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) [2021-08-21 12:06:36,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:36,868 INFO L93 Difference]: Finished difference Result 6540 states and 16162 transitions. [2021-08-21 12:06:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:06:36,869 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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 47 [2021-08-21 12:06:36,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:36,880 INFO L225 Difference]: With dead ends: 6540 [2021-08-21 12:06:36,880 INFO L226 Difference]: Without dead ends: 6537 [2021-08-21 12:06:36,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:06:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6537 states. [2021-08-21 12:06:36,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6537 to 5658. [2021-08-21 12:06:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5658 states, 5657 states have (on average 2.5624889517412055) internal successors, (14496), 5657 states have internal predecessors, (14496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5658 states to 5658 states and 14496 transitions. [2021-08-21 12:06:37,009 INFO L78 Accepts]: Start accepts. Automaton has 5658 states and 14496 transitions. Word has length 47 [2021-08-21 12:06:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:37,010 INFO L470 AbstractCegarLoop]: Abstraction has 5658 states and 14496 transitions. [2021-08-21 12:06:37,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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) [2021-08-21 12:06:37,010 INFO L276 IsEmpty]: Start isEmpty. Operand 5658 states and 14496 transitions. [2021-08-21 12:06:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:06:37,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:37,015 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:37,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:37,216 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,SelfDestructingSolverStorable201 [2021-08-21 12:06:37,216 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:37,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:37,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1590631806, now seen corresponding path program 99 times [2021-08-21 12:06:37,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:37,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428705084] [2021-08-21 12:06:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:37,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:37,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:37,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428705084] [2021-08-21 12:06:37,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428705084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:37,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55760183] [2021-08-21 12:06:37,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:06:37,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:37,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:37,337 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) [2021-08-21 12:06:37,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-21 12:06:41,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:06:41,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:41,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:06:41,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:06:41,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55760183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:41,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:41,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:06:41,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108912309] [2021-08-21 12:06:41,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:06:41,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:41,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:06:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:06:41,878 INFO L87 Difference]: Start difference. First operand 5658 states and 14496 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-08-21 12:06:42,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:42,097 INFO L93 Difference]: Finished difference Result 6550 states and 16131 transitions. [2021-08-21 12:06:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:06:42,097 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 [2021-08-21 12:06:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:42,109 INFO L225 Difference]: With dead ends: 6550 [2021-08-21 12:06:42,109 INFO L226 Difference]: Without dead ends: 6532 [2021-08-21 12:06:42,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:06:42,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6532 states. [2021-08-21 12:06:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6532 to 5658. [2021-08-21 12:06:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5658 states, 5657 states have (on average 2.5607212303340994) internal successors, (14486), 5657 states have internal predecessors, (14486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5658 states to 5658 states and 14486 transitions. [2021-08-21 12:06:42,200 INFO L78 Accepts]: Start accepts. Automaton has 5658 states and 14486 transitions. Word has length 47 [2021-08-21 12:06:42,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:42,200 INFO L470 AbstractCegarLoop]: Abstraction has 5658 states and 14486 transitions. [2021-08-21 12:06:42,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-08-21 12:06:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 5658 states and 14486 transitions. [2021-08-21 12:06:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:06:42,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:42,206 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:42,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:42,407 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,SelfDestructingSolverStorable202 [2021-08-21 12:06:42,407 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:42,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:42,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1256335477, now seen corresponding path program 100 times [2021-08-21 12:06:42,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:42,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995432467] [2021-08-21 12:06:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:42,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:06:42,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:42,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995432467] [2021-08-21 12:06:42,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995432467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:42,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920654884] [2021-08-21 12:06:42,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:06:42,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:42,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:42,543 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) [2021-08-21 12:06:42,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-21 12:06:46,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:06:46,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:46,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:06:46,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:06:47,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920654884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:47,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:47,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:06:47,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152003264] [2021-08-21 12:06:47,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:06:47,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:47,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:06:47,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:06:47,073 INFO L87 Difference]: Start difference. First operand 5658 states and 14486 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) [2021-08-21 12:06:47,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:47,587 INFO L93 Difference]: Finished difference Result 6302 states and 15657 transitions. [2021-08-21 12:06:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:06:47,588 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 [2021-08-21 12:06:47,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:47,598 INFO L225 Difference]: With dead ends: 6302 [2021-08-21 12:06:47,598 INFO L226 Difference]: Without dead ends: 6264 [2021-08-21 12:06:47,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:47,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6264 states. [2021-08-21 12:06:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6264 to 5629. [2021-08-21 12:06:47,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5629 states, 5628 states have (on average 2.5600568585643213) internal successors, (14408), 5628 states have internal predecessors, (14408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5629 states to 5629 states and 14408 transitions. [2021-08-21 12:06:47,684 INFO L78 Accepts]: Start accepts. Automaton has 5629 states and 14408 transitions. Word has length 47 [2021-08-21 12:06:47,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:47,684 INFO L470 AbstractCegarLoop]: Abstraction has 5629 states and 14408 transitions. [2021-08-21 12:06:47,685 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) [2021-08-21 12:06:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 5629 states and 14408 transitions. [2021-08-21 12:06:47,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:06:47,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:47,690 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:47,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2021-08-21 12:06:47,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:47,891 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:47,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:47,891 INFO L82 PathProgramCache]: Analyzing trace with hash 642799297, now seen corresponding path program 101 times [2021-08-21 12:06:47,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:47,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065271849] [2021-08-21 12:06:47,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:47,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:06:48,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:48,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065271849] [2021-08-21 12:06:48,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065271849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:48,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432782317] [2021-08-21 12:06:48,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:06:48,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:48,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:48,050 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) [2021-08-21 12:06:48,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-21 12:06:52,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 12:06:52,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:52,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:06:52,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:06:52,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432782317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:52,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:52,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:06:52,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617294398] [2021-08-21 12:06:52,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:06:52,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:52,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:06:52,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:06:52,607 INFO L87 Difference]: Start difference. First operand 5629 states and 14408 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) [2021-08-21 12:06:52,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:06:52,990 INFO L93 Difference]: Finished difference Result 6534 states and 16191 transitions. [2021-08-21 12:06:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:06:52,990 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 [2021-08-21 12:06:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:06:53,002 INFO L225 Difference]: With dead ends: 6534 [2021-08-21 12:06:53,002 INFO L226 Difference]: Without dead ends: 6522 [2021-08-21 12:06:53,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:06:53,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6522 states. [2021-08-21 12:06:53,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6522 to 5631. [2021-08-21 12:06:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5631 states, 5630 states have (on average 2.5595026642984013) internal successors, (14410), 5630 states have internal predecessors, (14410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:06:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5631 states to 5631 states and 14410 transitions. [2021-08-21 12:06:53,091 INFO L78 Accepts]: Start accepts. Automaton has 5631 states and 14410 transitions. Word has length 47 [2021-08-21 12:06:53,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:06:53,091 INFO L470 AbstractCegarLoop]: Abstraction has 5631 states and 14410 transitions. [2021-08-21 12:06:53,091 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) [2021-08-21 12:06:53,091 INFO L276 IsEmpty]: Start isEmpty. Operand 5631 states and 14410 transitions. [2021-08-21 12:06:53,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:06:53,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:06:53,097 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:06:53,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2021-08-21 12:06:53,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:53,297 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:06:53,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:06:53,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1510250665, now seen corresponding path program 102 times [2021-08-21 12:06:53,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:06:53,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521807342] [2021-08-21 12:06:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:06:53,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:06:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:06:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:53,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:06:53,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521807342] [2021-08-21 12:06:53,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521807342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:53,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289769473] [2021-08-21 12:06:53,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:06:53,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:06:53,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:06:53,427 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) [2021-08-21 12:06:53,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-21 12:06:57,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 12:06:57,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:06:57,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:06:57,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:06:58,260 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-21 12:06:58,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-08-21 12:06:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 29 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:06:58,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289769473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:06:58,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:06:58,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-08-21 12:06:58,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126890288] [2021-08-21 12:06:58,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:06:58,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:06:58,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:06:58,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:06:58,327 INFO L87 Difference]: Start difference. First operand 5631 states and 14410 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 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) [2021-08-21 12:07:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:03,214 INFO L93 Difference]: Finished difference Result 10926 states and 25819 transitions. [2021-08-21 12:07:03,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-08-21 12:07:03,214 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 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 47 [2021-08-21 12:07:03,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:03,233 INFO L225 Difference]: With dead ends: 10926 [2021-08-21 12:07:03,233 INFO L226 Difference]: Without dead ends: 10894 [2021-08-21 12:07:03,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7305 ImplicationChecksByTransitivity, 3452.3ms TimeCoverageRelationStatistics Valid=3122, Invalid=16060, Unknown=0, NotChecked=0, Total=19182 [2021-08-21 12:07:03,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10894 states. [2021-08-21 12:07:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10894 to 6818. [2021-08-21 12:07:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6818 states, 6817 states have (on average 2.6130262578847) internal successors, (17813), 6817 states have internal predecessors, (17813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:03,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6818 states to 6818 states and 17813 transitions. [2021-08-21 12:07:03,381 INFO L78 Accepts]: Start accepts. Automaton has 6818 states and 17813 transitions. Word has length 47 [2021-08-21 12:07:03,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:03,381 INFO L470 AbstractCegarLoop]: Abstraction has 6818 states and 17813 transitions. [2021-08-21 12:07:03,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 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) [2021-08-21 12:07:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand 6818 states and 17813 transitions. [2021-08-21 12:07:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:07:03,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:03,388 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:03,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:03,588 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,SelfDestructingSolverStorable205 [2021-08-21 12:07:03,589 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:03,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:03,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1748312182, now seen corresponding path program 45 times [2021-08-21 12:07:03,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:03,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193908592] [2021-08-21 12:07:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:03,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:03,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:03,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193908592] [2021-08-21 12:07:03,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193908592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:03,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847986545] [2021-08-21 12:07:03,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:03,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:03,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:03,709 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) [2021-08-21 12:07:03,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-21 12:07:08,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:07:08,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:08,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:07:08,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:08,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847986545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:08,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:08,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:07:08,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520030491] [2021-08-21 12:07:08,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:07:08,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:08,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:07:08,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:07:08,426 INFO L87 Difference]: Start difference. First operand 6818 states and 17813 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) [2021-08-21 12:07:08,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:08,635 INFO L93 Difference]: Finished difference Result 9082 states and 22740 transitions. [2021-08-21 12:07:08,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:07:08,636 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 47 [2021-08-21 12:07:08,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:08,653 INFO L225 Difference]: With dead ends: 9082 [2021-08-21 12:07:08,653 INFO L226 Difference]: Without dead ends: 9074 [2021-08-21 12:07:08,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:07:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9074 states. [2021-08-21 12:07:08,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9074 to 7206. [2021-08-21 12:07:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7206 states, 7205 states have (on average 2.6352532963219986) internal successors, (18987), 7205 states have internal predecessors, (18987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7206 states to 7206 states and 18987 transitions. [2021-08-21 12:07:08,793 INFO L78 Accepts]: Start accepts. Automaton has 7206 states and 18987 transitions. Word has length 47 [2021-08-21 12:07:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:08,793 INFO L470 AbstractCegarLoop]: Abstraction has 7206 states and 18987 transitions. [2021-08-21 12:07:08,794 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) [2021-08-21 12:07:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 7206 states and 18987 transitions. [2021-08-21 12:07:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:07:08,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:08,800 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:08,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2021-08-21 12:07:09,000 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,SelfDestructingSolverStorable206 [2021-08-21 12:07:09,001 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:09,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:09,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1924774704, now seen corresponding path program 46 times [2021-08-21 12:07:09,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:09,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555566228] [2021-08-21 12:07:09,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:09,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:09,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:09,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555566228] [2021-08-21 12:07:09,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555566228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:09,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550651842] [2021-08-21 12:07:09,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:09,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:09,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:09,137 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) [2021-08-21 12:07:09,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-21 12:07:13,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:13,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:13,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:07:13,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:13,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550651842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:13,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:13,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:07:13,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103774530] [2021-08-21 12:07:13,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:07:13,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:07:13,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:07:13,856 INFO L87 Difference]: Start difference. First operand 7206 states and 18987 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) [2021-08-21 12:07:14,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:14,079 INFO L93 Difference]: Finished difference Result 10075 states and 24998 transitions. [2021-08-21 12:07:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:07:14,079 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 47 [2021-08-21 12:07:14,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:14,097 INFO L225 Difference]: With dead ends: 10075 [2021-08-21 12:07:14,097 INFO L226 Difference]: Without dead ends: 10075 [2021-08-21 12:07:14,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:07:14,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10075 states. [2021-08-21 12:07:14,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10075 to 7212. [2021-08-21 12:07:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7212 states, 7211 states have (on average 2.6345860490916655) internal successors, (18998), 7211 states have internal predecessors, (18998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7212 states to 7212 states and 18998 transitions. [2021-08-21 12:07:14,241 INFO L78 Accepts]: Start accepts. Automaton has 7212 states and 18998 transitions. Word has length 47 [2021-08-21 12:07:14,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:14,241 INFO L470 AbstractCegarLoop]: Abstraction has 7212 states and 18998 transitions. [2021-08-21 12:07:14,241 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) [2021-08-21 12:07:14,241 INFO L276 IsEmpty]: Start isEmpty. Operand 7212 states and 18998 transitions. [2021-08-21 12:07:14,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:07:14,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:14,248 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:14,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2021-08-21 12:07:14,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:14,448 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:14,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:14,448 INFO L82 PathProgramCache]: Analyzing trace with hash 287202248, now seen corresponding path program 47 times [2021-08-21 12:07:14,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:14,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144025852] [2021-08-21 12:07:14,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:14,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:14,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:14,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144025852] [2021-08-21 12:07:14,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144025852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:14,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333730964] [2021-08-21 12:07:14,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:14,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:14,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:14,640 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) [2021-08-21 12:07:14,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-21 12:07:19,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:07:19,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:19,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:07:19,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:19,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333730964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:19,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:19,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 18 [2021-08-21 12:07:19,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731065543] [2021-08-21 12:07:19,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:07:19,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:19,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:07:19,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:07:19,417 INFO L87 Difference]: Start difference. First operand 7212 states and 18998 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 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) [2021-08-21 12:07:19,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:19,769 INFO L93 Difference]: Finished difference Result 9475 states and 23549 transitions. [2021-08-21 12:07:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:07:19,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 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 47 [2021-08-21 12:07:19,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:19,785 INFO L225 Difference]: With dead ends: 9475 [2021-08-21 12:07:19,785 INFO L226 Difference]: Without dead ends: 9475 [2021-08-21 12:07:19,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 268.7ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:07:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9475 states. [2021-08-21 12:07:19,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9475 to 7083. [2021-08-21 12:07:19,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 2.6310364303868963) internal successors, (18633), 7082 states have internal predecessors, (18633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 18633 transitions. [2021-08-21 12:07:19,913 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 18633 transitions. Word has length 47 [2021-08-21 12:07:19,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:19,913 INFO L470 AbstractCegarLoop]: Abstraction has 7083 states and 18633 transitions. [2021-08-21 12:07:19,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 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) [2021-08-21 12:07:19,913 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 18633 transitions. [2021-08-21 12:07:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:07:19,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:19,920 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:19,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2021-08-21 12:07:20,120 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,SelfDestructingSolverStorable208 [2021-08-21 12:07:20,120 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:20,121 INFO L82 PathProgramCache]: Analyzing trace with hash 22308444, now seen corresponding path program 103 times [2021-08-21 12:07:20,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:20,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991875212] [2021-08-21 12:07:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:20,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:20,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:20,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991875212] [2021-08-21 12:07:20,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991875212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:20,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063321039] [2021-08-21 12:07:20,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:20,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:20,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:20,264 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) [2021-08-21 12:07:20,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-21 12:07:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:24,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:07:24,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:25,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063321039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:25,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:25,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:07:25,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278132440] [2021-08-21 12:07:25,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:07:25,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:25,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:07:25,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:07:25,162 INFO L87 Difference]: Start difference. First operand 7083 states and 18633 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) [2021-08-21 12:07:25,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:25,355 INFO L93 Difference]: Finished difference Result 7804 states and 19985 transitions. [2021-08-21 12:07:25,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:07:25,356 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 47 [2021-08-21 12:07:25,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:25,369 INFO L225 Difference]: With dead ends: 7804 [2021-08-21 12:07:25,370 INFO L226 Difference]: Without dead ends: 7786 [2021-08-21 12:07:25,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:07:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7786 states. [2021-08-21 12:07:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7786 to 7083. [2021-08-21 12:07:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 2.630048009036995) internal successors, (18626), 7082 states have internal predecessors, (18626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 18626 transitions. [2021-08-21 12:07:25,490 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 18626 transitions. Word has length 47 [2021-08-21 12:07:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:25,491 INFO L470 AbstractCegarLoop]: Abstraction has 7083 states and 18626 transitions. [2021-08-21 12:07:25,491 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) [2021-08-21 12:07:25,491 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 18626 transitions. [2021-08-21 12:07:25,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:07:25,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:25,497 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:25,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2021-08-21 12:07:25,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:25,698 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:25,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:25,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1071762469, now seen corresponding path program 48 times [2021-08-21 12:07:25,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:25,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824102221] [2021-08-21 12:07:25,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:25,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:07:25,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:25,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824102221] [2021-08-21 12:07:25,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824102221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:25,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485207197] [2021-08-21 12:07:25,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:07:25,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:25,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:25,887 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) [2021-08-21 12:07:25,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-21 12:07:30,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 12:07:30,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:30,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:07:30,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:07:30,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485207197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:30,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:30,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:07:30,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493252112] [2021-08-21 12:07:30,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:07:30,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:30,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:07:30,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:07:30,674 INFO L87 Difference]: Start difference. First operand 7083 states and 18626 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) [2021-08-21 12:07:31,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:31,086 INFO L93 Difference]: Finished difference Result 8368 states and 21235 transitions. [2021-08-21 12:07:31,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:07:31,086 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 [2021-08-21 12:07:31,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:31,101 INFO L225 Difference]: With dead ends: 8368 [2021-08-21 12:07:31,101 INFO L226 Difference]: Without dead ends: 8339 [2021-08-21 12:07:31,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:07:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8339 states. [2021-08-21 12:07:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8339 to 7212. [2021-08-21 12:07:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7212 states, 7211 states have (on average 2.627097489945916) internal successors, (18944), 7211 states have internal predecessors, (18944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:31,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7212 states to 7212 states and 18944 transitions. [2021-08-21 12:07:31,280 INFO L78 Accepts]: Start accepts. Automaton has 7212 states and 18944 transitions. Word has length 47 [2021-08-21 12:07:31,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:31,280 INFO L470 AbstractCegarLoop]: Abstraction has 7212 states and 18944 transitions. [2021-08-21 12:07:31,280 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) [2021-08-21 12:07:31,280 INFO L276 IsEmpty]: Start isEmpty. Operand 7212 states and 18944 transitions. [2021-08-21 12:07:31,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:07:31,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:31,287 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:31,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2021-08-21 12:07:31,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-08-21 12:07:31,487 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:31,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:31,487 INFO L82 PathProgramCache]: Analyzing trace with hash 428570523, now seen corresponding path program 104 times [2021-08-21 12:07:31,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:31,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245029779] [2021-08-21 12:07:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:31,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:07:31,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:31,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245029779] [2021-08-21 12:07:31,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245029779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:31,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140663499] [2021-08-21 12:07:31,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:07:31,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:31,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:31,622 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) [2021-08-21 12:07:31,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-21 12:07:36,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:07:36,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:36,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:07:36,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:07:36,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140663499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:36,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:36,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:07:36,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295632647] [2021-08-21 12:07:36,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:07:36,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:36,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:07:36,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:07:36,409 INFO L87 Difference]: Start difference. First operand 7212 states and 18944 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) [2021-08-21 12:07:36,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:36,938 INFO L93 Difference]: Finished difference Result 7881 states and 20155 transitions. [2021-08-21 12:07:36,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:07:36,938 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 [2021-08-21 12:07:36,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:36,953 INFO L225 Difference]: With dead ends: 7881 [2021-08-21 12:07:36,953 INFO L226 Difference]: Without dead ends: 7825 [2021-08-21 12:07:36,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:07:36,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7825 states. [2021-08-21 12:07:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7825 to 7180. [2021-08-21 12:07:37,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7180 states, 7179 states have (on average 2.623206574731857) internal successors, (18832), 7179 states have internal predecessors, (18832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7180 states to 7180 states and 18832 transitions. [2021-08-21 12:07:37,073 INFO L78 Accepts]: Start accepts. Automaton has 7180 states and 18832 transitions. Word has length 47 [2021-08-21 12:07:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:37,073 INFO L470 AbstractCegarLoop]: Abstraction has 7180 states and 18832 transitions. [2021-08-21 12:07:37,073 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) [2021-08-21 12:07:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 7180 states and 18832 transitions. [2021-08-21 12:07:37,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:07:37,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:37,080 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:37,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:37,280 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,SelfDestructingSolverStorable211 [2021-08-21 12:07:37,280 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:37,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:37,280 INFO L82 PathProgramCache]: Analyzing trace with hash -342265144, now seen corresponding path program 49 times [2021-08-21 12:07:37,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:37,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510940201] [2021-08-21 12:07:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:37,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:37,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:37,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510940201] [2021-08-21 12:07:37,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510940201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:37,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795591007] [2021-08-21 12:07:37,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:07:37,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:37,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:37,405 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) [2021-08-21 12:07:37,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-08-21 12:07:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:42,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:07:42,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:07:42,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795591007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:42,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:42,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:07:42,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133936269] [2021-08-21 12:07:42,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:07:42,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:42,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:07:42,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:07:42,380 INFO L87 Difference]: Start difference. First operand 7180 states and 18832 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) [2021-08-21 12:07:42,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:42,611 INFO L93 Difference]: Finished difference Result 8894 states and 22329 transitions. [2021-08-21 12:07:42,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:07:42,612 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 47 [2021-08-21 12:07:42,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:42,627 INFO L225 Difference]: With dead ends: 8894 [2021-08-21 12:07:42,627 INFO L226 Difference]: Without dead ends: 8884 [2021-08-21 12:07:42,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:07:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8884 states. [2021-08-21 12:07:42,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8884 to 7296. [2021-08-21 12:07:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7296 states, 7295 states have (on average 2.623029472241261) internal successors, (19135), 7295 states have internal predecessors, (19135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7296 states to 7296 states and 19135 transitions. [2021-08-21 12:07:42,757 INFO L78 Accepts]: Start accepts. Automaton has 7296 states and 19135 transitions. Word has length 47 [2021-08-21 12:07:42,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:42,757 INFO L470 AbstractCegarLoop]: Abstraction has 7296 states and 19135 transitions. [2021-08-21 12:07:42,757 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) [2021-08-21 12:07:42,757 INFO L276 IsEmpty]: Start isEmpty. Operand 7296 states and 19135 transitions. [2021-08-21 12:07:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:07:42,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:42,764 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:42,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:42,964 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,SelfDestructingSolverStorable212 [2021-08-21 12:07:42,964 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:42,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:42,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2063693065, now seen corresponding path program 105 times [2021-08-21 12:07:42,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:42,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975959030] [2021-08-21 12:07:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:42,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:07:43,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:43,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975959030] [2021-08-21 12:07:43,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975959030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:43,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038589375] [2021-08-21 12:07:43,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:07:43,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:43,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:43,140 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) [2021-08-21 12:07:43,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-08-21 12:07:47,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:07:47,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:47,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:07:47,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 87 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:07:48,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038589375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:48,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:48,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:07:48,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368359247] [2021-08-21 12:07:48,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:07:48,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:48,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:07:48,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:07:48,012 INFO L87 Difference]: Start difference. First operand 7296 states and 19135 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) [2021-08-21 12:07:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:48,404 INFO L93 Difference]: Finished difference Result 8352 states and 21220 transitions. [2021-08-21 12:07:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:07:48,404 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 [2021-08-21 12:07:48,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:48,418 INFO L225 Difference]: With dead ends: 8352 [2021-08-21 12:07:48,419 INFO L226 Difference]: Without dead ends: 8340 [2021-08-21 12:07:48,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:07:48,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8340 states. [2021-08-21 12:07:48,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8340 to 7303. [2021-08-21 12:07:48,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7303 states, 7302 states have (on average 2.620241029854834) internal successors, (19133), 7302 states have internal predecessors, (19133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7303 states to 7303 states and 19133 transitions. [2021-08-21 12:07:48,545 INFO L78 Accepts]: Start accepts. Automaton has 7303 states and 19133 transitions. Word has length 47 [2021-08-21 12:07:48,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:48,545 INFO L470 AbstractCegarLoop]: Abstraction has 7303 states and 19133 transitions. [2021-08-21 12:07:48,545 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) [2021-08-21 12:07:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 7303 states and 19133 transitions. [2021-08-21 12:07:48,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:07:48,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:48,551 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:48,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2021-08-21 12:07:48,752 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,SelfDestructingSolverStorable213 [2021-08-21 12:07:48,752 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:48,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:48,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1833323160, now seen corresponding path program 106 times [2021-08-21 12:07:48,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:48,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447686570] [2021-08-21 12:07:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:48,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 23 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:07:48,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:48,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447686570] [2021-08-21 12:07:48,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447686570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:48,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481557908] [2021-08-21 12:07:48,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:07:48,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:48,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:48,883 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) [2021-08-21 12:07:48,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-08-21 12:07:53,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:07:53,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:53,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:07:53,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:07:53,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481557908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:53,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:53,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:07:53,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155712059] [2021-08-21 12:07:53,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:07:53,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:53,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:07:53,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:07:53,855 INFO L87 Difference]: Start difference. First operand 7303 states and 19133 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) [2021-08-21 12:07:54,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:54,052 INFO L93 Difference]: Finished difference Result 8354 states and 21067 transitions. [2021-08-21 12:07:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:07:54,052 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 47 [2021-08-21 12:07:54,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:07:54,066 INFO L225 Difference]: With dead ends: 8354 [2021-08-21 12:07:54,067 INFO L226 Difference]: Without dead ends: 8336 [2021-08-21 12:07:54,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:07:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2021-08-21 12:07:54,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 7245. [2021-08-21 12:07:54,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7245 states, 7244 states have (on average 2.6130590833793486) internal successors, (18929), 7244 states have internal predecessors, (18929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:07:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7245 states to 7245 states and 18929 transitions. [2021-08-21 12:07:54,190 INFO L78 Accepts]: Start accepts. Automaton has 7245 states and 18929 transitions. Word has length 47 [2021-08-21 12:07:54,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:07:54,190 INFO L470 AbstractCegarLoop]: Abstraction has 7245 states and 18929 transitions. [2021-08-21 12:07:54,190 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) [2021-08-21 12:07:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand 7245 states and 18929 transitions. [2021-08-21 12:07:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:07:54,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:07:54,197 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:07:54,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2021-08-21 12:07:54,397 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,SelfDestructingSolverStorable214 [2021-08-21 12:07:54,398 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:07:54,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:07:54,398 INFO L82 PathProgramCache]: Analyzing trace with hash 165193303, now seen corresponding path program 107 times [2021-08-21 12:07:54,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:07:54,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709908962] [2021-08-21 12:07:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:07:54,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:07:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:07:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:07:54,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:07:54,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709908962] [2021-08-21 12:07:54,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709908962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:54,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534391798] [2021-08-21 12:07:54,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:07:54,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:07:54,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:07:54,530 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) [2021-08-21 12:07:54,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-08-21 12:07:59,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:07:59,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:07:59,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:07:59,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:07:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:07:59,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534391798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:07:59,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:07:59,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:07:59,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591728056] [2021-08-21 12:07:59,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:07:59,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:07:59,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:07:59,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:07:59,486 INFO L87 Difference]: Start difference. First operand 7245 states and 18929 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) [2021-08-21 12:07:59,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:07:59,985 INFO L93 Difference]: Finished difference Result 9067 states and 22634 transitions. [2021-08-21 12:07:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:07:59,986 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 [2021-08-21 12:07:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:00,001 INFO L225 Difference]: With dead ends: 9067 [2021-08-21 12:08:00,001 INFO L226 Difference]: Without dead ends: 9025 [2021-08-21 12:08:00,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:08:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9025 states. [2021-08-21 12:08:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9025 to 7248. [2021-08-21 12:08:00,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7248 states, 7247 states have (on average 2.6123913343452463) internal successors, (18932), 7247 states have internal predecessors, (18932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7248 states to 7248 states and 18932 transitions. [2021-08-21 12:08:00,137 INFO L78 Accepts]: Start accepts. Automaton has 7248 states and 18932 transitions. Word has length 47 [2021-08-21 12:08:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:00,137 INFO L470 AbstractCegarLoop]: Abstraction has 7248 states and 18932 transitions. [2021-08-21 12:08:00,137 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) [2021-08-21 12:08:00,138 INFO L276 IsEmpty]: Start isEmpty. Operand 7248 states and 18932 transitions. [2021-08-21 12:08:00,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:08:00,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:00,144 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:00,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2021-08-21 12:08:00,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:00,345 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:00,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:00,345 INFO L82 PathProgramCache]: Analyzing trace with hash -805456510, now seen corresponding path program 108 times [2021-08-21 12:08:00,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:00,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630614586] [2021-08-21 12:08:00,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:00,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:00,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:00,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630614586] [2021-08-21 12:08:00,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630614586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:00,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715553052] [2021-08-21 12:08:00,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:08:00,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:00,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:00,502 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) [2021-08-21 12:08:00,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-08-21 12:08:05,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:08:05,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:05,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:08:05,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715553052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:05,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:05,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:08:05,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202072045] [2021-08-21 12:08:05,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:08:05,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:05,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:08:05,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:08:05,541 INFO L87 Difference]: Start difference. First operand 7248 states and 18932 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) [2021-08-21 12:08:05,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:05,849 INFO L93 Difference]: Finished difference Result 8316 states and 20896 transitions. [2021-08-21 12:08:05,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:08:05,849 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 47 [2021-08-21 12:08:05,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:05,863 INFO L225 Difference]: With dead ends: 8316 [2021-08-21 12:08:05,864 INFO L226 Difference]: Without dead ends: 8292 [2021-08-21 12:08:05,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:08:05,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8292 states. [2021-08-21 12:08:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8292 to 7248. [2021-08-21 12:08:05,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7248 states, 7247 states have (on average 2.6104595004829583) internal successors, (18918), 7247 states have internal predecessors, (18918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7248 states to 7248 states and 18918 transitions. [2021-08-21 12:08:05,986 INFO L78 Accepts]: Start accepts. Automaton has 7248 states and 18918 transitions. Word has length 47 [2021-08-21 12:08:05,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:05,986 INFO L470 AbstractCegarLoop]: Abstraction has 7248 states and 18918 transitions. [2021-08-21 12:08:05,986 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) [2021-08-21 12:08:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 7248 states and 18918 transitions. [2021-08-21 12:08:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:08:05,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:05,992 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:06,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2021-08-21 12:08:06,193 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,SelfDestructingSolverStorable216 [2021-08-21 12:08:06,193 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:06,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2111788211, now seen corresponding path program 109 times [2021-08-21 12:08:06,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:06,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106601676] [2021-08-21 12:08:06,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:06,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:06,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:06,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106601676] [2021-08-21 12:08:06,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106601676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:06,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797361299] [2021-08-21 12:08:06,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:08:06,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:06,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:06,339 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) [2021-08-21 12:08:06,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-08-21 12:08:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:11,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:08:11,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:11,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797361299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:11,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:11,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:08:11,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837010067] [2021-08-21 12:08:11,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:08:11,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:11,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:08:11,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:08:11,368 INFO L87 Difference]: Start difference. First operand 7248 states and 18918 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) [2021-08-21 12:08:11,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:11,907 INFO L93 Difference]: Finished difference Result 9200 states and 22865 transitions. [2021-08-21 12:08:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:08:11,908 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 [2021-08-21 12:08:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:11,922 INFO L225 Difference]: With dead ends: 9200 [2021-08-21 12:08:11,922 INFO L226 Difference]: Without dead ends: 9146 [2021-08-21 12:08:11,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:08:11,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9146 states. [2021-08-21 12:08:12,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9146 to 7223. [2021-08-21 12:08:12,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7223 states, 7222 states have (on average 2.607034062586541) internal successors, (18828), 7222 states have internal predecessors, (18828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7223 states to 7223 states and 18828 transitions. [2021-08-21 12:08:12,049 INFO L78 Accepts]: Start accepts. Automaton has 7223 states and 18828 transitions. Word has length 47 [2021-08-21 12:08:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:12,049 INFO L470 AbstractCegarLoop]: Abstraction has 7223 states and 18828 transitions. [2021-08-21 12:08:12,049 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) [2021-08-21 12:08:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 7223 states and 18828 transitions. [2021-08-21 12:08:12,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:08:12,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:12,055 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:12,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:12,255 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,SelfDestructingSolverStorable217 [2021-08-21 12:08:12,256 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:12,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1251846284, now seen corresponding path program 50 times [2021-08-21 12:08:12,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:12,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416521534] [2021-08-21 12:08:12,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:12,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 66 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:12,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:12,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416521534] [2021-08-21 12:08:12,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416521534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:12,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663804558] [2021-08-21 12:08:12,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:12,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:12,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:12,381 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) [2021-08-21 12:08:12,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-21 12:08:17,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:17,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:17,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:17,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 74 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:17,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663804558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:17,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:17,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 12:08:17,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541226144] [2021-08-21 12:08:17,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:08:17,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:17,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:08:17,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:08:17,505 INFO L87 Difference]: Start difference. First operand 7223 states and 18828 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) [2021-08-21 12:08:17,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:17,776 INFO L93 Difference]: Finished difference Result 10686 states and 26305 transitions. [2021-08-21 12:08:17,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:08:17,776 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 47 [2021-08-21 12:08:17,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:17,794 INFO L225 Difference]: With dead ends: 10686 [2021-08-21 12:08:17,794 INFO L226 Difference]: Without dead ends: 10686 [2021-08-21 12:08:17,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:08:17,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10686 states. [2021-08-21 12:08:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10686 to 7317. [2021-08-21 12:08:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7317 states, 7316 states have (on average 2.6123564789502463) internal successors, (19112), 7316 states have internal predecessors, (19112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7317 states to 7317 states and 19112 transitions. [2021-08-21 12:08:17,932 INFO L78 Accepts]: Start accepts. Automaton has 7317 states and 19112 transitions. Word has length 47 [2021-08-21 12:08:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:17,932 INFO L470 AbstractCegarLoop]: Abstraction has 7317 states and 19112 transitions. [2021-08-21 12:08:17,932 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) [2021-08-21 12:08:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 7317 states and 19112 transitions. [2021-08-21 12:08:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:08:17,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:17,938 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:17,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2021-08-21 12:08:18,139 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,SelfDestructingSolverStorable218 [2021-08-21 12:08:18,139 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:18,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:18,139 INFO L82 PathProgramCache]: Analyzing trace with hash -385726172, now seen corresponding path program 51 times [2021-08-21 12:08:18,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:18,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186420398] [2021-08-21 12:08:18,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:18,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 65 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:18,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:18,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186420398] [2021-08-21 12:08:18,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186420398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:18,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092195176] [2021-08-21 12:08:18,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:18,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:18,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:18,277 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) [2021-08-21 12:08:18,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-21 12:08:23,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 12:08:23,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:23,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:23,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:23,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092195176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:23,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:23,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 12:08:23,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852301295] [2021-08-21 12:08:23,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:08:23,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:23,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:08:23,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:08:23,407 INFO L87 Difference]: Start difference. First operand 7317 states and 19112 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) [2021-08-21 12:08:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:23,713 INFO L93 Difference]: Finished difference Result 10564 states and 26009 transitions. [2021-08-21 12:08:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:08:23,713 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 47 [2021-08-21 12:08:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:23,733 INFO L225 Difference]: With dead ends: 10564 [2021-08-21 12:08:23,733 INFO L226 Difference]: Without dead ends: 10564 [2021-08-21 12:08:23,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:08:23,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10564 states. [2021-08-21 12:08:23,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10564 to 7325. [2021-08-21 12:08:23,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7325 states, 7324 states have (on average 2.612370289459312) internal successors, (19133), 7324 states have internal predecessors, (19133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:23,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7325 states to 7325 states and 19133 transitions. [2021-08-21 12:08:23,881 INFO L78 Accepts]: Start accepts. Automaton has 7325 states and 19133 transitions. Word has length 47 [2021-08-21 12:08:23,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:23,881 INFO L470 AbstractCegarLoop]: Abstraction has 7325 states and 19133 transitions. [2021-08-21 12:08:23,881 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) [2021-08-21 12:08:23,881 INFO L276 IsEmpty]: Start isEmpty. Operand 7325 states and 19133 transitions. [2021-08-21 12:08:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:08:23,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:23,888 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:23,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:24,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:24,088 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:24,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:24,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2075721336, now seen corresponding path program 52 times [2021-08-21 12:08:24,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:24,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647492346] [2021-08-21 12:08:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:24,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:24,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:24,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647492346] [2021-08-21 12:08:24,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647492346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:24,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169816577] [2021-08-21 12:08:24,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:24,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:24,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:24,242 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) [2021-08-21 12:08:24,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-21 12:08:29,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:08:29,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:29,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:29,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:29,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169816577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:29,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:29,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 12:08:29,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713171200] [2021-08-21 12:08:29,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:08:29,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:29,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:08:29,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:08:29,407 INFO L87 Difference]: Start difference. First operand 7325 states and 19133 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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) [2021-08-21 12:08:29,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:29,756 INFO L93 Difference]: Finished difference Result 9288 states and 23140 transitions. [2021-08-21 12:08:29,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:08:29,757 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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 47 [2021-08-21 12:08:29,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:29,774 INFO L225 Difference]: With dead ends: 9288 [2021-08-21 12:08:29,774 INFO L226 Difference]: Without dead ends: 9288 [2021-08-21 12:08:29,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 133.0ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:08:29,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9288 states. [2021-08-21 12:08:29,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9288 to 7149. [2021-08-21 12:08:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7149 states, 7148 states have (on average 2.6110800223838835) internal successors, (18664), 7148 states have internal predecessors, (18664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7149 states to 7149 states and 18664 transitions. [2021-08-21 12:08:29,910 INFO L78 Accepts]: Start accepts. Automaton has 7149 states and 18664 transitions. Word has length 47 [2021-08-21 12:08:29,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:29,910 INFO L470 AbstractCegarLoop]: Abstraction has 7149 states and 18664 transitions. [2021-08-21 12:08:29,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 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) [2021-08-21 12:08:29,910 INFO L276 IsEmpty]: Start isEmpty. Operand 7149 states and 18664 transitions. [2021-08-21 12:08:29,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:08:29,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:29,917 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:29,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2021-08-21 12:08:30,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:30,117 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:30,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:30,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1796576408, now seen corresponding path program 110 times [2021-08-21 12:08:30,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:30,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529039116] [2021-08-21 12:08:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:30,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:08:30,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:30,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529039116] [2021-08-21 12:08:30,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529039116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:30,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586019801] [2021-08-21 12:08:30,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:08:30,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:30,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:30,267 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) [2021-08-21 12:08:30,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-21 12:08:35,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:08:35,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:35,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:35,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:35,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586019801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:35,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:35,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:08:35,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53672270] [2021-08-21 12:08:35,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:08:35,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:35,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:08:35,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:08:35,447 INFO L87 Difference]: Start difference. First operand 7149 states and 18664 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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) [2021-08-21 12:08:35,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:35,669 INFO L93 Difference]: Finished difference Result 8042 states and 20331 transitions. [2021-08-21 12:08:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:08:35,669 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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 47 [2021-08-21 12:08:35,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:35,685 INFO L225 Difference]: With dead ends: 8042 [2021-08-21 12:08:35,685 INFO L226 Difference]: Without dead ends: 8003 [2021-08-21 12:08:35,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:08:35,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8003 states. [2021-08-21 12:08:35,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8003 to 7149. [2021-08-21 12:08:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7149 states, 7148 states have (on average 2.609681029658646) internal successors, (18654), 7148 states have internal predecessors, (18654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7149 states to 7149 states and 18654 transitions. [2021-08-21 12:08:35,810 INFO L78 Accepts]: Start accepts. Automaton has 7149 states and 18654 transitions. Word has length 47 [2021-08-21 12:08:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:35,810 INFO L470 AbstractCegarLoop]: Abstraction has 7149 states and 18654 transitions. [2021-08-21 12:08:35,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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) [2021-08-21 12:08:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 7149 states and 18654 transitions. [2021-08-21 12:08:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:08:35,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:35,817 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:35,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2021-08-21 12:08:36,017 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,SelfDestructingSolverStorable221 [2021-08-21 12:08:36,017 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:36,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:36,018 INFO L82 PathProgramCache]: Analyzing trace with hash 684706549, now seen corresponding path program 53 times [2021-08-21 12:08:36,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:36,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118246851] [2021-08-21 12:08:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:36,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:08:36,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:36,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118246851] [2021-08-21 12:08:36,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118246851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:36,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608395169] [2021-08-21 12:08:36,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:36,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:36,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:36,202 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) [2021-08-21 12:08:36,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-21 12:08:41,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-21 12:08:41,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:41,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:08:41,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:08:41,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608395169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:41,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:41,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:08:41,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197505036] [2021-08-21 12:08:41,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:41,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:41,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:41,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:41,375 INFO L87 Difference]: Start difference. First operand 7149 states and 18654 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) [2021-08-21 12:08:41,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:41,799 INFO L93 Difference]: Finished difference Result 8245 states and 20865 transitions. [2021-08-21 12:08:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:08:41,799 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 [2021-08-21 12:08:41,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:41,814 INFO L225 Difference]: With dead ends: 8245 [2021-08-21 12:08:41,814 INFO L226 Difference]: Without dead ends: 8221 [2021-08-21 12:08:41,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:08:41,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8221 states. [2021-08-21 12:08:41,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8221 to 7277. [2021-08-21 12:08:41,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7277 states, 7276 states have (on average 2.6065145684442) internal successors, (18965), 7276 states have internal predecessors, (18965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:41,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7277 states to 7277 states and 18965 transitions. [2021-08-21 12:08:41,938 INFO L78 Accepts]: Start accepts. Automaton has 7277 states and 18965 transitions. Word has length 47 [2021-08-21 12:08:41,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:41,939 INFO L470 AbstractCegarLoop]: Abstraction has 7277 states and 18965 transitions. [2021-08-21 12:08:41,939 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) [2021-08-21 12:08:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 7277 states and 18965 transitions. [2021-08-21 12:08:41,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:08:41,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:41,945 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:41,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2021-08-21 12:08:42,146 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,SelfDestructingSolverStorable222 [2021-08-21 12:08:42,146 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:42,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:42,146 INFO L82 PathProgramCache]: Analyzing trace with hash -868990308, now seen corresponding path program 111 times [2021-08-21 12:08:42,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:42,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126722043] [2021-08-21 12:08:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:42,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:42,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:42,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126722043] [2021-08-21 12:08:42,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126722043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:42,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104799338] [2021-08-21 12:08:42,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:08:42,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:42,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:42,265 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) [2021-08-21 12:08:42,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-21 12:08:47,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 12:08:47,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:47,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:47,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:08:47,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104799338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:47,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:47,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:08:47,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580353122] [2021-08-21 12:08:47,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:47,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:47,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:47,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:47,491 INFO L87 Difference]: Start difference. First operand 7277 states and 18965 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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) [2021-08-21 12:08:47,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:47,659 INFO L93 Difference]: Finished difference Result 8464 states and 21190 transitions. [2021-08-21 12:08:47,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:08:47,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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 47 [2021-08-21 12:08:47,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:47,673 INFO L225 Difference]: With dead ends: 8464 [2021-08-21 12:08:47,673 INFO L226 Difference]: Without dead ends: 8461 [2021-08-21 12:08:47,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:47,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8461 states. [2021-08-21 12:08:47,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8461 to 7269. [2021-08-21 12:08:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7269 states, 7268 states have (on average 2.6049807374793614) internal successors, (18933), 7268 states have internal predecessors, (18933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7269 states to 7269 states and 18933 transitions. [2021-08-21 12:08:47,802 INFO L78 Accepts]: Start accepts. Automaton has 7269 states and 18933 transitions. Word has length 47 [2021-08-21 12:08:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:47,803 INFO L470 AbstractCegarLoop]: Abstraction has 7269 states and 18933 transitions. [2021-08-21 12:08:47,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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) [2021-08-21 12:08:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 7269 states and 18933 transitions. [2021-08-21 12:08:47,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:08:47,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:47,809 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:47,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2021-08-21 12:08:48,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:48,010 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:48,010 INFO L82 PathProgramCache]: Analyzing trace with hash -661927742, now seen corresponding path program 112 times [2021-08-21 12:08:48,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:48,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263259636] [2021-08-21 12:08:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:48,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:08:48,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:48,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263259636] [2021-08-21 12:08:48,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263259636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:48,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112957350] [2021-08-21 12:08:48,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:08:48,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:48,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:48,194 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) [2021-08-21 12:08:48,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-21 12:08:53,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:08:53,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:53,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:08:53,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:08:53,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112957350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:53,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:53,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:08:53,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545521711] [2021-08-21 12:08:53,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:08:53,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:53,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:08:53,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:08:53,467 INFO L87 Difference]: Start difference. First operand 7269 states and 18933 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-08-21 12:08:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:53,659 INFO L93 Difference]: Finished difference Result 8492 states and 21207 transitions. [2021-08-21 12:08:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:08:53,659 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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 [2021-08-21 12:08:53,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:53,674 INFO L225 Difference]: With dead ends: 8492 [2021-08-21 12:08:53,674 INFO L226 Difference]: Without dead ends: 8474 [2021-08-21 12:08:53,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:08:53,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8474 states. [2021-08-21 12:08:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8474 to 7269. [2021-08-21 12:08:53,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7269 states, 7268 states have (on average 2.60305448541552) internal successors, (18919), 7268 states have internal predecessors, (18919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:08:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7269 states to 7269 states and 18919 transitions. [2021-08-21 12:08:53,807 INFO L78 Accepts]: Start accepts. Automaton has 7269 states and 18919 transitions. Word has length 47 [2021-08-21 12:08:53,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:08:53,807 INFO L470 AbstractCegarLoop]: Abstraction has 7269 states and 18919 transitions. [2021-08-21 12:08:53,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 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) [2021-08-21 12:08:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 7269 states and 18919 transitions. [2021-08-21 12:08:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:08:53,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:08:53,814 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:08:53,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2021-08-21 12:08:54,014 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,SelfDestructingSolverStorable224 [2021-08-21 12:08:54,014 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:08:54,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:08:54,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2109927755, now seen corresponding path program 113 times [2021-08-21 12:08:54,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:08:54,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155295180] [2021-08-21 12:08:54,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:08:54,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:08:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:08:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:08:54,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:08:54,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155295180] [2021-08-21 12:08:54,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155295180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:54,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898944340] [2021-08-21 12:08:54,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:08:54,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:08:54,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:08:54,152 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) [2021-08-21 12:08:54,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-21 12:08:59,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-21 12:08:59,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:08:59,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:08:59,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:08:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:08:59,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898944340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:08:59,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:08:59,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 12:08:59,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19705866] [2021-08-21 12:08:59,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:08:59,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:08:59,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:08:59,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:08:59,437 INFO L87 Difference]: Start difference. First operand 7269 states and 18919 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) [2021-08-21 12:08:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:08:59,909 INFO L93 Difference]: Finished difference Result 7850 states and 19945 transitions. [2021-08-21 12:08:59,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:08:59,910 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 [2021-08-21 12:08:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:08:59,923 INFO L225 Difference]: With dead ends: 7850 [2021-08-21 12:08:59,923 INFO L226 Difference]: Without dead ends: 7776 [2021-08-21 12:08:59,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:08:59,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7776 states. [2021-08-21 12:09:00,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7776 to 7243. [2021-08-21 12:09:00,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7243 states, 7242 states have (on average 2.5990057995029) internal successors, (18822), 7242 states have internal predecessors, (18822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7243 states to 7243 states and 18822 transitions. [2021-08-21 12:09:00,042 INFO L78 Accepts]: Start accepts. Automaton has 7243 states and 18822 transitions. Word has length 47 [2021-08-21 12:09:00,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:00,043 INFO L470 AbstractCegarLoop]: Abstraction has 7243 states and 18822 transitions. [2021-08-21 12:09:00,043 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) [2021-08-21 12:09:00,043 INFO L276 IsEmpty]: Start isEmpty. Operand 7243 states and 18822 transitions. [2021-08-21 12:09:00,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:09:00,049 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:00,049 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:00,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2021-08-21 12:09:00,250 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,SelfDestructingSolverStorable225 [2021-08-21 12:09:00,250 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:00,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:00,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1571503361, now seen corresponding path program 114 times [2021-08-21 12:09:00,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:00,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819163498] [2021-08-21 12:09:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:00,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:00,388 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:09:00,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:00,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819163498] [2021-08-21 12:09:00,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819163498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:00,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760477696] [2021-08-21 12:09:00,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:09:00,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:00,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:00,389 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) [2021-08-21 12:09:00,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-21 12:09:05,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-21 12:09:05,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:05,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:09:05,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:09:05,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760477696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:05,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:05,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-21 12:09:05,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903701677] [2021-08-21 12:09:05,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:09:05,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:05,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:09:05,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:09:05,677 INFO L87 Difference]: Start difference. First operand 7243 states and 18822 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) [2021-08-21 12:09:06,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:06,063 INFO L93 Difference]: Finished difference Result 8231 states and 20773 transitions. [2021-08-21 12:09:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:09:06,064 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 [2021-08-21 12:09:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:06,078 INFO L225 Difference]: With dead ends: 8231 [2021-08-21 12:09:06,078 INFO L226 Difference]: Without dead ends: 8219 [2021-08-21 12:09:06,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:09:06,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8219 states. [2021-08-21 12:09:06,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8219 to 7279. [2021-08-21 12:09:06,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7279 states, 7278 states have (on average 2.597829073921407) internal successors, (18907), 7278 states have internal predecessors, (18907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:06,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7279 states to 7279 states and 18907 transitions. [2021-08-21 12:09:06,206 INFO L78 Accepts]: Start accepts. Automaton has 7279 states and 18907 transitions. Word has length 47 [2021-08-21 12:09:06,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:06,206 INFO L470 AbstractCegarLoop]: Abstraction has 7279 states and 18907 transitions. [2021-08-21 12:09:06,206 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) [2021-08-21 12:09:06,206 INFO L276 IsEmpty]: Start isEmpty. Operand 7279 states and 18907 transitions. [2021-08-21 12:09:06,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:09:06,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:06,213 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:06,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:06,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-08-21 12:09:06,413 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:06,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:06,413 INFO L82 PathProgramCache]: Analyzing trace with hash -581546601, now seen corresponding path program 115 times [2021-08-21 12:09:06,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:06,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487461446] [2021-08-21 12:09:06,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:06,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:09:06,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:06,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487461446] [2021-08-21 12:09:06,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487461446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:06,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723012547] [2021-08-21 12:09:06,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:09:06,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:06,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:06,545 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:06,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-21 12:09:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:11,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:09:11,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:09:11,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723012547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:11,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:11,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-21 12:09:11,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265530417] [2021-08-21 12:09:11,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:09:11,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:11,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:09:11,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:09:11,869 INFO L87 Difference]: Start difference. First operand 7279 states and 18907 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) [2021-08-21 12:09:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:12,438 INFO L93 Difference]: Finished difference Result 9423 states and 23356 transitions. [2021-08-21 12:09:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:09:12,439 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 [2021-08-21 12:09:12,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:12,454 INFO L225 Difference]: With dead ends: 9423 [2021-08-21 12:09:12,455 INFO L226 Difference]: Without dead ends: 9369 [2021-08-21 12:09:12,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:09:12,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9369 states. [2021-08-21 12:09:12,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9369 to 7399. [2021-08-21 12:09:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7399 states, 7398 states have (on average 2.598269802649365) internal successors, (19222), 7398 states have internal predecessors, (19222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 19222 transitions. [2021-08-21 12:09:12,593 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 19222 transitions. Word has length 47 [2021-08-21 12:09:12,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:12,593 INFO L470 AbstractCegarLoop]: Abstraction has 7399 states and 19222 transitions. [2021-08-21 12:09:12,593 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) [2021-08-21 12:09:12,593 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 19222 transitions. [2021-08-21 12:09:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:09:12,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:12,600 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:12,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2021-08-21 12:09:12,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:12,800 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:12,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:12,801 INFO L82 PathProgramCache]: Analyzing trace with hash 951012508, now seen corresponding path program 116 times [2021-08-21 12:09:12,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:12,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316223935] [2021-08-21 12:09:12,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:12,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:12,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:13,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:13,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316223935] [2021-08-21 12:09:13,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316223935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:13,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047565094] [2021-08-21 12:09:13,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:09:13,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:13,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:13,010 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:13,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-21 12:09:18,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:09:18,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:18,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:09:18,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:09:18,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047565094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:18,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:18,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:09:18,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923555170] [2021-08-21 12:09:18,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:09:18,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:18,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:09:18,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:09:18,401 INFO L87 Difference]: Start difference. First operand 7399 states and 19222 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) [2021-08-21 12:09:18,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:18,644 INFO L93 Difference]: Finished difference Result 8648 states and 21534 transitions. [2021-08-21 12:09:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:09:18,644 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 47 [2021-08-21 12:09:18,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:18,659 INFO L225 Difference]: With dead ends: 8648 [2021-08-21 12:09:18,659 INFO L226 Difference]: Without dead ends: 8624 [2021-08-21 12:09:18,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:09:18,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8624 states. [2021-08-21 12:09:18,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8624 to 7399. [2021-08-21 12:09:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7399 states, 7398 states have (on average 2.5969180859691807) internal successors, (19212), 7398 states have internal predecessors, (19212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 19212 transitions. [2021-08-21 12:09:18,787 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 19212 transitions. Word has length 47 [2021-08-21 12:09:18,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:18,787 INFO L470 AbstractCegarLoop]: Abstraction has 7399 states and 19212 transitions. [2021-08-21 12:09:18,787 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) [2021-08-21 12:09:18,787 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 19212 transitions. [2021-08-21 12:09:18,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:09:18,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:18,793 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:18,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:18,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-21 12:09:18,994 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:18,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:18,994 INFO L82 PathProgramCache]: Analyzing trace with hash -426710067, now seen corresponding path program 117 times [2021-08-21 12:09:18,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:18,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443456243] [2021-08-21 12:09:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:18,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:09:19,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:19,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443456243] [2021-08-21 12:09:19,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443456243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:19,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392698273] [2021-08-21 12:09:19,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:09:19,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:19,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:19,134 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:19,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-21 12:09:24,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-21 12:09:24,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:24,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 12:09:24,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:09:24,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392698273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:24,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:24,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-21 12:09:24,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951268392] [2021-08-21 12:09:24,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:09:24,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:24,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:09:24,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:09:24,520 INFO L87 Difference]: Start difference. First operand 7399 states and 19212 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) [2021-08-21 12:09:25,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:25,303 INFO L93 Difference]: Finished difference Result 11133 states and 27127 transitions. [2021-08-21 12:09:25,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:09:25,303 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 [2021-08-21 12:09:25,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:25,322 INFO L225 Difference]: With dead ends: 11133 [2021-08-21 12:09:25,322 INFO L226 Difference]: Without dead ends: 11019 [2021-08-21 12:09:25,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 326.8ms TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:09:25,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11019 states. [2021-08-21 12:09:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11019 to 7523. [2021-08-21 12:09:25,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7523 states, 7522 states have (on average 2.597314544004254) internal successors, (19537), 7522 states have internal predecessors, (19537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7523 states to 7523 states and 19537 transitions. [2021-08-21 12:09:25,473 INFO L78 Accepts]: Start accepts. Automaton has 7523 states and 19537 transitions. Word has length 47 [2021-08-21 12:09:25,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:25,473 INFO L470 AbstractCegarLoop]: Abstraction has 7523 states and 19537 transitions. [2021-08-21 12:09:25,473 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) [2021-08-21 12:09:25,473 INFO L276 IsEmpty]: Start isEmpty. Operand 7523 states and 19537 transitions. [2021-08-21 12:09:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:09:25,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:25,480 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:25,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2021-08-21 12:09:25,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:25,680 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:25,681 INFO L82 PathProgramCache]: Analyzing trace with hash -40107390, now seen corresponding path program 118 times [2021-08-21 12:09:25,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:25,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351294366] [2021-08-21 12:09:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:25,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 22 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:25,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:25,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351294366] [2021-08-21 12:09:25,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351294366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:25,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275795598] [2021-08-21 12:09:25,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:09:25,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:25,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:25,989 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:25,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-21 12:09:31,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:09:31,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:09:31,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:09:31,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:09:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:09:31,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275795598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:31,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:09:31,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-21 12:09:31,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687800996] [2021-08-21 12:09:31,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:09:31,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:09:31,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:09:31,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:09:31,450 INFO L87 Difference]: Start difference. First operand 7523 states and 19537 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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) [2021-08-21 12:09:31,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:09:31,707 INFO L93 Difference]: Finished difference Result 8809 states and 21915 transitions. [2021-08-21 12:09:31,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:09:31,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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 47 [2021-08-21 12:09:31,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:09:31,723 INFO L225 Difference]: With dead ends: 8809 [2021-08-21 12:09:31,723 INFO L226 Difference]: Without dead ends: 8776 [2021-08-21 12:09:31,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:09:31,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8776 states. [2021-08-21 12:09:31,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8776 to 7362. [2021-08-21 12:09:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7362 states, 7361 states have (on average 2.5909523162613777) internal successors, (19072), 7361 states have internal predecessors, (19072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:09:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7362 states to 7362 states and 19072 transitions. [2021-08-21 12:09:31,846 INFO L78 Accepts]: Start accepts. Automaton has 7362 states and 19072 transitions. Word has length 47 [2021-08-21 12:09:31,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:09:31,847 INFO L470 AbstractCegarLoop]: Abstraction has 7362 states and 19072 transitions. [2021-08-21 12:09:31,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 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) [2021-08-21 12:09:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7362 states and 19072 transitions. [2021-08-21 12:09:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 12:09:31,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:09:31,853 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:09:31,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2021-08-21 12:09:32,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:32,053 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:09:32,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:09:32,054 INFO L82 PathProgramCache]: Analyzing trace with hash -486401577, now seen corresponding path program 119 times [2021-08-21 12:09:32,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:09:32,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872784948] [2021-08-21 12:09:32,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:09:32,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:09:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:09:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:09:32,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:09:32,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872784948] [2021-08-21 12:09:32,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872784948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:09:32,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666182004] [2021-08-21 12:09:32,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:09:32,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:32,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:09:32,345 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:09:32,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 12:09:35,466 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:09:35,466 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 12:09:36,480 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 12:09:36,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:36,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2021-08-21 12:09:36,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:09:36,681 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 48 with TraceHistMax 6,while executing Executor. [2021-08-21 12:09:36,682 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 12:09:36,682 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 12:09:36,686 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 12:09:36,687 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 12:09:36,690 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 12:09:36 BasicIcfg [2021-08-21 12:09:36,691 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 12:09:36,692 INFO L168 Benchmark]: Toolchain (without parser) took 719956.42 ms. Allocated memory was 206.6 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 186.5 MB in the beginning and 939.3 MB in the end (delta: -752.9 MB). Peak memory consumption was 934.3 MB. Max. memory is 8.0 GB. [2021-08-21 12:09:36,692 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 206.6 MB. Free memory was 187.6 MB in the beginning and 187.5 MB in the end (delta: 85.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:09:36,692 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.55 ms. Allocated memory is still 206.6 MB. Free memory was 186.4 MB in the beginning and 184.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 12:09:36,692 INFO L168 Benchmark]: Boogie Preprocessor took 17.36 ms. Allocated memory is still 206.6 MB. Free memory was 184.9 MB in the beginning and 183.9 MB in the end (delta: 982.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 12:09:36,693 INFO L168 Benchmark]: RCFGBuilder took 212.34 ms. Allocated memory is still 206.6 MB. Free memory was 183.9 MB in the beginning and 172.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-21 12:09:36,693 INFO L168 Benchmark]: TraceAbstraction took 719687.59 ms. Allocated memory was 206.6 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 172.2 MB in the beginning and 939.3 MB in the end (delta: -767.2 MB). Peak memory consumption was 919.6 MB. Max. memory is 8.0 GB. [2021-08-21 12:09:36,697 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 206.6 MB. Free memory was 187.6 MB in the beginning and 187.5 MB in the end (delta: 85.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 33.55 ms. Allocated memory is still 206.6 MB. Free memory was 186.4 MB in the beginning and 184.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.36 ms. Allocated memory is still 206.6 MB. Free memory was 184.9 MB in the beginning and 183.9 MB in the end (delta: 982.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 212.34 ms. Allocated memory is still 206.6 MB. Free memory was 183.9 MB in the beginning and 172.6 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 719687.59 ms. Allocated memory was 206.6 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 172.2 MB in the beginning and 939.3 MB in the end (delta: -767.2 MB). Peak memory consumption was 919.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 48 with TraceHistMax 6,while executing Executor. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 48 with TraceHistMax 6,while executing Executor. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 48 with TraceHistMax 6,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 719591.7ms, OverallIterations: 232, TraceHistogramMax: 7, EmptinessCheckTime: 965.8ms, AutomataDifference: 79255.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 43.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9737 SDtfs, 33159 SDslu, 47901 SDs, 0 SdLazy, 81209 SolverSat, 3127 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 43416.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11419 GetRequests, 7757 SyntacticMatches, 429 SemanticMatches, 3233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19039 ImplicationChecksByTransitivity, 30819.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=15912occurred in iteration=87, InterpolantAutomatonStates: 3215, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 21745.5ms AutomataMinimizationTime, 231 MinimizatonAttempts, 222413 StatesRemovedByMinimization, 228 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 639.6ms SsaConstructionTime, 3674.7ms SatisfiabilityAnalysisTime, 68442.6ms InterpolantComputationTime, 16173 NumberOfCodeBlocks, 16152 NumberOfCodeBlocksAsserted, 1121 NumberOfCheckSat, 15720 ConstructedInterpolants, 121 QuantifiedInterpolants, 104808 SizeOfPredicates, 356 NumberOfNonLiveVariables, 18366 ConjunctsInSsa, 3354 ConjunctsInUnsatCore, 453 InterpolantComputations, 11 PerfectInterpolantSequences, 7934/23244 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown