/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 15:12:02,341 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 15:12:02,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 15:12:02,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 15:12:02,418 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 [2021-08-06 15:12:02,445 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 15:12:02,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 15:12:02,446 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 15:12:02,446 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 15:12:02,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 15:12:02,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 15:12:02,449 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 15:12:02,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 15:12:02,449 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 15:12:02,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 15:12:02,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 15:12:02,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 15:12:02,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 15:12:02,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 15:12:02,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 15:12:02,450 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 15:12:02,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 15:12:02,451 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 15:12:02,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 15:12:02,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 15:12:02,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 15:12:02,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 15:12:02,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 15:12:02,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:12:02,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 15:12:02,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 15:12:02,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 15:12:02,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 15:12:02,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 15:12:02,452 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 15:12:02,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 15:12:02,452 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 15:12:02,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 15:12:02,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 15:12:02,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 15:12:02,729 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 15:12:02,730 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 15:12:02,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl [2021-08-06 15:12:02,731 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl' [2021-08-06 15:12:02,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 15:12:02,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 15:12:02,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 15:12:02,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 15:12:02,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 15:12:02,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 15:12:02,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 15:12:02,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 15:12:02,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 15:12:02,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 15:12:02,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 15:12:02,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 15:12:02,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 15:12:02,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/1) ... [2021-08-06 15:12:02,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:12:02,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:02,828 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) [2021-08-06 15:12:02,830 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 [2021-08-06 15:12:02,862 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 15:12:02,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 15:12:02,862 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 15:12:02,862 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 15:12:02,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 15:12:02,863 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 15:12:02,863 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 15:12:02,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 15:12:02,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 15:12:02,863 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 15:12:02,973 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 15:12:02,973 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 15:12:02,974 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:12:02 BoogieIcfgContainer [2021-08-06 15:12:02,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 15:12:02,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 15:12:02,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 15:12:02,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 15:12:02,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:12:02" (1/2) ... [2021-08-06 15:12:02,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6ff5ba and model type threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 03:12:02, skipping insertion in model container [2021-08-06 15:12:02,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:12:02" (2/2) ... [2021-08-06 15:12:02,979 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.bpl [2021-08-06 15:12:02,982 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 15:12:02,982 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 15:12:02,982 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 15:12:02,982 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 15:12:03,023 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 15:12:03,069 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 15:12:03,073 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 [2021-08-06 15:12:03,073 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 15:12:03,079 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 24 transitions, 64 flow [2021-08-06 15:12:03,089 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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) [2021-08-06 15:12:03,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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) [2021-08-06 15:12:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 15:12:03,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:03,094 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:03,095 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:03,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1895407217, now seen corresponding path program 1 times [2021-08-06 15:12:03,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:03,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449611416] [2021-08-06 15:12:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:03,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:03,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:03,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449611416] [2021-08-06 15:12:03,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449611416] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:03,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:03,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:12:03,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251393154] [2021-08-06 15:12:03,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:12:03,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:03,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:12:03,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:12:03,269 INFO L87 Difference]: Start difference. First operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 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) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:03,302 INFO L93 Difference]: Finished difference Result 38 states and 65 transitions. [2021-08-06 15:12:03,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:12:03,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 15:12:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:03,309 INFO L225 Difference]: With dead ends: 38 [2021-08-06 15:12:03,309 INFO L226 Difference]: Without dead ends: 38 [2021-08-06 15:12:03,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:12:03,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-06 15:12:03,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-08-06 15:12:03,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2021-08-06 15:12:03,340 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 15 [2021-08-06 15:12:03,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:03,340 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2021-08-06 15:12:03,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,341 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2021-08-06 15:12:03,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:12:03,342 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:03,342 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:03,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 15:12:03,343 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:03,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:03,346 INFO L82 PathProgramCache]: Analyzing trace with hash 161461187, now seen corresponding path program 1 times [2021-08-06 15:12:03,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:03,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607245254] [2021-08-06 15:12:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:03,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:03,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:03,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607245254] [2021-08-06 15:12:03,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607245254] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:03,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:03,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 15:12:03,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831404167] [2021-08-06 15:12:03,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:12:03,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:03,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:12:03,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:12:03,415 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:03,444 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2021-08-06 15:12:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:12:03,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 15:12:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:03,448 INFO L225 Difference]: With dead ends: 62 [2021-08-06 15:12:03,448 INFO L226 Difference]: Without dead ends: 62 [2021-08-06 15:12:03,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:12:03,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-06 15:12:03,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-08-06 15:12:03,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8644067796610169) internal successors, (110), 59 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 110 transitions. [2021-08-06 15:12:03,466 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 110 transitions. Word has length 18 [2021-08-06 15:12:03,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:03,466 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 110 transitions. [2021-08-06 15:12:03,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,466 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 110 transitions. [2021-08-06 15:12:03,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 15:12:03,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:03,468 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:03,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 15:12:03,468 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:03,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:03,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1536775877, now seen corresponding path program 1 times [2021-08-06 15:12:03,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:03,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335994936] [2021-08-06 15:12:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:03,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:12:03,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:03,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335994936] [2021-08-06 15:12:03,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335994936] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:12:03,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:12:03,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 15:12:03,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382972702] [2021-08-06 15:12:03,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:12:03,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:12:03,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:12:03,529 INFO L87 Difference]: Start difference. First operand 60 states and 110 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:03,549 INFO L93 Difference]: Finished difference Result 87 states and 157 transitions. [2021-08-06 15:12:03,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:12:03,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 15:12:03,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:03,554 INFO L225 Difference]: With dead ends: 87 [2021-08-06 15:12:03,554 INFO L226 Difference]: Without dead ends: 87 [2021-08-06 15:12:03,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:12:03,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-06 15:12:03,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2021-08-06 15:12:03,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 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) [2021-08-06 15:12:03,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2021-08-06 15:12:03,568 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 20 [2021-08-06 15:12:03,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:03,568 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2021-08-06 15:12:03,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:03,568 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2021-08-06 15:12:03,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:12:03,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:03,569 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:03,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 15:12:03,569 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:03,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:03,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1011707577, now seen corresponding path program 2 times [2021-08-06 15:12:03,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:03,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974445667] [2021-08-06 15:12:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:03,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:12:03,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:03,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974445667] [2021-08-06 15:12:03,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974445667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:03,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872178126] [2021-08-06 15:12:03,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:12:03,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:03,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:03,927 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) [2021-08-06 15:12:03,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 15:12:03,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:03,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:03,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:12:03,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:04,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872178126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:04,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:04,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 15:12:04,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140385973] [2021-08-06 15:12:04,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:12:04,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:04,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:12:04,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:12:04,912 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 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) [2021-08-06 15:12:05,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:05,210 INFO L93 Difference]: Finished difference Result 116 states and 207 transitions. [2021-08-06 15:12:05,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:12:05,211 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:12:05,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:05,211 INFO L225 Difference]: With dead ends: 116 [2021-08-06 15:12:05,211 INFO L226 Difference]: Without dead ends: 102 [2021-08-06 15:12:05,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 457.5ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:12:05,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-06 15:12:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-08-06 15:12:05,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.904109589041096) internal successors, (139), 73 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 139 transitions. [2021-08-06 15:12:05,221 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 139 transitions. Word has length 22 [2021-08-06 15:12:05,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:05,222 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 139 transitions. [2021-08-06 15:12:05,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 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) [2021-08-06 15:12:05,222 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 139 transitions. [2021-08-06 15:12:05,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:12:05,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:05,226 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:05,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:05,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:05,449 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:05,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1602763079, now seen corresponding path program 3 times [2021-08-06 15:12:05,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:05,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731232412] [2021-08-06 15:12:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:05,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:05,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:05,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731232412] [2021-08-06 15:12:05,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731232412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:05,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501413369] [2021-08-06 15:12:05,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:12:05,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:05,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:05,685 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) [2021-08-06 15:12:05,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 15:12:05,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:12:05,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:05,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:12:05,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:06,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501413369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:06,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:06,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:12:06,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047077829] [2021-08-06 15:12:06,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:12:06,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:06,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:12:06,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:12:06,487 INFO L87 Difference]: Start difference. First operand 74 states and 139 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:12:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:07,029 INFO L93 Difference]: Finished difference Result 163 states and 299 transitions. [2021-08-06 15:12:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:12:07,030 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:12:07,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:07,031 INFO L225 Difference]: With dead ends: 163 [2021-08-06 15:12:07,031 INFO L226 Difference]: Without dead ends: 149 [2021-08-06 15:12:07,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 588.7ms TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:12:07,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-06 15:12:07,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 76. [2021-08-06 15:12:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-08-06 15:12:07,034 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-08-06 15:12:07,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:07,035 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-08-06 15:12:07,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:12:07,035 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-08-06 15:12:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:12:07,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:07,035 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:07,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:07,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:07,249 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:07,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:07,249 INFO L82 PathProgramCache]: Analyzing trace with hash -995630777, now seen corresponding path program 4 times [2021-08-06 15:12:07,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:07,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536185104] [2021-08-06 15:12:07,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:07,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:07,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:07,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536185104] [2021-08-06 15:12:07,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536185104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:07,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994314096] [2021-08-06 15:12:07,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:12:07,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:07,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:07,429 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) [2021-08-06 15:12:07,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 15:12:07,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:12:07,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:07,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:12:07,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:08,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994314096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:08,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:08,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:12:08,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627789378] [2021-08-06 15:12:08,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:12:08,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:08,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:12:08,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:12:08,394 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 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) [2021-08-06 15:12:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:09,173 INFO L93 Difference]: Finished difference Result 201 states and 383 transitions. [2021-08-06 15:12:09,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 15:12:09,173 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:12:09,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:09,176 INFO L225 Difference]: With dead ends: 201 [2021-08-06 15:12:09,176 INFO L226 Difference]: Without dead ends: 169 [2021-08-06 15:12:09,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 783.5ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:12:09,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-06 15:12:09,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 76. [2021-08-06 15:12:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:09,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-08-06 15:12:09,189 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-08-06 15:12:09,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:09,189 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-08-06 15:12:09,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 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) [2021-08-06 15:12:09,189 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-08-06 15:12:09,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:12:09,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:09,191 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:09,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:09,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:09,393 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:09,393 INFO L82 PathProgramCache]: Analyzing trace with hash 2016379011, now seen corresponding path program 5 times [2021-08-06 15:12:09,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:09,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123833586] [2021-08-06 15:12:09,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:09,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:09,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:09,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123833586] [2021-08-06 15:12:09,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123833586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:09,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978667661] [2021-08-06 15:12:09,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:12:09,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:09,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:09,590 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) [2021-08-06 15:12:09,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 15:12:09,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:09,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:09,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:12:09,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:10,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978667661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:10,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:10,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:12:10,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299037814] [2021-08-06 15:12:10,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:12:10,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:10,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:12:10,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:12:10,411 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:12:10,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:10,809 INFO L93 Difference]: Finished difference Result 144 states and 270 transitions. [2021-08-06 15:12:10,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:12:10,810 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:12:10,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:10,811 INFO L225 Difference]: With dead ends: 144 [2021-08-06 15:12:10,811 INFO L226 Difference]: Without dead ends: 130 [2021-08-06 15:12:10,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 479.0ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:12:10,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-06 15:12:10,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 96. [2021-08-06 15:12:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 95 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 191 transitions. [2021-08-06 15:12:10,813 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 191 transitions. Word has length 22 [2021-08-06 15:12:10,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:10,814 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 191 transitions. [2021-08-06 15:12:10,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 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) [2021-08-06 15:12:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 191 transitions. [2021-08-06 15:12:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:12:10,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:10,814 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:10,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:11,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:11,022 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:11,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:11,022 INFO L82 PathProgramCache]: Analyzing trace with hash -582014845, now seen corresponding path program 6 times [2021-08-06 15:12:11,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:11,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771092288] [2021-08-06 15:12:11,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:11,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:11,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:11,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771092288] [2021-08-06 15:12:11,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771092288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:11,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219378061] [2021-08-06 15:12:11,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:12:11,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:11,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:11,201 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) [2021-08-06 15:12:11,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 15:12:11,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:12:11,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:11,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:12:11,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:12,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219378061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:12,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:12,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-08-06 15:12:12,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904690057] [2021-08-06 15:12:12,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:12:12,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:12,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:12:12,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:12:12,103 INFO L87 Difference]: Start difference. First operand 96 states and 191 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 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) [2021-08-06 15:12:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:12,710 INFO L93 Difference]: Finished difference Result 199 states and 389 transitions. [2021-08-06 15:12:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:12:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:12:12,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:12,711 INFO L225 Difference]: With dead ends: 199 [2021-08-06 15:12:12,711 INFO L226 Difference]: Without dead ends: 167 [2021-08-06 15:12:12,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 581.2ms TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:12:12,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-08-06 15:12:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 94. [2021-08-06 15:12:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.989247311827957) internal successors, (185), 93 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) [2021-08-06 15:12:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 185 transitions. [2021-08-06 15:12:12,714 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 185 transitions. Word has length 22 [2021-08-06 15:12:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:12,714 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 185 transitions. [2021-08-06 15:12:12,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 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) [2021-08-06 15:12:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 185 transitions. [2021-08-06 15:12:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:12:12,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:12,715 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:12,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:12,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:12,917 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:12,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:12,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1739125057, now seen corresponding path program 7 times [2021-08-06 15:12:12,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:12,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978627453] [2021-08-06 15:12:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:12,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:13,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:13,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978627453] [2021-08-06 15:12:13,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978627453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:13,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041969329] [2021-08-06 15:12:13,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:12:13,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:13,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:13,085 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) [2021-08-06 15:12:13,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 15:12:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:13,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:12:13,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:13,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041969329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:13,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:13,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:12:13,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738383220] [2021-08-06 15:12:13,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:12:13,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:13,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:12:13,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:12:13,991 INFO L87 Difference]: Start difference. First operand 94 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 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) [2021-08-06 15:12:14,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:14,356 INFO L93 Difference]: Finished difference Result 178 states and 341 transitions. [2021-08-06 15:12:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:12:14,356 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:12:14,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:14,358 INFO L225 Difference]: With dead ends: 178 [2021-08-06 15:12:14,358 INFO L226 Difference]: Without dead ends: 136 [2021-08-06 15:12:14,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 420.3ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:12:14,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-06 15:12:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 94. [2021-08-06 15:12:14,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.989247311827957) internal successors, (185), 93 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) [2021-08-06 15:12:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 185 transitions. [2021-08-06 15:12:14,367 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 185 transitions. Word has length 22 [2021-08-06 15:12:14,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:14,367 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 185 transitions. [2021-08-06 15:12:14,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 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) [2021-08-06 15:12:14,367 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 185 transitions. [2021-08-06 15:12:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:12:14,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:14,369 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:14,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:14,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:14,589 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:14,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:14,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1223751555, now seen corresponding path program 8 times [2021-08-06 15:12:14,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:14,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248870288] [2021-08-06 15:12:14,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:14,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:14,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:14,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248870288] [2021-08-06 15:12:14,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248870288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:14,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929592466] [2021-08-06 15:12:14,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:12:14,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:14,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:14,797 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) [2021-08-06 15:12:14,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 15:12:15,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:15,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:15,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:12:15,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:15,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929592466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:15,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:15,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-06 15:12:15,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141522745] [2021-08-06 15:12:15,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:12:15,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:15,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:12:15,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:12:15,692 INFO L87 Difference]: Start difference. First operand 94 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 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) [2021-08-06 15:12:16,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:16,056 INFO L93 Difference]: Finished difference Result 222 states and 426 transitions. [2021-08-06 15:12:16,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:12:16,056 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:12:16,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:16,057 INFO L225 Difference]: With dead ends: 222 [2021-08-06 15:12:16,057 INFO L226 Difference]: Without dead ends: 180 [2021-08-06 15:12:16,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 434.8ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:12:16,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-08-06 15:12:16,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 100. [2021-08-06 15:12:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 99 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 197 transitions. [2021-08-06 15:12:16,060 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 197 transitions. Word has length 22 [2021-08-06 15:12:16,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:16,060 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 197 transitions. [2021-08-06 15:12:16,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 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) [2021-08-06 15:12:16,060 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 197 transitions. [2021-08-06 15:12:16,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:16,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:16,061 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:16,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:16,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:16,277 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:16,277 INFO L82 PathProgramCache]: Analyzing trace with hash -276952247, now seen corresponding path program 9 times [2021-08-06 15:12:16,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:16,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581071444] [2021-08-06 15:12:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:16,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:12:16,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:16,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581071444] [2021-08-06 15:12:16,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581071444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:16,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512436984] [2021-08-06 15:12:16,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:12:16,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:16,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:16,441 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) [2021-08-06 15:12:16,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 15:12:16,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:12:16,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:16,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:12:16,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:17,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512436984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:17,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:17,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-08-06 15:12:17,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878313447] [2021-08-06 15:12:17,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:12:17,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:17,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:12:17,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:12:17,456 INFO L87 Difference]: Start difference. First operand 100 states and 197 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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) [2021-08-06 15:12:17,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:17,794 INFO L93 Difference]: Finished difference Result 196 states and 362 transitions. [2021-08-06 15:12:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:12:17,794 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:12:17,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:17,796 INFO L225 Difference]: With dead ends: 196 [2021-08-06 15:12:17,796 INFO L226 Difference]: Without dead ends: 142 [2021-08-06 15:12:17,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 453.0ms TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:12:17,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-06 15:12:17,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 123. [2021-08-06 15:12:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.9754098360655739) internal successors, (241), 122 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 241 transitions. [2021-08-06 15:12:17,801 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 241 transitions. Word has length 24 [2021-08-06 15:12:17,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:17,801 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 241 transitions. [2021-08-06 15:12:17,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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) [2021-08-06 15:12:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 241 transitions. [2021-08-06 15:12:17,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:17,801 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:17,801 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:17,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:18,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-06 15:12:18,007 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:18,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:18,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1905230277, now seen corresponding path program 10 times [2021-08-06 15:12:18,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:18,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112745469] [2021-08-06 15:12:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:18,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:12:18,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:18,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112745469] [2021-08-06 15:12:18,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112745469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:18,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832894871] [2021-08-06 15:12:18,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:12:18,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:18,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:18,184 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) [2021-08-06 15:12:18,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 15:12:18,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:12:18,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:18,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:12:18,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:19,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832894871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:19,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:19,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-08-06 15:12:19,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67513997] [2021-08-06 15:12:19,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:12:19,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:19,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:12:19,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:12:19,419 INFO L87 Difference]: Start difference. First operand 123 states and 241 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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) [2021-08-06 15:12:19,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:19,872 INFO L93 Difference]: Finished difference Result 183 states and 339 transitions. [2021-08-06 15:12:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:12:19,873 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:12:19,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:19,873 INFO L225 Difference]: With dead ends: 183 [2021-08-06 15:12:19,874 INFO L226 Difference]: Without dead ends: 161 [2021-08-06 15:12:19,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 602.6ms TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:12:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-06 15:12:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2021-08-06 15:12:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:19,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-08-06 15:12:19,877 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-08-06 15:12:19,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:19,877 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-08-06 15:12:19,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 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) [2021-08-06 15:12:19,877 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-08-06 15:12:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:19,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:19,877 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:19,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:20,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:20,094 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:20,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:20,094 INFO L82 PathProgramCache]: Analyzing trace with hash -310443191, now seen corresponding path program 11 times [2021-08-06 15:12:20,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:20,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170447846] [2021-08-06 15:12:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:20,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:12:20,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:20,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170447846] [2021-08-06 15:12:20,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170447846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:20,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045974589] [2021-08-06 15:12:20,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:12:20,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:20,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:20,298 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) [2021-08-06 15:12:20,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 15:12:20,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:12:20,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:20,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:12:20,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:21,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045974589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:21,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:21,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-08-06 15:12:21,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757694993] [2021-08-06 15:12:21,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:12:21,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:21,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:12:21,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:12:21,734 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 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) [2021-08-06 15:12:22,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:22,652 INFO L93 Difference]: Finished difference Result 193 states and 361 transitions. [2021-08-06 15:12:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:12:22,653 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:12:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:22,654 INFO L225 Difference]: With dead ends: 193 [2021-08-06 15:12:22,654 INFO L226 Difference]: Without dead ends: 169 [2021-08-06 15:12:22,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 946.3ms TimeCoverageRelationStatistics Valid=307, Invalid=1333, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:12:22,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-06 15:12:22,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 124. [2021-08-06 15:12:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:22,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-08-06 15:12:22,657 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-08-06 15:12:22,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:22,657 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-08-06 15:12:22,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 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) [2021-08-06 15:12:22,657 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-08-06 15:12:22,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:22,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:22,657 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:22,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-06 15:12:22,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 15:12:22,865 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:22,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:22,865 INFO L82 PathProgramCache]: Analyzing trace with hash 290399277, now seen corresponding path program 12 times [2021-08-06 15:12:22,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:22,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148284573] [2021-08-06 15:12:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:22,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:23,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:23,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148284573] [2021-08-06 15:12:23,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148284573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:23,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277334363] [2021-08-06 15:12:23,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:12:23,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:23,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:23,073 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) [2021-08-06 15:12:23,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 15:12:23,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:12:23,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:23,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:12:23,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:24,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277334363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:24,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:24,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:12:24,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586991940] [2021-08-06 15:12:24,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:12:24,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:24,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:12:24,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:12:24,282 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2021-08-06 15:12:24,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:24,599 INFO L93 Difference]: Finished difference Result 168 states and 318 transitions. [2021-08-06 15:12:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:12:24,600 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 24 [2021-08-06 15:12:24,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:24,600 INFO L225 Difference]: With dead ends: 168 [2021-08-06 15:12:24,600 INFO L226 Difference]: Without dead ends: 143 [2021-08-06 15:12:24,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 463.8ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:12:24,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-06 15:12:24,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 126. [2021-08-06 15:12:24,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.976) internal successors, (247), 125 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 247 transitions. [2021-08-06 15:12:24,603 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 247 transitions. Word has length 24 [2021-08-06 15:12:24,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:24,603 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 247 transitions. [2021-08-06 15:12:24,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2021-08-06 15:12:24,604 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2021-08-06 15:12:24,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:12:24,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:24,604 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:24,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:24,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 15:12:24,817 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:24,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:24,817 INFO L82 PathProgramCache]: Analyzing trace with hash 51506161, now seen corresponding path program 13 times [2021-08-06 15:12:24,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:24,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618902473] [2021-08-06 15:12:24,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:24,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:24,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:24,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618902473] [2021-08-06 15:12:24,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618902473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:24,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216575788] [2021-08-06 15:12:24,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:12:24,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:24,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:24,992 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) [2021-08-06 15:12:24,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 15:12:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:25,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 15:12:25,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:26,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216575788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:26,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:26,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 15:12:26,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739903511] [2021-08-06 15:12:26,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:12:26,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:26,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:12:26,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:12:26,264 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2021-08-06 15:12:26,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:26,681 INFO L93 Difference]: Finished difference Result 163 states and 308 transitions. [2021-08-06 15:12:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:12:26,682 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 24 [2021-08-06 15:12:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:26,682 INFO L225 Difference]: With dead ends: 163 [2021-08-06 15:12:26,682 INFO L226 Difference]: Without dead ends: 138 [2021-08-06 15:12:26,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 490.6ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:12:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-06 15:12:26,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2021-08-06 15:12:26,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 113 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 223 transitions. [2021-08-06 15:12:26,685 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 223 transitions. Word has length 24 [2021-08-06 15:12:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:26,685 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 223 transitions. [2021-08-06 15:12:26,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2021-08-06 15:12:26,685 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 223 transitions. [2021-08-06 15:12:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:12:26,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:26,686 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:26,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:26,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 15:12:26,893 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:26,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:26,893 INFO L82 PathProgramCache]: Analyzing trace with hash -144321993, now seen corresponding path program 14 times [2021-08-06 15:12:26,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:26,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149816543] [2021-08-06 15:12:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:26,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:27,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:27,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149816543] [2021-08-06 15:12:27,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149816543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:27,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686088907] [2021-08-06 15:12:27,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:12:27,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:27,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:27,133 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) [2021-08-06 15:12:27,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 15:12:27,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:27,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:27,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:12:27,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:28,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686088907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:28,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:28,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-06 15:12:28,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388883280] [2021-08-06 15:12:28,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:12:28,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:28,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:12:28,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:12:28,572 INFO L87 Difference]: Start difference. First operand 114 states and 223 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2021-08-06 15:12:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:29,139 INFO L93 Difference]: Finished difference Result 277 states and 529 transitions. [2021-08-06 15:12:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:12:29,139 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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 27 [2021-08-06 15:12:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:29,140 INFO L225 Difference]: With dead ends: 277 [2021-08-06 15:12:29,140 INFO L226 Difference]: Without dead ends: 263 [2021-08-06 15:12:29,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 689.4ms TimeCoverageRelationStatistics Valid=382, Invalid=1874, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:12:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-08-06 15:12:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 154. [2021-08-06 15:12:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.0588235294117645) internal successors, (315), 153 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 315 transitions. [2021-08-06 15:12:29,144 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 315 transitions. Word has length 27 [2021-08-06 15:12:29,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:29,144 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 315 transitions. [2021-08-06 15:12:29,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2021-08-06 15:12:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 315 transitions. [2021-08-06 15:12:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:12:29,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:29,144 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:29,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:29,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 15:12:29,357 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:29,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:29,357 INFO L82 PathProgramCache]: Analyzing trace with hash -193889737, now seen corresponding path program 15 times [2021-08-06 15:12:29,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:29,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496810062] [2021-08-06 15:12:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:29,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:29,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:29,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496810062] [2021-08-06 15:12:29,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496810062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:29,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278292083] [2021-08-06 15:12:29,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:12:29,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:29,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:29,583 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) [2021-08-06 15:12:29,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 15:12:30,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:12:30,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:30,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:12:30,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:31,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278292083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:31,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:31,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 15:12:31,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593409668] [2021-08-06 15:12:31,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:12:31,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:31,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:12:31,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:12:31,049 INFO L87 Difference]: Start difference. First operand 154 states and 315 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2021-08-06 15:12:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:32,265 INFO L93 Difference]: Finished difference Result 345 states and 670 transitions. [2021-08-06 15:12:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 15:12:32,265 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 27 [2021-08-06 15:12:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:32,266 INFO L225 Difference]: With dead ends: 345 [2021-08-06 15:12:32,266 INFO L226 Difference]: Without dead ends: 331 [2021-08-06 15:12:32,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 1275.0ms TimeCoverageRelationStatistics Valid=750, Invalid=4220, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 15:12:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-08-06 15:12:32,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 158. [2021-08-06 15:12:32,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:32,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-08-06 15:12:32,271 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-08-06 15:12:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:32,271 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-08-06 15:12:32,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2021-08-06 15:12:32,271 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-08-06 15:12:32,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:12:32,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:32,271 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:32,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:32,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:32,485 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1874386377, now seen corresponding path program 16 times [2021-08-06 15:12:32,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:32,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487431401] [2021-08-06 15:12:32,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:32,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:32,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:32,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487431401] [2021-08-06 15:12:32,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487431401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:32,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798063372] [2021-08-06 15:12:32,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:12:32,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:32,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:32,715 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) [2021-08-06 15:12:32,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 15:12:33,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:12:33,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:33,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:12:33,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:34,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798063372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:34,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:34,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 15:12:34,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992820114] [2021-08-06 15:12:34,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:12:34,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:34,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:12:34,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:12:34,237 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2021-08-06 15:12:35,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:35,916 INFO L93 Difference]: Finished difference Result 351 states and 699 transitions. [2021-08-06 15:12:35,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 15:12:35,916 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 27 [2021-08-06 15:12:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:35,917 INFO L225 Difference]: With dead ends: 351 [2021-08-06 15:12:35,917 INFO L226 Difference]: Without dead ends: 337 [2021-08-06 15:12:35,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2001 ImplicationChecksByTransitivity, 1554.5ms TimeCoverageRelationStatistics Valid=910, Invalid=5252, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 15:12:35,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-08-06 15:12:35,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 158. [2021-08-06 15:12:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-08-06 15:12:35,922 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-08-06 15:12:35,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:35,922 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-08-06 15:12:35,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2021-08-06 15:12:35,922 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-08-06 15:12:35,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:12:35,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:35,923 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:35,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:36,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 15:12:36,137 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:36,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:36,137 INFO L82 PathProgramCache]: Analyzing trace with hash -177812937, now seen corresponding path program 17 times [2021-08-06 15:12:36,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:36,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422262592] [2021-08-06 15:12:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:36,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:36,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:36,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422262592] [2021-08-06 15:12:36,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422262592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:36,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867677080] [2021-08-06 15:12:36,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:12:36,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:36,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:36,354 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) [2021-08-06 15:12:36,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 15:12:37,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:12:37,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:37,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:12:37,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:38,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867677080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:38,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:38,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-06 15:12:38,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607258394] [2021-08-06 15:12:38,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:12:38,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:38,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:12:38,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:12:38,225 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2021-08-06 15:12:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:41,143 INFO L93 Difference]: Finished difference Result 411 states and 807 transitions. [2021-08-06 15:12:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-06 15:12:41,143 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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 27 [2021-08-06 15:12:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:41,144 INFO L225 Difference]: With dead ends: 411 [2021-08-06 15:12:41,144 INFO L226 Difference]: Without dead ends: 366 [2021-08-06 15:12:41,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 2660.6ms TimeCoverageRelationStatistics Valid=1068, Invalid=7862, Unknown=0, NotChecked=0, Total=8930 [2021-08-06 15:12:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-08-06 15:12:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 176. [2021-08-06 15:12:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1085714285714285) internal successors, (369), 175 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 369 transitions. [2021-08-06 15:12:41,150 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 369 transitions. Word has length 27 [2021-08-06 15:12:41,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:41,150 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 369 transitions. [2021-08-06 15:12:41,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2021-08-06 15:12:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 369 transitions. [2021-08-06 15:12:41,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:12:41,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:41,150 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:41,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:41,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:41,361 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:41,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:41,362 INFO L82 PathProgramCache]: Analyzing trace with hash 887148975, now seen corresponding path program 18 times [2021-08-06 15:12:41,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:41,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300840820] [2021-08-06 15:12:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:41,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:41,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:41,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300840820] [2021-08-06 15:12:41,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300840820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:41,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987233195] [2021-08-06 15:12:41,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:12:41,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:41,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:41,597 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) [2021-08-06 15:12:41,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 15:12:42,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:12:42,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:42,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:12:42,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:43,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987233195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:43,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:43,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 15:12:43,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161361011] [2021-08-06 15:12:43,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:12:43,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:43,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:12:43,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:12:43,258 INFO L87 Difference]: Start difference. First operand 176 states and 369 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2021-08-06 15:12:44,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:44,191 INFO L93 Difference]: Finished difference Result 331 states and 647 transitions. [2021-08-06 15:12:44,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 15:12:44,191 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 27 [2021-08-06 15:12:44,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:44,192 INFO L225 Difference]: With dead ends: 331 [2021-08-06 15:12:44,192 INFO L226 Difference]: Without dead ends: 317 [2021-08-06 15:12:44,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 887.7ms TimeCoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:12:44,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-08-06 15:12:44,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 196. [2021-08-06 15:12:44,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-08-06 15:12:44,197 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-08-06 15:12:44,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:44,197 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-08-06 15:12:44,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2021-08-06 15:12:44,197 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-08-06 15:12:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:12:44,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:44,197 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:44,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:44,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:44,416 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:44,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1711244881, now seen corresponding path program 19 times [2021-08-06 15:12:44,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:44,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146787991] [2021-08-06 15:12:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:44,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:44,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:44,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146787991] [2021-08-06 15:12:44,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146787991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:44,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534807371] [2021-08-06 15:12:44,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:12:44,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:44,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:44,645 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) [2021-08-06 15:12:44,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 15:12:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:12:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:46,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534807371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:46,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:46,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-06 15:12:46,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478011237] [2021-08-06 15:12:46,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:12:46,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:46,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:12:46,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:12:46,338 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2021-08-06 15:12:47,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:47,586 INFO L93 Difference]: Finished difference Result 389 states and 772 transitions. [2021-08-06 15:12:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 15:12:47,586 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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 27 [2021-08-06 15:12:47,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:47,588 INFO L225 Difference]: With dead ends: 389 [2021-08-06 15:12:47,588 INFO L226 Difference]: Without dead ends: 357 [2021-08-06 15:12:47,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 1206.2ms TimeCoverageRelationStatistics Valid=715, Invalid=4115, Unknown=0, NotChecked=0, Total=4830 [2021-08-06 15:12:47,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-06 15:12:47,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 196. [2021-08-06 15:12:47,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-08-06 15:12:47,592 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-08-06 15:12:47,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:47,593 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-08-06 15:12:47,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2021-08-06 15:12:47,593 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-08-06 15:12:47,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:12:47,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:47,593 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:47,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:47,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:47,809 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:47,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1426612203, now seen corresponding path program 20 times [2021-08-06 15:12:47,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:47,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156882674] [2021-08-06 15:12:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:47,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:48,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:48,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156882674] [2021-08-06 15:12:48,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156882674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:48,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248850301] [2021-08-06 15:12:48,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:12:48,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:48,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:48,011 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) [2021-08-06 15:12:48,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 15:12:48,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:12:48,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:48,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:12:48,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:49,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248850301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:49,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:49,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-06 15:12:49,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432564578] [2021-08-06 15:12:49,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:12:49,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:49,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:12:49,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:12:49,734 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:12:50,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:50,771 INFO L93 Difference]: Finished difference Result 364 states and 719 transitions. [2021-08-06 15:12:50,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:12:50,771 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-08-06 15:12:50,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:50,772 INFO L225 Difference]: With dead ends: 364 [2021-08-06 15:12:50,772 INFO L226 Difference]: Without dead ends: 322 [2021-08-06 15:12:50,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1013.6ms TimeCoverageRelationStatistics Valid=520, Invalid=3020, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:12:50,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-08-06 15:12:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 198. [2021-08-06 15:12:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1370558375634516) internal successors, (421), 197 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 421 transitions. [2021-08-06 15:12:50,778 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 421 transitions. Word has length 27 [2021-08-06 15:12:50,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:50,778 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 421 transitions. [2021-08-06 15:12:50,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:12:50,778 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 421 transitions. [2021-08-06 15:12:50,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:12:50,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:50,779 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:50,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:50,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:50,985 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:50,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:50,985 INFO L82 PathProgramCache]: Analyzing trace with hash 648255859, now seen corresponding path program 21 times [2021-08-06 15:12:50,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:50,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828572370] [2021-08-06 15:12:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:50,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:51,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:51,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828572370] [2021-08-06 15:12:51,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828572370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:51,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961146512] [2021-08-06 15:12:51,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:12:51,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:51,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:51,211 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) [2021-08-06 15:12:51,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 15:12:52,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:12:52,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:52,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:12:52,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:53,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961146512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:53,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:53,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 15:12:53,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388592486] [2021-08-06 15:12:53,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:12:53,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:53,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:12:53,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:12:53,057 INFO L87 Difference]: Start difference. First operand 198 states and 421 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2021-08-06 15:12:54,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:54,075 INFO L93 Difference]: Finished difference Result 410 states and 841 transitions. [2021-08-06 15:12:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 15:12:54,075 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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 27 [2021-08-06 15:12:54,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:54,076 INFO L225 Difference]: With dead ends: 410 [2021-08-06 15:12:54,076 INFO L226 Difference]: Without dead ends: 396 [2021-08-06 15:12:54,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 979.0ms TimeCoverageRelationStatistics Valid=545, Invalid=2877, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 15:12:54,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-08-06 15:12:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 258. [2021-08-06 15:12:54,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.2140077821011674) internal successors, (569), 257 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 569 transitions. [2021-08-06 15:12:54,084 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 569 transitions. Word has length 27 [2021-08-06 15:12:54,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:54,084 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 569 transitions. [2021-08-06 15:12:54,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 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) [2021-08-06 15:12:54,084 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 569 transitions. [2021-08-06 15:12:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:12:54,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:54,085 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:54,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:54,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-06 15:12:54,289 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:54,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1950137997, now seen corresponding path program 22 times [2021-08-06 15:12:54,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:54,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497436422] [2021-08-06 15:12:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:54,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:54,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:54,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497436422] [2021-08-06 15:12:54,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497436422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:54,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858148479] [2021-08-06 15:12:54,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:12:54,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:54,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:54,516 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) [2021-08-06 15:12:54,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 15:12:55,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:12:55,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:55,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:12:55,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:12:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:56,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858148479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:56,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:12:56,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-06 15:12:56,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84551768] [2021-08-06 15:12:56,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:12:56,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:12:56,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:12:56,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:12:56,322 INFO L87 Difference]: Start difference. First operand 258 states and 569 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2021-08-06 15:12:57,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:12:57,939 INFO L93 Difference]: Finished difference Result 464 states and 961 transitions. [2021-08-06 15:12:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 15:12:57,939 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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 27 [2021-08-06 15:12:57,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:12:57,941 INFO L225 Difference]: With dead ends: 464 [2021-08-06 15:12:57,941 INFO L226 Difference]: Without dead ends: 432 [2021-08-06 15:12:57,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 1390.3ms TimeCoverageRelationStatistics Valid=803, Invalid=4747, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 15:12:57,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-08-06 15:12:57,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 230. [2021-08-06 15:12:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1790393013100435) internal successors, (499), 229 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:12:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 499 transitions. [2021-08-06 15:12:57,945 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 499 transitions. Word has length 27 [2021-08-06 15:12:57,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:12:57,945 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 499 transitions. [2021-08-06 15:12:57,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2021-08-06 15:12:57,945 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 499 transitions. [2021-08-06 15:12:57,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:12:57,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:12:57,946 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:12:57,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 15:12:58,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-06 15:12:58,168 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:12:58,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:12:58,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1187719087, now seen corresponding path program 23 times [2021-08-06 15:12:58,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:12:58,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458194823] [2021-08-06 15:12:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:12:58,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:12:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:12:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:12:58,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:12:58,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458194823] [2021-08-06 15:12:58,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458194823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:12:58,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957345907] [2021-08-06 15:12:58,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:12:58,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:12:58,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:12:58,388 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) [2021-08-06 15:12:58,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 15:12:59,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:12:59,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:12:59,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:12:59,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:00,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957345907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:00,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:00,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-06 15:13:00,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671994343] [2021-08-06 15:13:00,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:13:00,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:00,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:13:00,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:13:00,160 INFO L87 Difference]: Start difference. First operand 230 states and 499 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:13:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:01,183 INFO L93 Difference]: Finished difference Result 459 states and 944 transitions. [2021-08-06 15:13:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:13:01,183 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-08-06 15:13:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:01,184 INFO L225 Difference]: With dead ends: 459 [2021-08-06 15:13:01,185 INFO L226 Difference]: Without dead ends: 414 [2021-08-06 15:13:01,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 994.8ms TimeCoverageRelationStatistics Valid=538, Invalid=2884, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 15:13:01,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-06 15:13:01,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 210. [2021-08-06 15:13:01,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.148325358851675) internal successors, (449), 209 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:01,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 449 transitions. [2021-08-06 15:13:01,189 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 449 transitions. Word has length 27 [2021-08-06 15:13:01,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:01,189 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 449 transitions. [2021-08-06 15:13:01,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:13:01,189 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 449 transitions. [2021-08-06 15:13:01,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:01,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:01,189 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:01,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:01,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:01,409 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:01,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:01,409 INFO L82 PathProgramCache]: Analyzing trace with hash -144371597, now seen corresponding path program 24 times [2021-08-06 15:13:01,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:01,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165876139] [2021-08-06 15:13:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:01,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:01,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:01,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165876139] [2021-08-06 15:13:01,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165876139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:01,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852659127] [2021-08-06 15:13:01,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:13:01,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:01,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:01,650 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) [2021-08-06 15:13:01,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 15:13:02,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:13:02,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:02,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:13:02,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:03,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852659127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:03,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:03,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-06 15:13:03,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050704755] [2021-08-06 15:13:03,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:13:03,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:03,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:13:03,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:13:03,539 INFO L87 Difference]: Start difference. First operand 210 states and 449 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:13:04,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:04,772 INFO L93 Difference]: Finished difference Result 504 states and 1024 transitions. [2021-08-06 15:13:04,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 15:13:04,772 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-08-06 15:13:04,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:04,773 INFO L225 Difference]: With dead ends: 504 [2021-08-06 15:13:04,773 INFO L226 Difference]: Without dead ends: 462 [2021-08-06 15:13:04,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1104.1ms TimeCoverageRelationStatistics Valid=628, Invalid=3404, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:13:04,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-08-06 15:13:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 186. [2021-08-06 15:13:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.1135135135135137) internal successors, (391), 185 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 391 transitions. [2021-08-06 15:13:04,777 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 391 transitions. Word has length 27 [2021-08-06 15:13:04,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:04,777 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 391 transitions. [2021-08-06 15:13:04,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:13:04,778 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 391 transitions. [2021-08-06 15:13:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:04,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:04,778 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:04,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:04,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:04,993 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:04,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:04,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1153733039, now seen corresponding path program 25 times [2021-08-06 15:13:04,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:04,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730067750] [2021-08-06 15:13:04,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:04,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:05,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:05,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730067750] [2021-08-06 15:13:05,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730067750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:05,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558830696] [2021-08-06 15:13:05,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:13:05,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:05,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:05,179 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) [2021-08-06 15:13:05,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 15:13:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:06,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:13:06,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:07,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558830696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:07,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:07,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-06 15:13:07,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950222365] [2021-08-06 15:13:07,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:13:07,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:07,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:13:07,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:13:07,221 INFO L87 Difference]: Start difference. First operand 186 states and 391 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:13:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:08,163 INFO L93 Difference]: Finished difference Result 537 states and 1060 transitions. [2021-08-06 15:13:08,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 15:13:08,168 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-08-06 15:13:08,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:08,170 INFO L225 Difference]: With dead ends: 537 [2021-08-06 15:13:08,170 INFO L226 Difference]: Without dead ends: 523 [2021-08-06 15:13:08,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 917.7ms TimeCoverageRelationStatistics Valid=477, Invalid=2829, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:13:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-08-06 15:13:08,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 267. [2021-08-06 15:13:08,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.206766917293233) internal successors, (587), 266 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:08,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 587 transitions. [2021-08-06 15:13:08,175 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 587 transitions. Word has length 27 [2021-08-06 15:13:08,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:08,175 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 587 transitions. [2021-08-06 15:13:08,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:13:08,175 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 587 transitions. [2021-08-06 15:13:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:08,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:08,175 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:08,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:08,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 15:13:08,389 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:08,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1444660817, now seen corresponding path program 26 times [2021-08-06 15:13:08,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:08,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602396387] [2021-08-06 15:13:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:08,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:08,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:08,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602396387] [2021-08-06 15:13:08,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602396387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:08,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585637295] [2021-08-06 15:13:08,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:13:08,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:08,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:08,573 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) [2021-08-06 15:13:08,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 15:13:09,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:13:09,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:09,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:13:09,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:10,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585637295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:10,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:10,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-06 15:13:10,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807465584] [2021-08-06 15:13:10,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:13:10,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:10,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:13:10,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:13:10,575 INFO L87 Difference]: Start difference. First operand 267 states and 587 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:12,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:12,220 INFO L93 Difference]: Finished difference Result 602 states and 1204 transitions. [2021-08-06 15:13:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 15:13:12,220 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-08-06 15:13:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:12,222 INFO L225 Difference]: With dead ends: 602 [2021-08-06 15:13:12,222 INFO L226 Difference]: Without dead ends: 582 [2021-08-06 15:13:12,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 1366.6ms TimeCoverageRelationStatistics Valid=785, Invalid=4765, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 15:13:12,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-08-06 15:13:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 267. [2021-08-06 15:13:12,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.206766917293233) internal successors, (587), 266 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:12,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 587 transitions. [2021-08-06 15:13:12,227 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 587 transitions. Word has length 27 [2021-08-06 15:13:12,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:12,227 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 587 transitions. [2021-08-06 15:13:12,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:12,227 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 587 transitions. [2021-08-06 15:13:12,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:12,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:12,228 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:12,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:12,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 15:13:12,438 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:12,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:12,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1693196267, now seen corresponding path program 27 times [2021-08-06 15:13:12,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:12,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784584003] [2021-08-06 15:13:12,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:12,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:12,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:12,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784584003] [2021-08-06 15:13:12,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784584003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:12,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130832480] [2021-08-06 15:13:12,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:13:12,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:12,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:12,659 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) [2021-08-06 15:13:12,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 15:13:13,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:13:13,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:13,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:13:13,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:14,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130832480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:14,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:14,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-06 15:13:14,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162916445] [2021-08-06 15:13:14,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:13:14,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:14,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:13:14,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:13:14,729 INFO L87 Difference]: Start difference. First operand 267 states and 587 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:16,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:16,249 INFO L93 Difference]: Finished difference Result 653 states and 1315 transitions. [2021-08-06 15:13:16,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 15:13:16,249 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-08-06 15:13:16,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:16,251 INFO L225 Difference]: With dead ends: 653 [2021-08-06 15:13:16,251 INFO L226 Difference]: Without dead ends: 617 [2021-08-06 15:13:16,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1305.9ms TimeCoverageRelationStatistics Valid=769, Invalid=4487, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 15:13:16,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-08-06 15:13:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 265. [2021-08-06 15:13:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.1856060606060606) internal successors, (577), 264 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:16,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 577 transitions. [2021-08-06 15:13:16,256 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 577 transitions. Word has length 27 [2021-08-06 15:13:16,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:16,256 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 577 transitions. [2021-08-06 15:13:16,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:16,256 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 577 transitions. [2021-08-06 15:13:16,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:16,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:16,257 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:16,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:16,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 15:13:16,462 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:16,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:16,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1820958903, now seen corresponding path program 28 times [2021-08-06 15:13:16,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:16,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831370423] [2021-08-06 15:13:16,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:16,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:13:16,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:16,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831370423] [2021-08-06 15:13:16,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831370423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:16,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419559168] [2021-08-06 15:13:16,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:13:16,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:16,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:16,654 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) [2021-08-06 15:13:16,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 15:13:17,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:13:17,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:17,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:13:17,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:18,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419559168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:18,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:18,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-06 15:13:18,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153364373] [2021-08-06 15:13:18,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:13:18,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:18,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:13:18,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:13:18,806 INFO L87 Difference]: Start difference. First operand 265 states and 577 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:13:19,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:19,281 INFO L93 Difference]: Finished difference Result 389 states and 799 transitions. [2021-08-06 15:13:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:13:19,281 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-08-06 15:13:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:19,282 INFO L225 Difference]: With dead ends: 389 [2021-08-06 15:13:19,283 INFO L226 Difference]: Without dead ends: 375 [2021-08-06 15:13:19,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 568.0ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:13:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-08-06 15:13:19,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 277. [2021-08-06 15:13:19,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:19,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-08-06 15:13:19,287 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 27 [2021-08-06 15:13:19,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:19,287 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-08-06 15:13:19,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:13:19,287 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-08-06 15:13:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:19,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:19,287 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:19,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:19,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:19,505 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:19,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:19,505 INFO L82 PathProgramCache]: Analyzing trace with hash 140462263, now seen corresponding path program 29 times [2021-08-06 15:13:19,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:19,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245687979] [2021-08-06 15:13:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:19,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:13:19,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:19,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245687979] [2021-08-06 15:13:19,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245687979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:19,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802049260] [2021-08-06 15:13:19,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:13:19,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:19,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:19,712 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) [2021-08-06 15:13:19,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 15:13:21,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:13:21,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:21,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:13:21,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:21,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802049260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:21,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:21,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-06 15:13:21,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690562613] [2021-08-06 15:13:21,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:13:21,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:21,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:13:21,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:13:21,971 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2021-08-06 15:13:22,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:22,863 INFO L93 Difference]: Finished difference Result 464 states and 955 transitions. [2021-08-06 15:13:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:13:22,864 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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 27 [2021-08-06 15:13:22,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:22,865 INFO L225 Difference]: With dead ends: 464 [2021-08-06 15:13:22,865 INFO L226 Difference]: Without dead ends: 450 [2021-08-06 15:13:22,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 886.5ms TimeCoverageRelationStatistics Valid=429, Invalid=2541, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 15:13:22,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-06 15:13:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 279. [2021-08-06 15:13:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.197841726618705) internal successors, (611), 278 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 611 transitions. [2021-08-06 15:13:22,870 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 611 transitions. Word has length 27 [2021-08-06 15:13:22,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:22,870 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 611 transitions. [2021-08-06 15:13:22,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2021-08-06 15:13:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 611 transitions. [2021-08-06 15:13:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:22,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:22,870 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:22,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:23,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:23,081 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1837035703, now seen corresponding path program 30 times [2021-08-06 15:13:23,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:23,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128202310] [2021-08-06 15:13:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:23,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:13:23,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:23,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128202310] [2021-08-06 15:13:23,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128202310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:23,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177521925] [2021-08-06 15:13:23,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:13:23,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:23,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:23,290 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) [2021-08-06 15:13:23,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 15:13:24,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:13:24,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:24,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:13:24,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:25,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177521925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:25,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:25,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-06 15:13:25,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508639430] [2021-08-06 15:13:25,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:13:25,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:25,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:13:25,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:13:25,560 INFO L87 Difference]: Start difference. First operand 279 states and 611 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:26,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:26,779 INFO L93 Difference]: Finished difference Result 543 states and 1114 transitions. [2021-08-06 15:13:26,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:13:26,780 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-08-06 15:13:26,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:26,781 INFO L225 Difference]: With dead ends: 543 [2021-08-06 15:13:26,781 INFO L226 Difference]: Without dead ends: 511 [2021-08-06 15:13:26,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 1132.7ms TimeCoverageRelationStatistics Valid=547, Invalid=3485, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:13:26,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-08-06 15:13:26,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 277. [2021-08-06 15:13:26,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-08-06 15:13:26,787 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 27 [2021-08-06 15:13:26,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:26,787 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-08-06 15:13:26,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:26,787 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-08-06 15:13:26,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:26,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:26,788 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:26,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:27,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:27,009 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:27,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1093541423, now seen corresponding path program 31 times [2021-08-06 15:13:27,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:27,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824350421] [2021-08-06 15:13:27,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:27,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:13:27,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:27,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824350421] [2021-08-06 15:13:27,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824350421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:27,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126054321] [2021-08-06 15:13:27,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:13:27,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:27,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:27,205 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) [2021-08-06 15:13:27,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 15:13:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:28,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:13:28,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:29,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126054321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:29,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:29,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-06 15:13:29,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174371122] [2021-08-06 15:13:29,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:13:29,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:29,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:13:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:13:29,520 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:30,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:30,457 INFO L93 Difference]: Finished difference Result 491 states and 1033 transitions. [2021-08-06 15:13:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:13:30,457 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-08-06 15:13:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:30,459 INFO L225 Difference]: With dead ends: 491 [2021-08-06 15:13:30,459 INFO L226 Difference]: Without dead ends: 449 [2021-08-06 15:13:30,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 863.7ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:13:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-08-06 15:13:30,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 277. [2021-08-06 15:13:30,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.1920289855072466) internal successors, (605), 276 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 605 transitions. [2021-08-06 15:13:30,463 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 605 transitions. Word has length 27 [2021-08-06 15:13:30,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:30,463 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 605 transitions. [2021-08-06 15:13:30,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:30,463 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 605 transitions. [2021-08-06 15:13:30,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:30,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:30,464 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:30,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:30,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-06 15:13:30,684 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:30,685 INFO L82 PathProgramCache]: Analyzing trace with hash -778012489, now seen corresponding path program 32 times [2021-08-06 15:13:30,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:30,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649880026] [2021-08-06 15:13:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:30,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:13:30,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:30,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649880026] [2021-08-06 15:13:30,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649880026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:30,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438185905] [2021-08-06 15:13:30,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:13:30,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:30,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:30,871 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) [2021-08-06 15:13:30,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 15:13:32,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:13:32,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:32,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:13:32,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:33,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438185905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:33,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:33,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-06 15:13:33,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116934918] [2021-08-06 15:13:33,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:13:33,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:33,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:13:33,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:13:33,162 INFO L87 Difference]: Start difference. First operand 277 states and 605 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:13:33,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:33,879 INFO L93 Difference]: Finished difference Result 466 states and 977 transitions. [2021-08-06 15:13:33,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:13:33,879 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-08-06 15:13:33,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:33,880 INFO L225 Difference]: With dead ends: 466 [2021-08-06 15:13:33,880 INFO L226 Difference]: Without dead ends: 452 [2021-08-06 15:13:33,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 760.3ms TimeCoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:13:33,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-08-06 15:13:33,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 297. [2021-08-06 15:13:33,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.199324324324324) internal successors, (651), 296 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:33,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 651 transitions. [2021-08-06 15:13:33,885 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 651 transitions. Word has length 27 [2021-08-06 15:13:33,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:33,885 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 651 transitions. [2021-08-06 15:13:33,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:13:33,885 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 651 transitions. [2021-08-06 15:13:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:33,885 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:33,885 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:33,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:34,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:34,099 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:34,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:34,099 INFO L82 PathProgramCache]: Analyzing trace with hash 918560951, now seen corresponding path program 33 times [2021-08-06 15:13:34,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:34,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265600416] [2021-08-06 15:13:34,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:34,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:13:34,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:34,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265600416] [2021-08-06 15:13:34,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265600416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:34,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834321315] [2021-08-06 15:13:34,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:13:34,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:34,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:34,287 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) [2021-08-06 15:13:34,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 15:13:35,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:13:35,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:35,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:13:35,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:36,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834321315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:36,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:36,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-06 15:13:36,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241698350] [2021-08-06 15:13:36,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:13:36,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:36,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:13:36,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:13:36,627 INFO L87 Difference]: Start difference. First operand 297 states and 651 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:37,941 INFO L93 Difference]: Finished difference Result 571 states and 1205 transitions. [2021-08-06 15:13:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:13:37,942 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-08-06 15:13:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:37,943 INFO L225 Difference]: With dead ends: 571 [2021-08-06 15:13:37,943 INFO L226 Difference]: Without dead ends: 539 [2021-08-06 15:13:37,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 1140.2ms TimeCoverageRelationStatistics Valid=549, Invalid=3483, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:13:37,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-06 15:13:37,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 297. [2021-08-06 15:13:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.199324324324324) internal successors, (651), 296 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:37,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 651 transitions. [2021-08-06 15:13:37,948 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 651 transitions. Word has length 27 [2021-08-06 15:13:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:37,948 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 651 transitions. [2021-08-06 15:13:37,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:37,948 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 651 transitions. [2021-08-06 15:13:37,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:37,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:37,949 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:37,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:38,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:38,157 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:38,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:38,157 INFO L82 PathProgramCache]: Analyzing trace with hash -238549261, now seen corresponding path program 34 times [2021-08-06 15:13:38,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:38,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825071238] [2021-08-06 15:13:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:38,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:13:38,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:38,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825071238] [2021-08-06 15:13:38,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825071238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:38,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100586496] [2021-08-06 15:13:38,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:13:38,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:38,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:38,347 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) [2021-08-06 15:13:38,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 15:13:40,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:13:40,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:40,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:13:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:40,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100586496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:40,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:40,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-06 15:13:40,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252124839] [2021-08-06 15:13:40,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:13:40,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:40,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:13:40,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:13:40,762 INFO L87 Difference]: Start difference. First operand 297 states and 651 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:41,689 INFO L93 Difference]: Finished difference Result 629 states and 1349 transitions. [2021-08-06 15:13:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:13:41,689 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-08-06 15:13:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:41,691 INFO L225 Difference]: With dead ends: 629 [2021-08-06 15:13:41,691 INFO L226 Difference]: Without dead ends: 587 [2021-08-06 15:13:41,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 908.9ms TimeCoverageRelationStatistics Valid=441, Invalid=2529, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 15:13:41,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-06 15:13:41,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 291. [2021-08-06 15:13:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.196551724137931) internal successors, (637), 290 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 637 transitions. [2021-08-06 15:13:41,696 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 637 transitions. Word has length 27 [2021-08-06 15:13:41,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:41,696 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 637 transitions. [2021-08-06 15:13:41,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:41,696 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 637 transitions. [2021-08-06 15:13:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:41,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:41,697 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:41,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:41,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 15:13:41,912 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:41,913 INFO L82 PathProgramCache]: Analyzing trace with hash 183791603, now seen corresponding path program 35 times [2021-08-06 15:13:41,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:41,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104457593] [2021-08-06 15:13:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:41,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:42,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:42,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104457593] [2021-08-06 15:13:42,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104457593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:42,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302845348] [2021-08-06 15:13:42,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:13:42,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:42,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:42,105 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) [2021-08-06 15:13:42,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 15:13:43,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:13:43,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:43,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:13:43,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:44,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302845348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:44,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:44,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-06 15:13:44,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188617266] [2021-08-06 15:13:44,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:13:44,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:44,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:13:44,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:13:44,563 INFO L87 Difference]: Start difference. First operand 291 states and 637 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:13:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:45,313 INFO L93 Difference]: Finished difference Result 586 states and 1209 transitions. [2021-08-06 15:13:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:13:45,313 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-08-06 15:13:45,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:45,315 INFO L225 Difference]: With dead ends: 586 [2021-08-06 15:13:45,315 INFO L226 Difference]: Without dead ends: 572 [2021-08-06 15:13:45,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 775.3ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:13:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-08-06 15:13:45,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 360. [2021-08-06 15:13:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.2256267409470754) internal successors, (799), 359 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:45,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 799 transitions. [2021-08-06 15:13:45,320 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 799 transitions. Word has length 27 [2021-08-06 15:13:45,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:45,320 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 799 transitions. [2021-08-06 15:13:45,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:13:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 799 transitions. [2021-08-06 15:13:45,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:45,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:45,321 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:45,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:45,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 15:13:45,542 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:45,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1880365043, now seen corresponding path program 36 times [2021-08-06 15:13:45,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:45,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689071129] [2021-08-06 15:13:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:45,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:45,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:45,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689071129] [2021-08-06 15:13:45,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689071129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:45,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310206416] [2021-08-06 15:13:45,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:13:45,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:45,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:45,722 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) [2021-08-06 15:13:45,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 15:13:47,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:13:47,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:47,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:13:47,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:48,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310206416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:48,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:48,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-06 15:13:48,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800129608] [2021-08-06 15:13:48,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:13:48,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:48,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:13:48,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:13:48,260 INFO L87 Difference]: Start difference. First operand 360 states and 799 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:49,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:49,703 INFO L93 Difference]: Finished difference Result 658 states and 1370 transitions. [2021-08-06 15:13:49,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-06 15:13:49,703 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-08-06 15:13:49,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:49,705 INFO L225 Difference]: With dead ends: 658 [2021-08-06 15:13:49,705 INFO L226 Difference]: Without dead ends: 638 [2021-08-06 15:13:49,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1253.2ms TimeCoverageRelationStatistics Valid=687, Invalid=4283, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 15:13:49,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-08-06 15:13:49,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 354. [2021-08-06 15:13:49,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.223796033994334) internal successors, (785), 353 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 785 transitions. [2021-08-06 15:13:49,711 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 785 transitions. Word has length 27 [2021-08-06 15:13:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:49,711 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 785 transitions. [2021-08-06 15:13:49,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 785 transitions. [2021-08-06 15:13:49,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:49,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:49,712 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:49,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:49,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 15:13:49,916 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:49,917 INFO L82 PathProgramCache]: Analyzing trace with hash 723254831, now seen corresponding path program 37 times [2021-08-06 15:13:49,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:49,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160388943] [2021-08-06 15:13:49,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:49,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:50,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:50,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160388943] [2021-08-06 15:13:50,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160388943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:50,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131630281] [2021-08-06 15:13:50,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:13:50,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:50,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:50,100 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) [2021-08-06 15:13:50,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 15:13:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:51,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:13:51,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:52,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131630281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:52,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:52,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-08-06 15:13:52,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297091409] [2021-08-06 15:13:52,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:13:52,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:52,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:13:52,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:13:52,677 INFO L87 Difference]: Start difference. First operand 354 states and 785 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:53,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:53,908 INFO L93 Difference]: Finished difference Result 688 states and 1439 transitions. [2021-08-06 15:13:53,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 15:13:53,908 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 27 [2021-08-06 15:13:53,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:53,910 INFO L225 Difference]: With dead ends: 688 [2021-08-06 15:13:53,910 INFO L226 Difference]: Without dead ends: 652 [2021-08-06 15:13:53,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1099.3ms TimeCoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:13:53,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-08-06 15:13:53,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 358. [2021-08-06 15:13:53,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.2212885154061626) internal successors, (793), 357 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 793 transitions. [2021-08-06 15:13:53,916 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 793 transitions. Word has length 27 [2021-08-06 15:13:53,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:53,916 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 793 transitions. [2021-08-06 15:13:53,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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) [2021-08-06 15:13:53,916 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 793 transitions. [2021-08-06 15:13:53,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:53,917 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:53,917 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:53,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:54,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 15:13:54,138 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:54,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:54,138 INFO L82 PathProgramCache]: Analyzing trace with hash -45150409, now seen corresponding path program 38 times [2021-08-06 15:13:54,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:54,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561526972] [2021-08-06 15:13:54,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:54,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:54,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:54,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561526972] [2021-08-06 15:13:54,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561526972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:54,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783063048] [2021-08-06 15:13:54,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:13:54,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:54,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:54,339 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) [2021-08-06 15:13:54,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 15:13:56,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:13:56,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:56,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:13:56,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:13:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:56,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783063048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:56,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:13:56,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-06 15:13:56,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895758969] [2021-08-06 15:13:56,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:13:56,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:13:56,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:13:56,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:13:56,951 INFO L87 Difference]: Start difference. First operand 358 states and 793 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2021-08-06 15:13:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:13:57,606 INFO L93 Difference]: Finished difference Result 640 states and 1341 transitions. [2021-08-06 15:13:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 15:13:57,606 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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 27 [2021-08-06 15:13:57,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:13:57,608 INFO L225 Difference]: With dead ends: 640 [2021-08-06 15:13:57,608 INFO L226 Difference]: Without dead ends: 626 [2021-08-06 15:13:57,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 670.9ms TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:13:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-08-06 15:13:57,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 440. [2021-08-06 15:13:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.2391799544419135) internal successors, (983), 439 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:13:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 983 transitions. [2021-08-06 15:13:57,613 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 983 transitions. Word has length 27 [2021-08-06 15:13:57,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:13:57,613 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 983 transitions. [2021-08-06 15:13:57,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 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) [2021-08-06 15:13:57,614 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 983 transitions. [2021-08-06 15:13:57,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:13:57,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:13:57,614 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:13:57,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 15:13:57,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 15:13:57,829 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:13:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:13:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1651423031, now seen corresponding path program 39 times [2021-08-06 15:13:57,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:13:57,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478899140] [2021-08-06 15:13:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:13:57,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:13:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:13:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:13:58,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:13:58,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478899140] [2021-08-06 15:13:58,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478899140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:13:58,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555500074] [2021-08-06 15:13:58,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:13:58,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:13:58,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:13:58,018 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) [2021-08-06 15:13:58,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 15:13:59,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:13:59,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:13:59,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:13:59,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:00,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555500074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:00,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:00,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-06 15:14:00,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005689816] [2021-08-06 15:14:00,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:14:00,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:00,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:14:00,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:14:00,654 INFO L87 Difference]: Start difference. First operand 440 states and 983 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:14:01,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:01,915 INFO L93 Difference]: Finished difference Result 725 states and 1540 transitions. [2021-08-06 15:14:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:14:01,916 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 27 [2021-08-06 15:14:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:01,918 INFO L225 Difference]: With dead ends: 725 [2021-08-06 15:14:01,918 INFO L226 Difference]: Without dead ends: 705 [2021-08-06 15:14:01,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1097.4ms TimeCoverageRelationStatistics Valid=578, Invalid=3454, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:14:01,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-08-06 15:14:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 379. [2021-08-06 15:14:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.2248677248677247) internal successors, (841), 378 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 841 transitions. [2021-08-06 15:14:01,924 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 841 transitions. Word has length 27 [2021-08-06 15:14:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:01,924 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 841 transitions. [2021-08-06 15:14:01,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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) [2021-08-06 15:14:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 841 transitions. [2021-08-06 15:14:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:14:01,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:01,924 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:01,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-06 15:14:02,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-06 15:14:02,132 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:14:02,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:02,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1716949619, now seen corresponding path program 40 times [2021-08-06 15:14:02,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:02,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051149898] [2021-08-06 15:14:02,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:02,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:02,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:02,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051149898] [2021-08-06 15:14:02,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051149898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:02,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183035586] [2021-08-06 15:14:02,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:14:02,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:02,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:02,325 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) [2021-08-06 15:14:02,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 15:14:04,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:14:04,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:04,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:14:04,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:05,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183035586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:05,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:05,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-08-06 15:14:05,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247280331] [2021-08-06 15:14:05,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:14:05,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:05,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:14:05,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:14:05,047 INFO L87 Difference]: Start difference. First operand 379 states and 841 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 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) [2021-08-06 15:14:05,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:05,609 INFO L93 Difference]: Finished difference Result 659 states and 1361 transitions. [2021-08-06 15:14:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 15:14:05,609 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 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 27 [2021-08-06 15:14:05,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:05,611 INFO L225 Difference]: With dead ends: 659 [2021-08-06 15:14:05,611 INFO L226 Difference]: Without dead ends: 645 [2021-08-06 15:14:05,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 603.4ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:14:05,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-08-06 15:14:05,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 451. [2021-08-06 15:14:05,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 2.2644444444444445) internal successors, (1019), 450 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1019 transitions. [2021-08-06 15:14:05,617 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1019 transitions. Word has length 27 [2021-08-06 15:14:05,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:05,617 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 1019 transitions. [2021-08-06 15:14:05,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 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) [2021-08-06 15:14:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1019 transitions. [2021-08-06 15:14:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:14:05,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:05,618 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:05,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:05,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 15:14:05,829 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:14:05,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:05,829 INFO L82 PathProgramCache]: Analyzing trace with hash 36452979, now seen corresponding path program 41 times [2021-08-06 15:14:05,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:05,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494611239] [2021-08-06 15:14:05,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:05,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:06,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:06,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494611239] [2021-08-06 15:14:06,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494611239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:06,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811162379] [2021-08-06 15:14:06,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:14:06,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:06,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:06,040 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) [2021-08-06 15:14:06,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 15:14:08,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:14:08,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:08,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:14:08,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:08,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811162379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:08,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:08,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-08-06 15:14:08,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271256099] [2021-08-06 15:14:08,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:14:08,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:08,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:14:08,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:14:08,831 INFO L87 Difference]: Start difference. First operand 451 states and 1019 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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) [2021-08-06 15:14:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:09,913 INFO L93 Difference]: Finished difference Result 757 states and 1589 transitions. [2021-08-06 15:14:09,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 15:14:09,913 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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 27 [2021-08-06 15:14:09,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:09,915 INFO L225 Difference]: With dead ends: 757 [2021-08-06 15:14:09,915 INFO L226 Difference]: Without dead ends: 743 [2021-08-06 15:14:09,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1034.6ms TimeCoverageRelationStatistics Valid=501, Invalid=3281, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:14:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-08-06 15:14:09,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 452. [2021-08-06 15:14:09,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 2.2749445676274944) internal successors, (1026), 451 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:09,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1026 transitions. [2021-08-06 15:14:09,922 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1026 transitions. Word has length 27 [2021-08-06 15:14:09,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:09,922 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1026 transitions. [2021-08-06 15:14:09,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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) [2021-08-06 15:14:09,922 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1026 transitions. [2021-08-06 15:14:09,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:14:09,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:09,923 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:09,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:10,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-06 15:14:10,136 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:14:10,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:10,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1733026419, now seen corresponding path program 42 times [2021-08-06 15:14:10,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:10,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474244388] [2021-08-06 15:14:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:10,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:10,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:10,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474244388] [2021-08-06 15:14:10,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474244388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:10,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756916291] [2021-08-06 15:14:10,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:14:10,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:10,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:10,349 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) [2021-08-06 15:14:10,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 15:14:12,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:14:12,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:12,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:14:12,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:13,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756916291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:13,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:13,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-08-06 15:14:13,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53249736] [2021-08-06 15:14:13,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:14:13,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:13,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:14:13,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:14:13,167 INFO L87 Difference]: Start difference. First operand 452 states and 1026 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 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) [2021-08-06 15:14:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:14,824 INFO L93 Difference]: Finished difference Result 787 states and 1669 transitions. [2021-08-06 15:14:14,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 15:14:14,825 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 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 27 [2021-08-06 15:14:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:14,827 INFO L225 Difference]: With dead ends: 787 [2021-08-06 15:14:14,827 INFO L226 Difference]: Without dead ends: 751 [2021-08-06 15:14:14,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 1423.9ms TimeCoverageRelationStatistics Valid=700, Invalid=4556, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 15:14:14,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-08-06 15:14:14,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 445. [2021-08-06 15:14:14,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.259009009009009) internal successors, (1003), 444 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1003 transitions. [2021-08-06 15:14:14,835 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1003 transitions. Word has length 27 [2021-08-06 15:14:14,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:14,835 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 1003 transitions. [2021-08-06 15:14:14,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 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) [2021-08-06 15:14:14,835 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1003 transitions. [2021-08-06 15:14:14,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:14:14,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:14,836 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:14,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-06 15:14:15,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:15,049 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:14:15,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:15,049 INFO L82 PathProgramCache]: Analyzing trace with hash 989532139, now seen corresponding path program 43 times [2021-08-06 15:14:15,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:15,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675709149] [2021-08-06 15:14:15,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:15,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:15,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:15,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675709149] [2021-08-06 15:14:15,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675709149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:15,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774655768] [2021-08-06 15:14:15,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:14:15,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:15,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:15,283 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) [2021-08-06 15:14:15,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 15:14:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:14:17,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:18,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774655768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:18,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:18,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-08-06 15:14:18,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890694617] [2021-08-06 15:14:18,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:14:18,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:18,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:14:18,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:14:18,084 INFO L87 Difference]: Start difference. First operand 445 states and 1003 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 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) [2021-08-06 15:14:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:18,810 INFO L93 Difference]: Finished difference Result 743 states and 1560 transitions. [2021-08-06 15:14:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:14:18,810 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 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 27 [2021-08-06 15:14:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:18,812 INFO L225 Difference]: With dead ends: 743 [2021-08-06 15:14:18,812 INFO L226 Difference]: Without dead ends: 717 [2021-08-06 15:14:18,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 710.5ms TimeCoverageRelationStatistics Valid=410, Invalid=1660, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:14:18,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-08-06 15:14:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 484. [2021-08-06 15:14:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.2546583850931676) internal successors, (1089), 483 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1089 transitions. [2021-08-06 15:14:18,819 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1089 transitions. Word has length 27 [2021-08-06 15:14:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:18,819 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1089 transitions. [2021-08-06 15:14:18,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 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) [2021-08-06 15:14:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1089 transitions. [2021-08-06 15:14:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:14:18,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:18,820 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:18,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:19,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:19,037 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:14:19,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:19,037 INFO L82 PathProgramCache]: Analyzing trace with hash -342558545, now seen corresponding path program 44 times [2021-08-06 15:14:19,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:19,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986307381] [2021-08-06 15:14:19,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:19,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:19,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:19,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986307381] [2021-08-06 15:14:19,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986307381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:19,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542466512] [2021-08-06 15:14:19,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:14:19,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:19,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:19,230 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) [2021-08-06 15:14:19,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 15:14:21,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:14:21,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:21,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:14:21,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:22,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542466512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:22,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:22,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-08-06 15:14:22,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885121407] [2021-08-06 15:14:22,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:14:22,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:22,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:14:22,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:14:22,191 INFO L87 Difference]: Start difference. First operand 484 states and 1089 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 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) [2021-08-06 15:14:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:23,367 INFO L93 Difference]: Finished difference Result 813 states and 1766 transitions. [2021-08-06 15:14:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:14:23,368 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 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 27 [2021-08-06 15:14:23,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:23,370 INFO L225 Difference]: With dead ends: 813 [2021-08-06 15:14:23,370 INFO L226 Difference]: Without dead ends: 777 [2021-08-06 15:14:23,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1063.8ms TimeCoverageRelationStatistics Valid=542, Invalid=2998, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:14:23,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-08-06 15:14:23,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 431. [2021-08-06 15:14:23,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.2488372093023257) internal successors, (967), 430 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:23,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 967 transitions. [2021-08-06 15:14:23,377 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 967 transitions. Word has length 27 [2021-08-06 15:14:23,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:23,377 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 967 transitions. [2021-08-06 15:14:23,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 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) [2021-08-06 15:14:23,377 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 967 transitions. [2021-08-06 15:14:23,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:14:23,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:23,378 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:23,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 15:14:23,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 15:14:23,580 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:14:23,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:23,581 INFO L82 PathProgramCache]: Analyzing trace with hash -836906575, now seen corresponding path program 45 times [2021-08-06 15:14:23,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:23,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192657917] [2021-08-06 15:14:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:23,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:14:23,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:23,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192657917] [2021-08-06 15:14:23,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192657917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:23,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413431634] [2021-08-06 15:14:23,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:14:23,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:23,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:23,835 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) [2021-08-06 15:14:23,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 15:14:26,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:14:26,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:26,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:14:26,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:26,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413431634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:26,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:26,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-08-06 15:14:26,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106826554] [2021-08-06 15:14:26,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:14:26,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:26,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:14:26,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:14:26,898 INFO L87 Difference]: Start difference. First operand 431 states and 967 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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) [2021-08-06 15:14:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:27,670 INFO L93 Difference]: Finished difference Result 597 states and 1282 transitions. [2021-08-06 15:14:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:14:27,670 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:14:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:27,671 INFO L225 Difference]: With dead ends: 597 [2021-08-06 15:14:27,671 INFO L226 Difference]: Without dead ends: 523 [2021-08-06 15:14:27,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 899.2ms TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:14:27,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-08-06 15:14:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 478. [2021-08-06 15:14:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.19706498951782) internal successors, (1048), 477 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1048 transitions. [2021-08-06 15:14:27,677 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1048 transitions. Word has length 29 [2021-08-06 15:14:27,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:27,677 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1048 transitions. [2021-08-06 15:14:27,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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) [2021-08-06 15:14:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1048 transitions. [2021-08-06 15:14:27,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:14:27,678 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:27,678 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:27,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:27,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 15:14:27,891 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:14:27,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:27,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1394843693, now seen corresponding path program 46 times [2021-08-06 15:14:27,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:27,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464327032] [2021-08-06 15:14:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:27,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:28,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:28,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464327032] [2021-08-06 15:14:28,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464327032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:28,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090356432] [2021-08-06 15:14:28,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:14:28,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:28,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:28,157 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) [2021-08-06 15:14:28,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 15:14:30,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:14:30,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:30,496 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:14:30,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:31,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090356432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:31,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:31,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-08-06 15:14:31,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708556794] [2021-08-06 15:14:31,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:14:31,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:31,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:14:31,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:14:31,302 INFO L87 Difference]: Start difference. First operand 478 states and 1048 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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) [2021-08-06 15:14:32,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:32,190 INFO L93 Difference]: Finished difference Result 568 states and 1202 transitions. [2021-08-06 15:14:32,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:14:32,191 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:14:32,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:32,192 INFO L225 Difference]: With dead ends: 568 [2021-08-06 15:14:32,192 INFO L226 Difference]: Without dead ends: 544 [2021-08-06 15:14:32,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1004.3ms TimeCoverageRelationStatistics Valid=411, Invalid=2781, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 15:14:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-08-06 15:14:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 481. [2021-08-06 15:14:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.19375) internal successors, (1053), 480 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1053 transitions. [2021-08-06 15:14:32,198 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1053 transitions. Word has length 29 [2021-08-06 15:14:32,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:32,198 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1053 transitions. [2021-08-06 15:14:32,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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) [2021-08-06 15:14:32,198 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1053 transitions. [2021-08-06 15:14:32,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:14:32,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:32,199 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:32,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:32,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-06 15:14:32,400 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:14:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:32,400 INFO L82 PathProgramCache]: Analyzing trace with hash -820829775, now seen corresponding path program 47 times [2021-08-06 15:14:32,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:32,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973448584] [2021-08-06 15:14:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:32,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:14:32,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:32,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973448584] [2021-08-06 15:14:32,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973448584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:32,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414435052] [2021-08-06 15:14:32,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:14:32,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:32,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:32,667 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) [2021-08-06 15:14:32,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 15:14:35,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:14:35,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:35,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:14:35,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:35,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414435052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:35,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:35,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-08-06 15:14:35,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624867043] [2021-08-06 15:14:35,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 15:14:35,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:35,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 15:14:35,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:14:35,918 INFO L87 Difference]: Start difference. First operand 481 states and 1053 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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) [2021-08-06 15:14:37,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:37,155 INFO L93 Difference]: Finished difference Result 602 states and 1271 transitions. [2021-08-06 15:14:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:14:37,156 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:14:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:37,157 INFO L225 Difference]: With dead ends: 602 [2021-08-06 15:14:37,157 INFO L226 Difference]: Without dead ends: 576 [2021-08-06 15:14:37,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1260.2ms TimeCoverageRelationStatistics Valid=555, Invalid=3351, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 15:14:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-08-06 15:14:37,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 463. [2021-08-06 15:14:37,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.2012987012987013) internal successors, (1017), 462 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:37,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1017 transitions. [2021-08-06 15:14:37,164 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1017 transitions. Word has length 29 [2021-08-06 15:14:37,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:37,164 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1017 transitions. [2021-08-06 15:14:37,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 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) [2021-08-06 15:14:37,164 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1017 transitions. [2021-08-06 15:14:37,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:14:37,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:37,165 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:37,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:37,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:37,381 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:14:37,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:37,381 INFO L82 PathProgramCache]: Analyzing trace with hash -783308743, now seen corresponding path program 48 times [2021-08-06 15:14:37,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:37,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459571962] [2021-08-06 15:14:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:37,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:14:37,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:37,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459571962] [2021-08-06 15:14:37,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459571962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:37,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907048561] [2021-08-06 15:14:37,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:14:37,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:37,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:37,627 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) [2021-08-06 15:14:37,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 15:14:40,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:14:40,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:40,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:14:40,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:40,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907048561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:40,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:40,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-06 15:14:40,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354613202] [2021-08-06 15:14:40,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:14:40,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:40,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:14:40,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:14:40,849 INFO L87 Difference]: Start difference. First operand 463 states and 1017 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:41,694 INFO L93 Difference]: Finished difference Result 659 states and 1394 transitions. [2021-08-06 15:14:41,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:14:41,695 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:14:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:41,696 INFO L225 Difference]: With dead ends: 659 [2021-08-06 15:14:41,696 INFO L226 Difference]: Without dead ends: 605 [2021-08-06 15:14:41,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 912.4ms TimeCoverageRelationStatistics Valid=377, Invalid=2593, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 15:14:41,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-08-06 15:14:41,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 503. [2021-08-06 15:14:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.189243027888446) internal successors, (1099), 502 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1099 transitions. [2021-08-06 15:14:41,703 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1099 transitions. Word has length 29 [2021-08-06 15:14:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:41,703 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1099 transitions. [2021-08-06 15:14:41,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1099 transitions. [2021-08-06 15:14:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:14:41,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:41,703 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:41,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-06 15:14:41,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 15:14:41,920 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:14:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:41,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1398873781, now seen corresponding path program 49 times [2021-08-06 15:14:41,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:41,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172435088] [2021-08-06 15:14:41,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:41,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:14:42,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:42,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172435088] [2021-08-06 15:14:42,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172435088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:42,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446597049] [2021-08-06 15:14:42,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:14:42,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:42,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:42,187 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) [2021-08-06 15:14:42,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 15:14:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:44,629 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:14:44,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:45,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446597049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:45,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:45,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-06 15:14:45,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408920280] [2021-08-06 15:14:45,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:14:45,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:45,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:14:45,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:14:45,415 INFO L87 Difference]: Start difference. First operand 503 states and 1099 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:46,500 INFO L93 Difference]: Finished difference Result 665 states and 1402 transitions. [2021-08-06 15:14:46,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:14:46,500 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:14:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:46,502 INFO L225 Difference]: With dead ends: 665 [2021-08-06 15:14:46,502 INFO L226 Difference]: Without dead ends: 643 [2021-08-06 15:14:46,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1116.5ms TimeCoverageRelationStatistics Valid=514, Invalid=3392, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 15:14:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-08-06 15:14:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 504. [2021-08-06 15:14:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.1868787276341948) internal successors, (1100), 503 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1100 transitions. [2021-08-06 15:14:46,509 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1100 transitions. Word has length 29 [2021-08-06 15:14:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:46,509 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1100 transitions. [2021-08-06 15:14:46,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1100 transitions. [2021-08-06 15:14:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:14:46,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:46,510 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:46,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:46,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:46,710 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:14:46,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:46,710 INFO L82 PathProgramCache]: Analyzing trace with hash -816799687, now seen corresponding path program 50 times [2021-08-06 15:14:46,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:46,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398255484] [2021-08-06 15:14:46,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:46,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:14:46,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:46,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398255484] [2021-08-06 15:14:46,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398255484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:46,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735653581] [2021-08-06 15:14:46,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:14:46,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:46,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:46,988 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) [2021-08-06 15:14:46,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 15:14:49,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:14:49,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:49,452 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:14:49,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:50,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735653581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:50,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:50,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-06 15:14:50,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257419232] [2021-08-06 15:14:50,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:14:50,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:50,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:14:50,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:14:50,268 INFO L87 Difference]: Start difference. First operand 504 states and 1100 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:51,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:51,642 INFO L93 Difference]: Finished difference Result 708 states and 1488 transitions. [2021-08-06 15:14:51,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 15:14:51,643 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:14:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:51,644 INFO L225 Difference]: With dead ends: 708 [2021-08-06 15:14:51,644 INFO L226 Difference]: Without dead ends: 682 [2021-08-06 15:14:51,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1300.9ms TimeCoverageRelationStatistics Valid=657, Invalid=3633, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 15:14:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-08-06 15:14:51,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 485. [2021-08-06 15:14:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.18801652892562) internal successors, (1059), 484 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1059 transitions. [2021-08-06 15:14:51,650 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1059 transitions. Word has length 29 [2021-08-06 15:14:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:51,651 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1059 transitions. [2021-08-06 15:14:51,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1059 transitions. [2021-08-06 15:14:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:14:51,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:51,651 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:51,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 15:14:51,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-06 15:14:51,861 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:14:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:51,861 INFO L82 PathProgramCache]: Analyzing trace with hash -454850335, now seen corresponding path program 51 times [2021-08-06 15:14:51,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:51,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779292489] [2021-08-06 15:14:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:51,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:52,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:52,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779292489] [2021-08-06 15:14:52,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779292489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:52,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340625401] [2021-08-06 15:14:52,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:14:52,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:52,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:52,141 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) [2021-08-06 15:14:52,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 15:14:54,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:14:54,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:54,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:14:54,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:14:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:14:55,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340625401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:55,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:14:55,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-08-06 15:14:55,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896358288] [2021-08-06 15:14:55,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:14:55,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:14:55,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:14:55,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:14:55,601 INFO L87 Difference]: Start difference. First operand 485 states and 1059 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-08-06 15:14:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:14:56,462 INFO L93 Difference]: Finished difference Result 694 states and 1464 transitions. [2021-08-06 15:14:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:14:56,462 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:14:56,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:14:56,464 INFO L225 Difference]: With dead ends: 694 [2021-08-06 15:14:56,464 INFO L226 Difference]: Without dead ends: 617 [2021-08-06 15:14:56,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 919.3ms TimeCoverageRelationStatistics Valid=324, Invalid=2328, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 15:14:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-08-06 15:14:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 501. [2021-08-06 15:14:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.182) internal successors, (1091), 500 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:14:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1091 transitions. [2021-08-06 15:14:56,469 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1091 transitions. Word has length 29 [2021-08-06 15:14:56,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:14:56,470 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1091 transitions. [2021-08-06 15:14:56,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-08-06 15:14:56,470 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1091 transitions. [2021-08-06 15:14:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:14:56,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:14:56,470 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:14:56,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 15:14:56,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-06 15:14:56,671 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:14:56,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:14:56,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1947308465, now seen corresponding path program 52 times [2021-08-06 15:14:56,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:14:56,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308305199] [2021-08-06 15:14:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:14:56,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:14:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:14:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:14:56,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:14:56,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308305199] [2021-08-06 15:14:56,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308305199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:14:56,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702737336] [2021-08-06 15:14:56,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:14:56,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:14:56,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:14:56,904 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) [2021-08-06 15:14:56,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 15:14:59,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:14:59,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:14:59,540 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:14:59,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:00,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702737336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:00,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:00,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-06 15:15:00,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933663980] [2021-08-06 15:15:00,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:15:00,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:00,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:15:00,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:15:00,332 INFO L87 Difference]: Start difference. First operand 501 states and 1091 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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) [2021-08-06 15:15:01,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:01,352 INFO L93 Difference]: Finished difference Result 724 states and 1537 transitions. [2021-08-06 15:15:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:15:01,352 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:15:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:01,353 INFO L225 Difference]: With dead ends: 724 [2021-08-06 15:15:01,353 INFO L226 Difference]: Without dead ends: 672 [2021-08-06 15:15:01,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 989.5ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:15:01,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-08-06 15:15:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 585. [2021-08-06 15:15:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1780821917808217) internal successors, (1272), 584 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1272 transitions. [2021-08-06 15:15:01,360 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1272 transitions. Word has length 29 [2021-08-06 15:15:01,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:01,360 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 1272 transitions. [2021-08-06 15:15:01,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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) [2021-08-06 15:15:01,360 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1272 transitions. [2021-08-06 15:15:01,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:15:01,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:01,361 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:01,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 15:15:01,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:01,562 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:15:01,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:01,562 INFO L82 PathProgramCache]: Analyzing trace with hash -115908563, now seen corresponding path program 53 times [2021-08-06 15:15:01,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:01,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587281497] [2021-08-06 15:15:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:01,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:01,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:01,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587281497] [2021-08-06 15:15:01,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587281497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:01,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225623997] [2021-08-06 15:15:01,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:15:01,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:01,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:01,960 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) [2021-08-06 15:15:01,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 15:15:04,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:15:04,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:04,862 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:15:04,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:05,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225623997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:05,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:05,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-06 15:15:05,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66946345] [2021-08-06 15:15:05,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:15:05,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:05,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:15:05,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:15:05,781 INFO L87 Difference]: Start difference. First operand 585 states and 1272 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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) [2021-08-06 15:15:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:07,273 INFO L93 Difference]: Finished difference Result 750 states and 1578 transitions. [2021-08-06 15:15:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 15:15:07,273 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:15:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:07,280 INFO L225 Difference]: With dead ends: 750 [2021-08-06 15:15:07,280 INFO L226 Difference]: Without dead ends: 726 [2021-08-06 15:15:07,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1566.8ms TimeCoverageRelationStatistics Valid=612, Invalid=4080, Unknown=0, NotChecked=0, Total=4692 [2021-08-06 15:15:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-08-06 15:15:07,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 586. [2021-08-06 15:15:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.1709401709401708) internal successors, (1270), 585 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1270 transitions. [2021-08-06 15:15:07,287 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1270 transitions. Word has length 29 [2021-08-06 15:15:07,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:07,287 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1270 transitions. [2021-08-06 15:15:07,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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) [2021-08-06 15:15:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1270 transitions. [2021-08-06 15:15:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:15:07,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:07,288 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:07,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 15:15:07,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-06 15:15:07,496 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:15:07,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:07,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1963385265, now seen corresponding path program 54 times [2021-08-06 15:15:07,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:07,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234140130] [2021-08-06 15:15:07,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:07,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:15:07,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:07,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234140130] [2021-08-06 15:15:07,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234140130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:07,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040089189] [2021-08-06 15:15:07,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:15:07,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:07,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:07,818 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) [2021-08-06 15:15:07,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 15:15:10,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:15:10,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:10,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:15:10,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:11,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040089189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:11,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:11,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-06 15:15:11,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836164547] [2021-08-06 15:15:11,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:15:11,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:11,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:15:11,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:15:11,516 INFO L87 Difference]: Start difference. First operand 586 states and 1270 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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) [2021-08-06 15:15:13,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:13,275 INFO L93 Difference]: Finished difference Result 803 states and 1683 transitions. [2021-08-06 15:15:13,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 15:15:13,276 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:15:13,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:13,277 INFO L225 Difference]: With dead ends: 803 [2021-08-06 15:15:13,277 INFO L226 Difference]: Without dead ends: 777 [2021-08-06 15:15:13,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 1686.3ms TimeCoverageRelationStatistics Valid=810, Invalid=4592, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 15:15:13,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-08-06 15:15:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 567. [2021-08-06 15:15:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.1607773851590104) internal successors, (1223), 566 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1223 transitions. [2021-08-06 15:15:13,284 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1223 transitions. Word has length 29 [2021-08-06 15:15:13,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:13,284 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1223 transitions. [2021-08-06 15:15:13,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 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) [2021-08-06 15:15:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1223 transitions. [2021-08-06 15:15:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:15:13,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:13,285 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:13,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 15:15:13,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 15:15:13,505 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:15:13,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:13,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1115782371, now seen corresponding path program 55 times [2021-08-06 15:15:13,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:13,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826061579] [2021-08-06 15:15:13,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:13,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:13,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:13,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826061579] [2021-08-06 15:15:13,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826061579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:13,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720809043] [2021-08-06 15:15:13,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:15:13,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:13,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:13,838 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) [2021-08-06 15:15:13,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 15:15:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:16,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:15:16,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:17,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720809043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:17,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:17,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-08-06 15:15:17,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399102429] [2021-08-06 15:15:17,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:15:17,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:17,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:15:17,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:15:17,794 INFO L87 Difference]: Start difference. First operand 567 states and 1223 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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) [2021-08-06 15:15:18,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:18,611 INFO L93 Difference]: Finished difference Result 727 states and 1532 transitions. [2021-08-06 15:15:18,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:15:18,612 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:15:18,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:18,613 INFO L225 Difference]: With dead ends: 727 [2021-08-06 15:15:18,613 INFO L226 Difference]: Without dead ends: 705 [2021-08-06 15:15:18,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 913.1ms TimeCoverageRelationStatistics Valid=284, Invalid=1878, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:15:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-08-06 15:15:18,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 592. [2021-08-06 15:15:18,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 2.1573604060913705) internal successors, (1275), 591 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1275 transitions. [2021-08-06 15:15:18,619 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1275 transitions. Word has length 29 [2021-08-06 15:15:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:18,620 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 1275 transitions. [2021-08-06 15:15:18,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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) [2021-08-06 15:15:18,620 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1275 transitions. [2021-08-06 15:15:18,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:15:18,620 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:18,620 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:18,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 15:15:18,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:18,821 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:15:18,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:18,821 INFO L82 PathProgramCache]: Analyzing trace with hash 963511457, now seen corresponding path program 56 times [2021-08-06 15:15:18,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:18,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177303776] [2021-08-06 15:15:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:18,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:19,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:19,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177303776] [2021-08-06 15:15:19,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177303776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:19,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320052146] [2021-08-06 15:15:19,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:15:19,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:19,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:19,129 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) [2021-08-06 15:15:19,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 15:15:22,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:15:22,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:22,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:15:22,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:23,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320052146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:23,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:23,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-08-06 15:15:23,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914409001] [2021-08-06 15:15:23,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:15:23,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:15:23,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:15:23,210 INFO L87 Difference]: Start difference. First operand 592 states and 1275 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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) [2021-08-06 15:15:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:24,172 INFO L93 Difference]: Finished difference Result 850 states and 1794 transitions. [2021-08-06 15:15:24,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:15:24,172 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:15:24,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:24,173 INFO L225 Difference]: With dead ends: 850 [2021-08-06 15:15:24,173 INFO L226 Difference]: Without dead ends: 817 [2021-08-06 15:15:24,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1019.0ms TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 15:15:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-08-06 15:15:24,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 591. [2021-08-06 15:15:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 2.1576271186440676) internal successors, (1273), 590 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1273 transitions. [2021-08-06 15:15:24,181 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1273 transitions. Word has length 29 [2021-08-06 15:15:24,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:24,181 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 1273 transitions. [2021-08-06 15:15:24,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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) [2021-08-06 15:15:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1273 transitions. [2021-08-06 15:15:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:15:24,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:24,182 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:24,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 15:15:24,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:24,396 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:15:24,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:24,396 INFO L82 PathProgramCache]: Analyzing trace with hash -112199699, now seen corresponding path program 57 times [2021-08-06 15:15:24,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:24,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817825537] [2021-08-06 15:15:24,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:24,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:24,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:24,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817825537] [2021-08-06 15:15:24,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817825537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:24,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710112473] [2021-08-06 15:15:24,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:15:24,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:24,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:24,653 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) [2021-08-06 15:15:24,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 15:15:27,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:15:27,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:27,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:15:27,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:28,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710112473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:28,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:28,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-08-06 15:15:28,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697736374] [2021-08-06 15:15:28,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:15:28,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:28,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:15:28,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:15:28,805 INFO L87 Difference]: Start difference. First operand 591 states and 1273 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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) [2021-08-06 15:15:30,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:30,010 INFO L93 Difference]: Finished difference Result 1023 states and 2130 transitions. [2021-08-06 15:15:30,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:15:30,010 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:15:30,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:30,012 INFO L225 Difference]: With dead ends: 1023 [2021-08-06 15:15:30,012 INFO L226 Difference]: Without dead ends: 976 [2021-08-06 15:15:30,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1196.4ms TimeCoverageRelationStatistics Valid=434, Invalid=2872, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:15:30,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-08-06 15:15:30,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 607. [2021-08-06 15:15:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.1617161716171616) internal successors, (1310), 606 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:30,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1310 transitions. [2021-08-06 15:15:30,020 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1310 transitions. Word has length 29 [2021-08-06 15:15:30,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:30,020 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 1310 transitions. [2021-08-06 15:15:30,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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) [2021-08-06 15:15:30,020 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1310 transitions. [2021-08-06 15:15:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:15:30,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:30,021 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:30,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 15:15:30,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:30,225 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:15:30,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:30,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1093730631, now seen corresponding path program 58 times [2021-08-06 15:15:30,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:30,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226004555] [2021-08-06 15:15:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:30,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:15:30,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:30,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226004555] [2021-08-06 15:15:30,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226004555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:30,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676151956] [2021-08-06 15:15:30,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:15:30,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:30,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:30,497 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) [2021-08-06 15:15:30,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 15:15:33,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:15:33,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:33,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:15:33,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:34,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676151956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:34,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:34,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-06 15:15:34,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649855672] [2021-08-06 15:15:34,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:15:34,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:34,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:15:34,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:15:34,444 INFO L87 Difference]: Start difference. First operand 607 states and 1310 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:35,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:35,208 INFO L93 Difference]: Finished difference Result 679 states and 1433 transitions. [2021-08-06 15:15:35,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:15:35,208 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:15:35,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:35,209 INFO L225 Difference]: With dead ends: 679 [2021-08-06 15:15:35,209 INFO L226 Difference]: Without dead ends: 611 [2021-08-06 15:15:35,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 954.0ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 15:15:35,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-08-06 15:15:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 580. [2021-08-06 15:15:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 2.01727115716753) internal successors, (1168), 579 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1168 transitions. [2021-08-06 15:15:35,215 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1168 transitions. Word has length 29 [2021-08-06 15:15:35,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:35,215 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 1168 transitions. [2021-08-06 15:15:35,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1168 transitions. [2021-08-06 15:15:35,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:15:35,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:35,216 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:35,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 15:15:35,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 15:15:35,422 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:15:35,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:35,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1088451893, now seen corresponding path program 59 times [2021-08-06 15:15:35,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:35,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588289958] [2021-08-06 15:15:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:35,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:15:35,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:35,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588289958] [2021-08-06 15:15:35,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588289958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:35,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152182129] [2021-08-06 15:15:35,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:15:35,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:35,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:35,700 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) [2021-08-06 15:15:35,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 15:15:39,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:15:39,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:39,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:15:39,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:39,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152182129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:39,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:39,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-06 15:15:39,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405909229] [2021-08-06 15:15:39,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:15:39,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:39,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:15:39,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:15:39,820 INFO L87 Difference]: Start difference. First operand 580 states and 1168 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:41,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:41,028 INFO L93 Difference]: Finished difference Result 708 states and 1416 transitions. [2021-08-06 15:15:41,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:15:41,028 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:15:41,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:41,030 INFO L225 Difference]: With dead ends: 708 [2021-08-06 15:15:41,030 INFO L226 Difference]: Without dead ends: 684 [2021-08-06 15:15:41,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1257.0ms TimeCoverageRelationStatistics Valid=540, Invalid=3750, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 15:15:41,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-08-06 15:15:41,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 588. [2021-08-06 15:15:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.0034071550255534) internal successors, (1176), 587 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:41,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1176 transitions. [2021-08-06 15:15:41,036 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1176 transitions. Word has length 29 [2021-08-06 15:15:41,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:41,036 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1176 transitions. [2021-08-06 15:15:41,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:41,037 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1176 transitions. [2021-08-06 15:15:41,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:15:41,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:41,037 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:41,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 15:15:41,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-06 15:15:41,238 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:15:41,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:41,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1127221575, now seen corresponding path program 60 times [2021-08-06 15:15:41,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:41,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820890778] [2021-08-06 15:15:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:41,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:15:41,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:41,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820890778] [2021-08-06 15:15:41,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820890778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:41,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209891662] [2021-08-06 15:15:41,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:15:41,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:41,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:41,489 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) [2021-08-06 15:15:41,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 15:15:44,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:15:44,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:44,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:15:44,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:45,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209891662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:45,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:45,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-08-06 15:15:45,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631606965] [2021-08-06 15:15:45,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:15:45,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:45,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:15:45,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:15:45,624 INFO L87 Difference]: Start difference. First operand 588 states and 1176 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:47,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:47,041 INFO L93 Difference]: Finished difference Result 764 states and 1518 transitions. [2021-08-06 15:15:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:15:47,042 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:15:47,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:47,043 INFO L225 Difference]: With dead ends: 764 [2021-08-06 15:15:47,043 INFO L226 Difference]: Without dead ends: 738 [2021-08-06 15:15:47,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 1382.1ms TimeCoverageRelationStatistics Valid=617, Invalid=3939, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 15:15:47,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-08-06 15:15:47,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 454. [2021-08-06 15:15:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.988962472406181) internal successors, (901), 453 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 901 transitions. [2021-08-06 15:15:47,049 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 901 transitions. Word has length 29 [2021-08-06 15:15:47,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:47,049 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 901 transitions. [2021-08-06 15:15:47,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:47,049 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 901 transitions. [2021-08-06 15:15:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:15:47,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:47,050 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:47,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 15:15:47,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-06 15:15:47,251 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:15:47,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:47,251 INFO L82 PathProgramCache]: Analyzing trace with hash -765272223, now seen corresponding path program 61 times [2021-08-06 15:15:47,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:47,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034148208] [2021-08-06 15:15:47,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:47,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:15:47,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:47,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034148208] [2021-08-06 15:15:47,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034148208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:47,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671684146] [2021-08-06 15:15:47,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:15:47,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:47,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:47,535 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) [2021-08-06 15:15:47,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 15:15:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:50,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:15:50,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:51,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671684146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:51,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:51,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-08-06 15:15:51,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818277285] [2021-08-06 15:15:51,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:15:51,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:51,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:15:51,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:15:51,722 INFO L87 Difference]: Start difference. First operand 454 states and 901 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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) [2021-08-06 15:15:52,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:52,560 INFO L93 Difference]: Finished difference Result 701 states and 1384 transitions. [2021-08-06 15:15:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 15:15:52,560 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:15:52,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:52,561 INFO L225 Difference]: With dead ends: 701 [2021-08-06 15:15:52,561 INFO L226 Difference]: Without dead ends: 676 [2021-08-06 15:15:52,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 912.6ms TimeCoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:15:52,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-08-06 15:15:52,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 512. [2021-08-06 15:15:52,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.990215264187867) internal successors, (1017), 511 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1017 transitions. [2021-08-06 15:15:52,567 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1017 transitions. Word has length 29 [2021-08-06 15:15:52,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:52,567 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1017 transitions. [2021-08-06 15:15:52,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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) [2021-08-06 15:15:52,567 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1017 transitions. [2021-08-06 15:15:52,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:15:52,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:52,568 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:52,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 15:15:52,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:52,789 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:15:52,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:52,789 INFO L82 PathProgramCache]: Analyzing trace with hash 110491549, now seen corresponding path program 62 times [2021-08-06 15:15:52,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:52,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560020286] [2021-08-06 15:15:52,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:52,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:53,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:53,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560020286] [2021-08-06 15:15:53,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560020286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:53,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886059237] [2021-08-06 15:15:53,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:15:53,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:53,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:53,041 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) [2021-08-06 15:15:53,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 15:15:56,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:15:56,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:15:56,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:15:56,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:15:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:57,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886059237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:57,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:15:57,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-08-06 15:15:57,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862538396] [2021-08-06 15:15:57,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 15:15:57,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:15:57,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 15:15:57,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:15:57,255 INFO L87 Difference]: Start difference. First operand 512 states and 1017 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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) [2021-08-06 15:15:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:15:58,436 INFO L93 Difference]: Finished difference Result 731 states and 1449 transitions. [2021-08-06 15:15:58,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:15:58,436 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:15:58,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:15:58,437 INFO L225 Difference]: With dead ends: 731 [2021-08-06 15:15:58,437 INFO L226 Difference]: Without dead ends: 702 [2021-08-06 15:15:58,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1229.8ms TimeCoverageRelationStatistics Valid=356, Invalid=2614, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 15:15:58,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-08-06 15:15:58,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 317. [2021-08-06 15:15:58,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.981012658227848) internal successors, (626), 316 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:15:58,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 626 transitions. [2021-08-06 15:15:58,443 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 626 transitions. Word has length 29 [2021-08-06 15:15:58,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:15:58,443 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 626 transitions. [2021-08-06 15:15:58,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 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) [2021-08-06 15:15:58,443 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 626 transitions. [2021-08-06 15:15:58,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:15:58,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:15:58,443 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:15:58,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 15:15:58,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:58,664 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 15:15:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:15:58,664 INFO L82 PathProgramCache]: Analyzing trace with hash -859449887, now seen corresponding path program 63 times [2021-08-06 15:15:58,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:15:58,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941559930] [2021-08-06 15:15:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:15:58,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:15:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:15:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:15:58,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:15:58,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941559930] [2021-08-06 15:15:58,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941559930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:15:58,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513275379] [2021-08-06 15:15:58,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:15:58,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:15:58,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:15:58,912 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) [2021-08-06 15:15:58,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 15:16:02,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:16:02,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:16:02,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:16:02,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:16:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:16:03,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513275379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:16:03,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:16:03,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-08-06 15:16:03,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657171808] [2021-08-06 15:16:03,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:16:03,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:16:03,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:16:03,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:16:03,077 INFO L87 Difference]: Start difference. First operand 317 states and 626 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-08-06 15:16:04,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:16:04,105 INFO L93 Difference]: Finished difference Result 382 states and 749 transitions. [2021-08-06 15:16:04,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:16:04,105 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:16:04,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:16:04,105 INFO L225 Difference]: With dead ends: 382 [2021-08-06 15:16:04,105 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 15:16:04,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1044.0ms TimeCoverageRelationStatistics Valid=363, Invalid=2717, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 15:16:04,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 15:16:04,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 15:16:04,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:16:04,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 15:16:04,106 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-08-06 15:16:04,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:16:04,106 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 15:16:04,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 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) [2021-08-06 15:16:04,106 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 15:16:04,106 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 15:16:04,108 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 15:16:04,108 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 15:16:04,108 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 15:16:04,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 15:16:04,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 15:16:04,318 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 15:16:04,319 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 15:16:04,320 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 03:16:04 BasicIcfg [2021-08-06 15:16:04,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 15:16:04,320 INFO L168 Benchmark]: Toolchain (without parser) took 241556.61 ms. Allocated memory was 204.5 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 184.1 MB in the beginning and 192.0 MB in the end (delta: -7.9 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-08-06 15:16:04,321 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 204.5 MB. Free memory is still 185.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:16:04,321 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.48 ms. Allocated memory is still 204.5 MB. Free memory was 183.9 MB in the beginning and 182.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:16:04,321 INFO L168 Benchmark]: Boogie Preprocessor took 13.04 ms. Allocated memory is still 204.5 MB. Free memory was 182.6 MB in the beginning and 181.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:16:04,321 INFO L168 Benchmark]: RCFGBuilder took 172.95 ms. Allocated memory is still 204.5 MB. Free memory was 181.5 MB in the beginning and 169.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-06 15:16:04,321 INFO L168 Benchmark]: TraceAbstraction took 241344.52 ms. Allocated memory was 204.5 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 168.9 MB in the beginning and 192.0 MB in the end (delta: -23.1 MB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-08-06 15:16:04,321 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 0.09 ms. Allocated memory is still 204.5 MB. Free memory is still 185.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.48 ms. Allocated memory is still 204.5 MB. Free memory was 183.9 MB in the beginning and 182.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.04 ms. Allocated memory is still 204.5 MB. Free memory was 182.6 MB in the beginning and 181.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 172.95 ms. Allocated memory is still 204.5 MB. Free memory was 181.5 MB in the beginning and 169.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 241344.52 ms. Allocated memory was 204.5 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 168.9 MB in the beginning and 192.0 MB in the end (delta: -23.1 MB). Peak memory consumption was 1.0 GB. 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 - PositiveResult [Line: 55]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 241247.5ms, OverallIterations: 65, TraceHistogramMax: 4, EmptinessCheckTime: 45.3ms, AutomataDifference: 62439.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1323 SDtfs, 8374 SDslu, 14366 SDs, 0 SdLazy, 47580 SolverSat, 4125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18600.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4275 GetRequests, 866 SyntacticMatches, 86 SemanticMatches, 3323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56996 ImplicationChecksByTransitivity, 61625.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=607occurred in iteration=59, InterpolantAutomatonStates: 2593, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 354.5ms AutomataMinimizationTime, 65 MinimizatonAttempts, 10312 StatesRemovedByMinimization, 63 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 165.2ms SsaConstructionTime, 657.4ms SatisfiabilityAnalysisTime, 64500.8ms InterpolantComputationTime, 3377 NumberOfCodeBlocks, 3377 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 3250 ConstructedInterpolants, 0 QuantifiedInterpolants, 55227 SizeOfPredicates, 310 NumberOfNonLiveVariables, 2754 ConjunctsInSsa, 1275 ConjunctsInUnsatCore, 127 InterpolantComputations, 3 PerfectInterpolantSequences, 67/1839 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-06 15:16:04,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...