/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/mult-comm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 15:27:12,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 15:27:12,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 15:27:12,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 15:27:12,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 15:27:12,577 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 15:27:12,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 15:27:12,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 15:27:12,578 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 15:27:12,578 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 15:27:12,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 15:27:12,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 15:27:12,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 15:27:12,579 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 15:27:12,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 15:27:12,580 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 15:27:12,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 15:27:12,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 15:27:12,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 15:27:12,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 15:27:12,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 15:27:12,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 15:27:12,580 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 15:27:12,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 15:27:12,580 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 15:27:12,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 15:27:12,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 15:27:12,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 15:27:12,581 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 15:27:12,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 15:27:12,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 15:27:12,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 15:27:12,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 15:27:12,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 15:27:12,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 15:27:12,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 15:27:12,582 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 15:27:12,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 15:27:12,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 15:27:12,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 15:27:12,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 15:27:12,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 15:27:12,816 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 15:27:12,817 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 15:27:12,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl [2022-03-15 15:27:12,818 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl' [2022-03-15 15:27:12,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 15:27:12,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 15:27:12,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 15:27:12,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 15:27:12,838 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 15:27:12,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:12" (1/1) ... [2022-03-15 15:27:12,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:12" (1/1) ... [2022-03-15 15:27:12,855 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 15:27:12,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 15:27:12,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 15:27:12,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 15:27:12,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 15:27:12,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:12" (1/1) ... [2022-03-15 15:27:12,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:12" (1/1) ... [2022-03-15 15:27:12,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:12" (1/1) ... [2022-03-15 15:27:12,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:12" (1/1) ... [2022-03-15 15:27:12,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:12" (1/1) ... [2022-03-15 15:27:12,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:12" (1/1) ... [2022-03-15 15:27:12,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:12" (1/1) ... [2022-03-15 15:27:12,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 15:27:12,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 15:27:12,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 15:27:12,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 15:27:12,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:12" (1/1) ... [2022-03-15 15:27:12,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 15:27:12,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:12,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 15:27:12,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 15:27:12,928 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 15:27:12,929 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 15:27:12,929 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 15:27:12,929 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 15:27:12,929 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 15:27:12,929 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 15:27:12,929 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 15:27:12,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 15:27:12,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 15:27:12,930 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 15:27:12,965 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 15:27:12,966 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 15:27:13,065 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 15:27:13,074 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 15:27:13,074 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 15:27:13,075 INFO L202 PluginConnector]: Adding new model mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 03:27:13 BoogieIcfgContainer [2022-03-15 15:27:13,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 15:27:13,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 15:27:13,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 15:27:13,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 15:27:13,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 03:27:12" (1/2) ... [2022-03-15 15:27:13,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f318db and model type mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 03:27:13, skipping insertion in model container [2022-03-15 15:27:13,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 03:27:13" (2/2) ... [2022-03-15 15:27:13,083 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.bpl [2022-03-15 15:27:13,091 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 15:27:13,091 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 15:27:13,091 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 15:27:13,091 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 15:27:13,131 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 15:27:13,171 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 15:27:13,179 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 15:27:13,179 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 15:27:13,188 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2022-03-15 15:27:13,211 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:13,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:13,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 15:27:13,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:13,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:13,218 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:13,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:13,222 INFO L85 PathProgramCache]: Analyzing trace with hash 250888984, now seen corresponding path program 1 times [2022-03-15 15:27:13,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:13,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786174376] [2022-03-15 15:27:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:13,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:13,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:13,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786174376] [2022-03-15 15:27:13,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786174376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 15:27:13,353 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 15:27:13,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 15:27:13,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010089301] [2022-03-15 15:27:13,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 15:27:13,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 15:27:13,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:13,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 15:27:13,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:27:13,374 INFO L87 Difference]: Start difference. First operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:13,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:13,412 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2022-03-15 15:27:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 15:27:13,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-15 15:27:13,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:13,421 INFO L225 Difference]: With dead ends: 54 [2022-03-15 15:27:13,421 INFO L226 Difference]: Without dead ends: 47 [2022-03-15 15:27:13,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 15:27:13,424 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:13,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:27:13,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-15 15:27:13,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2022-03-15 15:27:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2022-03-15 15:27:13,466 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2022-03-15 15:27:13,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:13,467 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2022-03-15 15:27:13,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:13,467 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2022-03-15 15:27:13,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 15:27:13,468 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:13,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:13,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 15:27:13,468 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:13,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:13,478 INFO L85 PathProgramCache]: Analyzing trace with hash -97245286, now seen corresponding path program 1 times [2022-03-15 15:27:13,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:13,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802006220] [2022-03-15 15:27:13,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:13,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:13,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:13,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802006220] [2022-03-15 15:27:13,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802006220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:13,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999281246] [2022-03-15 15:27:13,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:13,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:13,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:13,677 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:13,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 15:27:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:13,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:13,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:13,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:13,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999281246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:13,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:13,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-03-15 15:27:13,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644309072] [2022-03-15 15:27:13,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:13,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 15:27:13,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:13,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 15:27:13,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-15 15:27:13,938 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:14,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:14,100 INFO L93 Difference]: Finished difference Result 97 states and 181 transitions. [2022-03-15 15:27:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:27:14,101 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 15:27:14,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:14,104 INFO L225 Difference]: With dead ends: 97 [2022-03-15 15:27:14,104 INFO L226 Difference]: Without dead ends: 72 [2022-03-15 15:27:14,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:27:14,106 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:14,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 68 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-15 15:27:14,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 41. [2022-03-15 15:27:14,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2022-03-15 15:27:14,127 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 13 [2022-03-15 15:27:14,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:14,128 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2022-03-15 15:27:14,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:14,128 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2022-03-15 15:27:14,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 15:27:14,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:14,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:14,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 15:27:14,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:14,329 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:14,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:14,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1927085850, now seen corresponding path program 1 times [2022-03-15 15:27:14,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:14,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195818137] [2022-03-15 15:27:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:14,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:14,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:14,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195818137] [2022-03-15 15:27:14,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195818137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:14,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616402505] [2022-03-15 15:27:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:14,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:14,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:14,429 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:14,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 15:27:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:14,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:14,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:14,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:14,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616402505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:14,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:14,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-03-15 15:27:14,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039125646] [2022-03-15 15:27:14,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:14,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 15:27:14,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:14,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 15:27:14,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-15 15:27:14,632 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:14,684 INFO L93 Difference]: Finished difference Result 95 states and 173 transitions. [2022-03-15 15:27:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:27:14,684 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 15:27:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:14,685 INFO L225 Difference]: With dead ends: 95 [2022-03-15 15:27:14,685 INFO L226 Difference]: Without dead ends: 75 [2022-03-15 15:27:14,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-03-15 15:27:14,685 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:14,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 67 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:27:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-15 15:27:14,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 51. [2022-03-15 15:27:14,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.06) internal successors, (103), 50 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 103 transitions. [2022-03-15 15:27:14,690 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 103 transitions. Word has length 13 [2022-03-15 15:27:14,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:14,690 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 103 transitions. [2022-03-15 15:27:14,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 103 transitions. [2022-03-15 15:27:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 15:27:14,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:14,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:14,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:14,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-15 15:27:14,910 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:14,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:14,911 INFO L85 PathProgramCache]: Analyzing trace with hash -671308006, now seen corresponding path program 2 times [2022-03-15 15:27:14,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:14,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573991] [2022-03-15 15:27:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:14,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:15,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:15,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573991] [2022-03-15 15:27:15,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573991] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:15,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604712127] [2022-03-15 15:27:15,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:15,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:15,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:15,018 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:15,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:15,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:15,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 15:27:15,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:15,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 15:27:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:15,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:15,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:15,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604712127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:15,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:15,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-03-15 15:27:15,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809064670] [2022-03-15 15:27:15,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:15,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 15:27:15,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:15,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 15:27:15,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-15 15:27:15,198 INFO L87 Difference]: Start difference. First operand 51 states and 103 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:15,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:15,309 INFO L93 Difference]: Finished difference Result 104 states and 194 transitions. [2022-03-15 15:27:15,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 15:27:15,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 15:27:15,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:15,312 INFO L225 Difference]: With dead ends: 104 [2022-03-15 15:27:15,312 INFO L226 Difference]: Without dead ends: 80 [2022-03-15 15:27:15,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2022-03-15 15:27:15,314 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:15,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 63 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 15:27:15,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-15 15:27:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 49. [2022-03-15 15:27:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 48 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:15,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 100 transitions. [2022-03-15 15:27:15,328 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 100 transitions. Word has length 13 [2022-03-15 15:27:15,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:15,328 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 100 transitions. [2022-03-15 15:27:15,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 100 transitions. [2022-03-15 15:27:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:15,328 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:15,328 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:15,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:15,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:15,541 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:15,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:15,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1917465828, now seen corresponding path program 1 times [2022-03-15 15:27:15,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:15,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934554912] [2022-03-15 15:27:15,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:15,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:15,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:15,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934554912] [2022-03-15 15:27:15,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934554912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:15,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008396972] [2022-03-15 15:27:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:15,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:15,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:15,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:15,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 15:27:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:15,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:15,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:15,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:16,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008396972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:16,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:16,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-15 15:27:16,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847087801] [2022-03-15 15:27:16,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:16,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:27:16,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:16,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:27:16,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:27:16,139 INFO L87 Difference]: Start difference. First operand 49 states and 100 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:16,412 INFO L93 Difference]: Finished difference Result 94 states and 176 transitions. [2022-03-15 15:27:16,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:27:16,412 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:16,413 INFO L225 Difference]: With dead ends: 94 [2022-03-15 15:27:16,413 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 15:27:16,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:27:16,414 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:16,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 69 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:16,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 15:27:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 53. [2022-03-15 15:27:16,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 52 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:16,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 106 transitions. [2022-03-15 15:27:16,417 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 106 transitions. Word has length 15 [2022-03-15 15:27:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:16,417 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 106 transitions. [2022-03-15 15:27:16,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:16,418 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 106 transitions. [2022-03-15 15:27:16,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:16,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:16,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:16,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:16,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:16,619 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:16,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1994781080, now seen corresponding path program 2 times [2022-03-15 15:27:16,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:16,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822402817] [2022-03-15 15:27:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:16,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:16,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:16,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822402817] [2022-03-15 15:27:16,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822402817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:16,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171767992] [2022-03-15 15:27:16,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:16,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:16,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:16,736 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:16,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 15:27:16,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:16,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:16,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:16,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:16,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:17,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171767992] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:17,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:17,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-15 15:27:17,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760846852] [2022-03-15 15:27:17,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:17,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:27:17,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:17,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:27:17,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:27:17,138 INFO L87 Difference]: Start difference. First operand 53 states and 106 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:17,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:17,413 INFO L93 Difference]: Finished difference Result 94 states and 176 transitions. [2022-03-15 15:27:17,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:27:17,413 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:17,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:17,414 INFO L225 Difference]: With dead ends: 94 [2022-03-15 15:27:17,414 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 15:27:17,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:27:17,414 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:17,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 100 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 15:27:17,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 54. [2022-03-15 15:27:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2022-03-15 15:27:17,417 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 15 [2022-03-15 15:27:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:17,417 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2022-03-15 15:27:17,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:17,418 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2022-03-15 15:27:17,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:17,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:17,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:17,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:17,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:17,631 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:17,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:17,632 INFO L85 PathProgramCache]: Analyzing trace with hash -220892388, now seen corresponding path program 3 times [2022-03-15 15:27:17,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:17,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651392911] [2022-03-15 15:27:17,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:17,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:17,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:17,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651392911] [2022-03-15 15:27:17,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651392911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:17,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993075925] [2022-03-15 15:27:17,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:27:17,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:17,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:17,742 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:17,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 15:27:17,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:27:17,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:17,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:17,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:18,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993075925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:18,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:18,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-15 15:27:18,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919383308] [2022-03-15 15:27:18,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:18,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:27:18,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:18,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:27:18,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:27:18,101 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:18,653 INFO L93 Difference]: Finished difference Result 129 states and 240 transitions. [2022-03-15 15:27:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 15:27:18,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:18,654 INFO L225 Difference]: With dead ends: 129 [2022-03-15 15:27:18,654 INFO L226 Difference]: Without dead ends: 122 [2022-03-15 15:27:18,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 15:27:18,655 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:18,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 97 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-15 15:27:18,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 55. [2022-03-15 15:27:18,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:18,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 113 transitions. [2022-03-15 15:27:18,658 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 113 transitions. Word has length 15 [2022-03-15 15:27:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:18,658 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 113 transitions. [2022-03-15 15:27:18,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:18,659 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 113 transitions. [2022-03-15 15:27:18,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:18,659 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:18,659 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:18,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-15 15:27:18,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:18,871 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:18,872 INFO L85 PathProgramCache]: Analyzing trace with hash -205431592, now seen corresponding path program 4 times [2022-03-15 15:27:18,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:18,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066767202] [2022-03-15 15:27:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:18,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:18,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:18,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066767202] [2022-03-15 15:27:18,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066767202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:18,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515623042] [2022-03-15 15:27:18,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:27:18,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:18,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:18,982 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:18,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 15:27:19,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:27:19,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:19,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:19,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:19,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:19,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515623042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:19,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:19,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-15 15:27:19,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140874872] [2022-03-15 15:27:19,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:19,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:27:19,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:19,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:27:19,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:27:19,393 INFO L87 Difference]: Start difference. First operand 55 states and 113 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:19,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:19,809 INFO L93 Difference]: Finished difference Result 115 states and 220 transitions. [2022-03-15 15:27:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:27:19,810 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:19,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:19,810 INFO L225 Difference]: With dead ends: 115 [2022-03-15 15:27:19,810 INFO L226 Difference]: Without dead ends: 108 [2022-03-15 15:27:19,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:27:19,811 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:19,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 83 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:19,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-15 15:27:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 55. [2022-03-15 15:27:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:19,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 113 transitions. [2022-03-15 15:27:19,814 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 113 transitions. Word has length 15 [2022-03-15 15:27:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:19,814 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 113 transitions. [2022-03-15 15:27:19,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 113 transitions. [2022-03-15 15:27:19,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:19,815 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:19,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:19,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:20,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:20,023 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:20,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:20,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1287493684, now seen corresponding path program 5 times [2022-03-15 15:27:20,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:20,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606788650] [2022-03-15 15:27:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:20,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:20,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:20,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606788650] [2022-03-15 15:27:20,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606788650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:20,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360507043] [2022-03-15 15:27:20,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:27:20,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:20,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:20,140 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:20,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 15:27:20,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:20,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:20,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:20,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:20,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:20,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360507043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:20,608 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:20,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-03-15 15:27:20,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924655615] [2022-03-15 15:27:20,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:20,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:27:20,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:20,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:27:20,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:27:20,611 INFO L87 Difference]: Start difference. First operand 55 states and 113 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:20,823 INFO L93 Difference]: Finished difference Result 81 states and 159 transitions. [2022-03-15 15:27:20,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:27:20,826 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:20,826 INFO L225 Difference]: With dead ends: 81 [2022-03-15 15:27:20,826 INFO L226 Difference]: Without dead ends: 74 [2022-03-15 15:27:20,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:27:20,829 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:20,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 90 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:20,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-15 15:27:20,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 57. [2022-03-15 15:27:20,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.107142857142857) internal successors, (118), 56 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:20,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 118 transitions. [2022-03-15 15:27:20,836 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 118 transitions. Word has length 15 [2022-03-15 15:27:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:20,837 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 118 transitions. [2022-03-15 15:27:20,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:20,837 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 118 transitions. [2022-03-15 15:27:20,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:20,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:20,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:20,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:21,046 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,SelfDestructingSolverStorable8 [2022-03-15 15:27:21,047 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:21,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash 791800144, now seen corresponding path program 6 times [2022-03-15 15:27:21,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:21,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816504246] [2022-03-15 15:27:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:21,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:21,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:21,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816504246] [2022-03-15 15:27:21,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816504246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:21,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849243293] [2022-03-15 15:27:21,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:27:21,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:21,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:21,141 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:21,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 15:27:21,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:27:21,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:21,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:21,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:21,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:21,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849243293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:21,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:21,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-03-15 15:27:21,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456750378] [2022-03-15 15:27:21,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:21,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:27:21,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:21,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:27:21,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:27:21,560 INFO L87 Difference]: Start difference. First operand 57 states and 118 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:21,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:21,897 INFO L93 Difference]: Finished difference Result 118 states and 226 transitions. [2022-03-15 15:27:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:27:21,898 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:21,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:21,898 INFO L225 Difference]: With dead ends: 118 [2022-03-15 15:27:21,898 INFO L226 Difference]: Without dead ends: 111 [2022-03-15 15:27:21,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:27:21,899 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:21,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 97 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:21,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-15 15:27:21,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 58. [2022-03-15 15:27:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.1403508771929824) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:21,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 122 transitions. [2022-03-15 15:27:21,902 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 122 transitions. Word has length 15 [2022-03-15 15:27:21,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:21,902 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 122 transitions. [2022-03-15 15:27:21,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:21,902 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 122 transitions. [2022-03-15 15:27:21,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:21,903 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:21,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:21,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-15 15:27:22,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-15 15:27:22,115 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:22,116 INFO L85 PathProgramCache]: Analyzing trace with hash 807260940, now seen corresponding path program 7 times [2022-03-15 15:27:22,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:22,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115529092] [2022-03-15 15:27:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:22,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:22,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:22,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115529092] [2022-03-15 15:27:22,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115529092] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:22,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387668840] [2022-03-15 15:27:22,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:27:22,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:22,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:22,206 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:22,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 15:27:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:22,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:22,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:22,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:22,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387668840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:22,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:22,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-03-15 15:27:22,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667406487] [2022-03-15 15:27:22,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:22,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:27:22,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:22,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:27:22,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:27:22,596 INFO L87 Difference]: Start difference. First operand 58 states and 122 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:22,954 INFO L93 Difference]: Finished difference Result 104 states and 206 transitions. [2022-03-15 15:27:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:27:22,954 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:22,954 INFO L225 Difference]: With dead ends: 104 [2022-03-15 15:27:22,954 INFO L226 Difference]: Without dead ends: 97 [2022-03-15 15:27:22,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:27:22,955 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:22,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 104 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:22,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-15 15:27:22,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 56. [2022-03-15 15:27:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 115 transitions. [2022-03-15 15:27:22,958 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 115 transitions. Word has length 15 [2022-03-15 15:27:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:22,958 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 115 transitions. [2022-03-15 15:27:22,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 115 transitions. [2022-03-15 15:27:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:22,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:22,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:22,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:23,171 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,SelfDestructingSolverStorable10 [2022-03-15 15:27:23,171 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:23,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1356996392, now seen corresponding path program 8 times [2022-03-15 15:27:23,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:23,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042031064] [2022-03-15 15:27:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:23,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:23,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:23,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:23,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042031064] [2022-03-15 15:27:23,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042031064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:23,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751921984] [2022-03-15 15:27:23,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:23,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:23,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:23,271 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:23,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 15:27:23,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:23,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:23,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:23,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:23,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:23,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751921984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:23,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:23,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-03-15 15:27:23,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908811328] [2022-03-15 15:27:23,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:23,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:27:23,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:23,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:27:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:27:23,647 INFO L87 Difference]: Start difference. First operand 56 states and 115 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:23,982 INFO L93 Difference]: Finished difference Result 107 states and 208 transitions. [2022-03-15 15:27:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:27:23,983 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:23,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:23,983 INFO L225 Difference]: With dead ends: 107 [2022-03-15 15:27:23,983 INFO L226 Difference]: Without dead ends: 100 [2022-03-15 15:27:23,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:27:23,984 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:23,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 85 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:23,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-15 15:27:23,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 58. [2022-03-15 15:27:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.1403508771929824) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 122 transitions. [2022-03-15 15:27:23,986 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 122 transitions. Word has length 15 [2022-03-15 15:27:23,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:23,987 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 122 transitions. [2022-03-15 15:27:23,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 122 transitions. [2022-03-15 15:27:23,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:23,987 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:23,987 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:24,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:24,199 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,SelfDestructingSolverStorable11 [2022-03-15 15:27:24,199 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:24,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:24,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1341535596, now seen corresponding path program 9 times [2022-03-15 15:27:24,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:24,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363086438] [2022-03-15 15:27:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:24,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:24,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:24,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363086438] [2022-03-15 15:27:24,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363086438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:24,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069959024] [2022-03-15 15:27:24,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:27:24,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:24,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:24,306 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:24,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 15:27:24,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:27:24,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:24,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:24,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:24,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:24,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069959024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:24,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:24,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-03-15 15:27:24,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579765423] [2022-03-15 15:27:24,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:24,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:27:24,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:24,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:27:24,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:27:24,678 INFO L87 Difference]: Start difference. First operand 58 states and 122 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:25,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:25,027 INFO L93 Difference]: Finished difference Result 114 states and 221 transitions. [2022-03-15 15:27:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:27:25,027 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:25,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:25,028 INFO L225 Difference]: With dead ends: 114 [2022-03-15 15:27:25,028 INFO L226 Difference]: Without dead ends: 107 [2022-03-15 15:27:25,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:27:25,028 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:25,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 105 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:25,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-15 15:27:25,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 57. [2022-03-15 15:27:25,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.107142857142857) internal successors, (118), 56 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:25,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 118 transitions. [2022-03-15 15:27:25,031 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 118 transitions. Word has length 15 [2022-03-15 15:27:25,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:25,031 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 118 transitions. [2022-03-15 15:27:25,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:25,031 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 118 transitions. [2022-03-15 15:27:25,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:25,032 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:25,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:25,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-15 15:27:25,239 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,SelfDestructingSolverStorable12 [2022-03-15 15:27:25,239 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:25,240 INFO L85 PathProgramCache]: Analyzing trace with hash -770080790, now seen corresponding path program 10 times [2022-03-15 15:27:25,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:25,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478764736] [2022-03-15 15:27:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:25,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:25,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:25,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478764736] [2022-03-15 15:27:25,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478764736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:25,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151207976] [2022-03-15 15:27:25,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:27:25,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:25,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:25,325 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:25,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 15:27:25,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:27:25,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:25,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:25,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:25,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:25,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151207976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:25,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:25,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-03-15 15:27:25,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022152591] [2022-03-15 15:27:25,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:25,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:27:25,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:25,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:27:25,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:27:25,686 INFO L87 Difference]: Start difference. First operand 57 states and 118 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:25,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:25,854 INFO L93 Difference]: Finished difference Result 84 states and 166 transitions. [2022-03-15 15:27:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:27:25,854 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:25,855 INFO L225 Difference]: With dead ends: 84 [2022-03-15 15:27:25,855 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 15:27:25,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:27:25,856 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:25,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 77 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:25,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 15:27:25,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2022-03-15 15:27:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:25,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 123 transitions. [2022-03-15 15:27:25,858 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 123 transitions. Word has length 15 [2022-03-15 15:27:25,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:25,858 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 123 transitions. [2022-03-15 15:27:25,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:25,858 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 123 transitions. [2022-03-15 15:27:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:25,858 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:25,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:25,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:26,059 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,SelfDestructingSolverStorable13 [2022-03-15 15:27:26,059 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:26,059 INFO L85 PathProgramCache]: Analyzing trace with hash -401695404, now seen corresponding path program 11 times [2022-03-15 15:27:26,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:26,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189628053] [2022-03-15 15:27:26,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:26,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:26,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:26,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189628053] [2022-03-15 15:27:26,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189628053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:26,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248097686] [2022-03-15 15:27:26,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:27:26,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:26,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:26,134 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:26,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 15:27:26,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:27:26,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:26,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:26,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:26,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:26,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248097686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:26,488 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:26,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-03-15 15:27:26,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826324507] [2022-03-15 15:27:26,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:26,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:27:26,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:26,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:27:26,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:27:26,489 INFO L87 Difference]: Start difference. First operand 60 states and 123 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:26,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:26,672 INFO L93 Difference]: Finished difference Result 85 states and 167 transitions. [2022-03-15 15:27:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:27:26,672 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:26,673 INFO L225 Difference]: With dead ends: 85 [2022-03-15 15:27:26,673 INFO L226 Difference]: Without dead ends: 78 [2022-03-15 15:27:26,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:27:26,673 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:26,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 89 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:26,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-15 15:27:26,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2022-03-15 15:27:26,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 128 transitions. [2022-03-15 15:27:26,675 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 128 transitions. Word has length 15 [2022-03-15 15:27:26,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:26,676 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 128 transitions. [2022-03-15 15:27:26,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:26,676 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 128 transitions. [2022-03-15 15:27:26,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:26,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:26,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:26,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:26,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:26,883 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:26,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1677598424, now seen corresponding path program 12 times [2022-03-15 15:27:26,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:26,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596267979] [2022-03-15 15:27:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:26,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:26,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:26,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596267979] [2022-03-15 15:27:26,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596267979] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:26,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920131298] [2022-03-15 15:27:26,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:27:26,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:26,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:26,983 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:27,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 15:27:27,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:27:27,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:27,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:27,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:27,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:27,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920131298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:27,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:27,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-03-15 15:27:27,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070131949] [2022-03-15 15:27:27,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:27,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:27:27,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:27,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:27:27,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:27:27,337 INFO L87 Difference]: Start difference. First operand 62 states and 128 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:27,701 INFO L93 Difference]: Finished difference Result 122 states and 234 transitions. [2022-03-15 15:27:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:27:27,701 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:27,702 INFO L225 Difference]: With dead ends: 122 [2022-03-15 15:27:27,702 INFO L226 Difference]: Without dead ends: 115 [2022-03-15 15:27:27,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:27:27,702 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 77 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:27,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 112 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-15 15:27:27,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 63. [2022-03-15 15:27:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.129032258064516) internal successors, (132), 62 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 132 transitions. [2022-03-15 15:27:27,707 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 132 transitions. Word has length 15 [2022-03-15 15:27:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:27,707 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 132 transitions. [2022-03-15 15:27:27,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 132 transitions. [2022-03-15 15:27:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:27,707 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:27,707 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:27,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:27,907 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,SelfDestructingSolverStorable15 [2022-03-15 15:27:27,908 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:27,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:27,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1693059220, now seen corresponding path program 13 times [2022-03-15 15:27:27,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:27,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582291020] [2022-03-15 15:27:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:27,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:28,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:28,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582291020] [2022-03-15 15:27:28,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582291020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:28,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754315150] [2022-03-15 15:27:28,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:27:28,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:28,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:28,012 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:28,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 15:27:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:28,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:28,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:28,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:28,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754315150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:28,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:28,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-03-15 15:27:28,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36433643] [2022-03-15 15:27:28,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:28,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:27:28,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:28,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:27:28,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:27:28,381 INFO L87 Difference]: Start difference. First operand 63 states and 132 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:28,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:28,703 INFO L93 Difference]: Finished difference Result 108 states and 214 transitions. [2022-03-15 15:27:28,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:27:28,703 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:28,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:28,704 INFO L225 Difference]: With dead ends: 108 [2022-03-15 15:27:28,704 INFO L226 Difference]: Without dead ends: 101 [2022-03-15 15:27:28,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:27:28,704 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 66 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:28,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 93 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:28,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-15 15:27:28,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 61. [2022-03-15 15:27:28,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 60 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 125 transitions. [2022-03-15 15:27:28,706 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 125 transitions. Word has length 15 [2022-03-15 15:27:28,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:28,707 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 125 transitions. [2022-03-15 15:27:28,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 125 transitions. [2022-03-15 15:27:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:28,707 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:28,707 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:28,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:28,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 15:27:28,908 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:28,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:28,908 INFO L85 PathProgramCache]: Analyzing trace with hash -471198112, now seen corresponding path program 14 times [2022-03-15 15:27:28,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:28,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90802397] [2022-03-15 15:27:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:28,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:28,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:28,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90802397] [2022-03-15 15:27:28,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90802397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:28,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598553674] [2022-03-15 15:27:28,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:28,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:28,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:28,997 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:28,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 15:27:29,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:29,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:29,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:29,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:29,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:29,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598553674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:29,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:29,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-03-15 15:27:29,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320730383] [2022-03-15 15:27:29,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:29,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:27:29,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:29,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:27:29,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:27:29,383 INFO L87 Difference]: Start difference. First operand 61 states and 125 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:29,707 INFO L93 Difference]: Finished difference Result 111 states and 216 transitions. [2022-03-15 15:27:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:27:29,707 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:29,707 INFO L225 Difference]: With dead ends: 111 [2022-03-15 15:27:29,708 INFO L226 Difference]: Without dead ends: 104 [2022-03-15 15:27:29,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:27:29,708 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:29,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 105 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-15 15:27:29,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 63. [2022-03-15 15:27:29,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.129032258064516) internal successors, (132), 62 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:29,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 132 transitions. [2022-03-15 15:27:29,710 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 132 transitions. Word has length 15 [2022-03-15 15:27:29,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:29,710 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 132 transitions. [2022-03-15 15:27:29,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:29,711 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 132 transitions. [2022-03-15 15:27:29,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:29,711 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:29,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:29,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-15 15:27:29,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 15:27:29,912 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:29,912 INFO L85 PathProgramCache]: Analyzing trace with hash -455737316, now seen corresponding path program 15 times [2022-03-15 15:27:29,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:29,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363970393] [2022-03-15 15:27:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:29,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:30,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:30,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363970393] [2022-03-15 15:27:30,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363970393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:30,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903194724] [2022-03-15 15:27:30,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:27:30,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:30,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:30,001 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:30,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 15:27:30,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 15:27:30,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:30,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:30,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:30,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:30,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903194724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:30,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:30,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-03-15 15:27:30,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387697794] [2022-03-15 15:27:30,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:30,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:27:30,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:30,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:27:30,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:27:30,325 INFO L87 Difference]: Start difference. First operand 63 states and 132 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:30,574 INFO L93 Difference]: Finished difference Result 118 states and 229 transitions. [2022-03-15 15:27:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 15:27:30,574 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:30,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:30,575 INFO L225 Difference]: With dead ends: 118 [2022-03-15 15:27:30,575 INFO L226 Difference]: Without dead ends: 111 [2022-03-15 15:27:30,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:27:30,577 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:30,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 111 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:30,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-15 15:27:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 62. [2022-03-15 15:27:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 128 transitions. [2022-03-15 15:27:30,579 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 128 transitions. Word has length 15 [2022-03-15 15:27:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:30,579 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 128 transitions. [2022-03-15 15:27:30,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:30,579 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 128 transitions. [2022-03-15 15:27:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:30,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:30,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:30,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:30,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:30,795 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:30,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:30,796 INFO L85 PathProgramCache]: Analyzing trace with hash 115717490, now seen corresponding path program 16 times [2022-03-15 15:27:30,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:30,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989849237] [2022-03-15 15:27:30,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:30,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:30,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:30,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989849237] [2022-03-15 15:27:30,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989849237] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:30,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675619458] [2022-03-15 15:27:30,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:27:30,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:30,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:30,881 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:30,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 15:27:30,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:27:30,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:30,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:30,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:31,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:31,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675619458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:31,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:31,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-03-15 15:27:31,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545860983] [2022-03-15 15:27:31,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:31,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 15:27:31,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:31,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 15:27:31,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-03-15 15:27:31,229 INFO L87 Difference]: Start difference. First operand 62 states and 128 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:31,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:31,345 INFO L93 Difference]: Finished difference Result 88 states and 174 transitions. [2022-03-15 15:27:31,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 15:27:31,346 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:31,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:31,347 INFO L225 Difference]: With dead ends: 88 [2022-03-15 15:27:31,347 INFO L226 Difference]: Without dead ends: 81 [2022-03-15 15:27:31,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-15 15:27:31,348 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:31,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 80 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:31,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-15 15:27:31,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2022-03-15 15:27:31,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:31,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 123 transitions. [2022-03-15 15:27:31,355 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 123 transitions. Word has length 15 [2022-03-15 15:27:31,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:31,355 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 123 transitions. [2022-03-15 15:27:31,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:31,355 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 123 transitions. [2022-03-15 15:27:31,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:31,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:31,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:31,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:31,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:31,571 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:31,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:31,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1565289700, now seen corresponding path program 17 times [2022-03-15 15:27:31,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:31,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147409148] [2022-03-15 15:27:31,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:31,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:31,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:31,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147409148] [2022-03-15 15:27:31,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147409148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:31,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086494799] [2022-03-15 15:27:31,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:27:31,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:31,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:31,656 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:31,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 15:27:31,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:27:31,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:31,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:31,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:31,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:31,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086494799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:31,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:31,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-15 15:27:31,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146299901] [2022-03-15 15:27:31,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:31,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:27:31,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:31,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:27:31,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:27:31,931 INFO L87 Difference]: Start difference. First operand 60 states and 123 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:32,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:32,274 INFO L93 Difference]: Finished difference Result 129 states and 242 transitions. [2022-03-15 15:27:32,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 15:27:32,274 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:32,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:32,275 INFO L225 Difference]: With dead ends: 129 [2022-03-15 15:27:32,275 INFO L226 Difference]: Without dead ends: 122 [2022-03-15 15:27:32,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2022-03-15 15:27:32,276 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 127 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:32,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 72 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:32,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-15 15:27:32,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 62. [2022-03-15 15:27:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:32,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 130 transitions. [2022-03-15 15:27:32,278 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 130 transitions. Word has length 15 [2022-03-15 15:27:32,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:32,278 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 130 transitions. [2022-03-15 15:27:32,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:32,278 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 130 transitions. [2022-03-15 15:27:32,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:32,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:32,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:32,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-15 15:27:32,490 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,SelfDestructingSolverStorable20 [2022-03-15 15:27:32,490 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:32,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:32,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1549828904, now seen corresponding path program 18 times [2022-03-15 15:27:32,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:32,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889752457] [2022-03-15 15:27:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:32,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:32,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:32,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889752457] [2022-03-15 15:27:32,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889752457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:32,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938263097] [2022-03-15 15:27:32,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:27:32,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:32,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:32,608 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:32,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 15:27:32,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 15:27:32,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:32,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:32,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:32,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:32,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938263097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:32,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:32,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-15 15:27:32,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891335733] [2022-03-15 15:27:32,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:32,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:27:32,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:32,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:27:32,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:27:32,997 INFO L87 Difference]: Start difference. First operand 62 states and 130 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:33,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:33,367 INFO L93 Difference]: Finished difference Result 136 states and 255 transitions. [2022-03-15 15:27:33,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 15:27:33,368 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:33,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:33,369 INFO L225 Difference]: With dead ends: 136 [2022-03-15 15:27:33,369 INFO L226 Difference]: Without dead ends: 129 [2022-03-15 15:27:33,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2022-03-15 15:27:33,370 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:33,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 101 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:33,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-15 15:27:33,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 61. [2022-03-15 15:27:33,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1) internal successors, (126), 60 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 126 transitions. [2022-03-15 15:27:33,375 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 126 transitions. Word has length 15 [2022-03-15 15:27:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:33,375 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 126 transitions. [2022-03-15 15:27:33,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:33,375 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 126 transitions. [2022-03-15 15:27:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:33,375 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:33,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:33,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:33,589 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,SelfDestructingSolverStorable21 [2022-03-15 15:27:33,590 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:33,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:33,590 INFO L85 PathProgramCache]: Analyzing trace with hash -978374098, now seen corresponding path program 19 times [2022-03-15 15:27:33,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:33,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051084379] [2022-03-15 15:27:33,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:33,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:33,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:33,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051084379] [2022-03-15 15:27:33,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051084379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:33,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731848533] [2022-03-15 15:27:33,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:27:33,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:33,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:33,658 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:33,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 15:27:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:33,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:33,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:33,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:33,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731848533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:33,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:33,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-15 15:27:33,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290476863] [2022-03-15 15:27:33,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:33,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:27:33,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:33,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:27:33,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:27:33,899 INFO L87 Difference]: Start difference. First operand 61 states and 126 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:34,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:34,079 INFO L93 Difference]: Finished difference Result 109 states and 205 transitions. [2022-03-15 15:27:34,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 15:27:34,080 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:34,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:34,080 INFO L225 Difference]: With dead ends: 109 [2022-03-15 15:27:34,080 INFO L226 Difference]: Without dead ends: 102 [2022-03-15 15:27:34,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:27:34,081 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 70 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:34,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 99 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:34,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-15 15:27:34,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 60. [2022-03-15 15:27:34,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:34,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 123 transitions. [2022-03-15 15:27:34,083 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 123 transitions. Word has length 15 [2022-03-15 15:27:34,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:34,083 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 123 transitions. [2022-03-15 15:27:34,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:34,083 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 123 transitions. [2022-03-15 15:27:34,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 15:27:34,083 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:34,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:34,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:34,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:34,299 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:34,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:34,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1516229676, now seen corresponding path program 20 times [2022-03-15 15:27:34,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:34,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619088886] [2022-03-15 15:27:34,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:34,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:34,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:34,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619088886] [2022-03-15 15:27:34,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619088886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:34,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622293502] [2022-03-15 15:27:34,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:34,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:34,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:34,365 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:34,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 15:27:34,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:34,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:34,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 15:27:34,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:34,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:34,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622293502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:34,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:34,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-15 15:27:34,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988425156] [2022-03-15 15:27:34,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:34,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 15:27:34,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:34,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 15:27:34,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-15 15:27:34,690 INFO L87 Difference]: Start difference. First operand 60 states and 123 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:34,929 INFO L93 Difference]: Finished difference Result 109 states and 205 transitions. [2022-03-15 15:27:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 15:27:34,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-15 15:27:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:34,931 INFO L225 Difference]: With dead ends: 109 [2022-03-15 15:27:34,932 INFO L226 Difference]: Without dead ends: 102 [2022-03-15 15:27:34,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:27:34,932 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 75 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:34,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 71 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:34,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-15 15:27:34,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2022-03-15 15:27:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:34,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 131 transitions. [2022-03-15 15:27:34,938 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 131 transitions. Word has length 15 [2022-03-15 15:27:34,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:34,938 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 131 transitions. [2022-03-15 15:27:34,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:34,938 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 131 transitions. [2022-03-15 15:27:34,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:34,939 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:34,939 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:34,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:35,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:35,147 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:35,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:35,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2202064, now seen corresponding path program 2 times [2022-03-15 15:27:35,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:35,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188137650] [2022-03-15 15:27:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:35,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:35,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:35,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188137650] [2022-03-15 15:27:35,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188137650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:35,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123591821] [2022-03-15 15:27:35,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:35,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:35,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:35,285 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:35,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 15:27:35,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:35,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:35,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:27:35,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:35,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:35,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123591821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:35,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:35,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-15 15:27:35,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651619670] [2022-03-15 15:27:35,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:35,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:27:35,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:35,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:27:35,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:27:35,589 INFO L87 Difference]: Start difference. First operand 65 states and 131 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:35,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:35,726 INFO L93 Difference]: Finished difference Result 108 states and 206 transitions. [2022-03-15 15:27:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:27:35,727 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:35,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:35,727 INFO L225 Difference]: With dead ends: 108 [2022-03-15 15:27:35,727 INFO L226 Difference]: Without dead ends: 76 [2022-03-15 15:27:35,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:27:35,728 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 95 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:35,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 110 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:27:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-15 15:27:35,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2022-03-15 15:27:35,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:35,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 127 transitions. [2022-03-15 15:27:35,732 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 127 transitions. Word has length 17 [2022-03-15 15:27:35,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:35,732 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 127 transitions. [2022-03-15 15:27:35,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:35,732 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 127 transitions. [2022-03-15 15:27:35,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:35,733 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:35,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:35,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:35,949 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,SelfDestructingSolverStorable24 [2022-03-15 15:27:35,949 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:35,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1435213470, now seen corresponding path program 21 times [2022-03-15 15:27:35,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:35,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469691976] [2022-03-15 15:27:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:35,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:36,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:36,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469691976] [2022-03-15 15:27:36,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469691976] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:36,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109395860] [2022-03-15 15:27:36,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:27:36,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:36,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:36,081 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:36,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 15:27:36,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:27:36,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:36,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:27:36,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:36,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:36,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109395860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:36,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:36,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:27:36,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588958483] [2022-03-15 15:27:36,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:36,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:27:36,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:36,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:27:36,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:27:36,529 INFO L87 Difference]: Start difference. First operand 64 states and 127 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:37,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:37,924 INFO L93 Difference]: Finished difference Result 192 states and 351 transitions. [2022-03-15 15:27:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 15:27:37,924 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:37,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:37,925 INFO L225 Difference]: With dead ends: 192 [2022-03-15 15:27:37,925 INFO L226 Difference]: Without dead ends: 178 [2022-03-15 15:27:37,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=543, Invalid=2879, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 15:27:37,926 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 183 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:37,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 146 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:37,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-15 15:27:37,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 82. [2022-03-15 15:27:37,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.074074074074074) internal successors, (168), 81 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 168 transitions. [2022-03-15 15:27:37,928 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 168 transitions. Word has length 17 [2022-03-15 15:27:37,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:37,928 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 168 transitions. [2022-03-15 15:27:37,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:37,929 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 168 transitions. [2022-03-15 15:27:37,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:37,929 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:37,929 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:37,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-15 15:27:38,135 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,SelfDestructingSolverStorable25 [2022-03-15 15:27:38,136 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:38,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:38,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1052493082, now seen corresponding path program 22 times [2022-03-15 15:27:38,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:38,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270783037] [2022-03-15 15:27:38,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:38,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:38,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:38,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270783037] [2022-03-15 15:27:38,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270783037] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:38,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652381553] [2022-03-15 15:27:38,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:27:38,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:38,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:38,227 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:38,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 15:27:38,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:27:38,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:38,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:27:38,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:38,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:38,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652381553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:38,707 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:38,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:27:38,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962399482] [2022-03-15 15:27:38,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:38,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:27:38,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:38,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:27:38,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:27:38,708 INFO L87 Difference]: Start difference. First operand 82 states and 168 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:39,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:39,940 INFO L93 Difference]: Finished difference Result 189 states and 351 transitions. [2022-03-15 15:27:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 15:27:39,940 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:39,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:39,941 INFO L225 Difference]: With dead ends: 189 [2022-03-15 15:27:39,941 INFO L226 Difference]: Without dead ends: 175 [2022-03-15 15:27:39,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=480, Invalid=2276, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 15:27:39,942 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 132 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:39,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 160 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:39,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-15 15:27:39,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 86. [2022-03-15 15:27:39,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 178 transitions. [2022-03-15 15:27:39,945 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 178 transitions. Word has length 17 [2022-03-15 15:27:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:39,945 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 178 transitions. [2022-03-15 15:27:39,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 178 transitions. [2022-03-15 15:27:39,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:39,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:39,945 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:39,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-15 15:27:40,155 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,SelfDestructingSolverStorable26 [2022-03-15 15:27:40,155 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:40,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:40,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1163180386, now seen corresponding path program 23 times [2022-03-15 15:27:40,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:40,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866451092] [2022-03-15 15:27:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:40,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:40,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:40,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866451092] [2022-03-15 15:27:40,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866451092] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:40,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400158650] [2022-03-15 15:27:40,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:27:40,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:40,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:40,277 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:40,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 15:27:40,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:27:40,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:40,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:27:40,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:40,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:40,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400158650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:40,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:40,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:27:40,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771614547] [2022-03-15 15:27:40,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:40,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:27:40,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:40,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:27:40,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:27:40,741 INFO L87 Difference]: Start difference. First operand 86 states and 178 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:42,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:42,572 INFO L93 Difference]: Finished difference Result 232 states and 432 transitions. [2022-03-15 15:27:42,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 15:27:42,573 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:42,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:42,574 INFO L225 Difference]: With dead ends: 232 [2022-03-15 15:27:42,574 INFO L226 Difference]: Without dead ends: 218 [2022-03-15 15:27:42,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=693, Invalid=3089, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 15:27:42,575 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 202 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:42,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 196 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:42,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-15 15:27:42,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 88. [2022-03-15 15:27:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1379310344827585) internal successors, (186), 87 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 186 transitions. [2022-03-15 15:27:42,578 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 186 transitions. Word has length 17 [2022-03-15 15:27:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:42,578 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 186 transitions. [2022-03-15 15:27:42,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 186 transitions. [2022-03-15 15:27:42,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:42,578 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:42,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:42,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:42,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 15:27:42,787 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:42,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:42,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1147719590, now seen corresponding path program 24 times [2022-03-15 15:27:42,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:42,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438470009] [2022-03-15 15:27:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:42,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:42,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:42,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438470009] [2022-03-15 15:27:42,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438470009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:42,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248395635] [2022-03-15 15:27:42,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:27:42,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:42,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:42,904 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:42,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:27:42,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:42,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:27:42,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:42,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 15:27:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:43,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:43,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248395635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:43,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:43,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:27:43,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9411738] [2022-03-15 15:27:43,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:43,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:27:43,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:43,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:27:43,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:27:43,373 INFO L87 Difference]: Start difference. First operand 88 states and 186 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:44,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:44,319 INFO L93 Difference]: Finished difference Result 197 states and 378 transitions. [2022-03-15 15:27:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 15:27:44,319 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:44,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:44,320 INFO L225 Difference]: With dead ends: 197 [2022-03-15 15:27:44,320 INFO L226 Difference]: Without dead ends: 183 [2022-03-15 15:27:44,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=487, Invalid=2063, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 15:27:44,321 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 176 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:44,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 144 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-15 15:27:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 87. [2022-03-15 15:27:44,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.116279069767442) internal successors, (182), 86 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 182 transitions. [2022-03-15 15:27:44,324 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 182 transitions. Word has length 17 [2022-03-15 15:27:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:44,324 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 182 transitions. [2022-03-15 15:27:44,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 182 transitions. [2022-03-15 15:27:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:44,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:44,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:44,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-15 15:27:44,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 15:27:44,541 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:44,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:44,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1995682906, now seen corresponding path program 25 times [2022-03-15 15:27:44,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:44,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092038051] [2022-03-15 15:27:44,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:44,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:44,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:44,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092038051] [2022-03-15 15:27:44,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092038051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:44,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786673349] [2022-03-15 15:27:44,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:27:44,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:44,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:44,651 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:44,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 15:27:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:44,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:27:44,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:44,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:45,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786673349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:45,135 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:45,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:27:45,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299678142] [2022-03-15 15:27:45,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:45,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:27:45,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:45,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:27:45,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:27:45,136 INFO L87 Difference]: Start difference. First operand 87 states and 182 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:46,226 INFO L93 Difference]: Finished difference Result 249 states and 465 transitions. [2022-03-15 15:27:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 15:27:46,226 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:46,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:46,227 INFO L225 Difference]: With dead ends: 249 [2022-03-15 15:27:46,227 INFO L226 Difference]: Without dead ends: 235 [2022-03-15 15:27:46,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=550, Invalid=2420, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 15:27:46,229 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 219 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:46,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 135 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:46,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-15 15:27:46,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 93. [2022-03-15 15:27:46,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1739130434782608) internal successors, (200), 92 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 200 transitions. [2022-03-15 15:27:46,231 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 200 transitions. Word has length 17 [2022-03-15 15:27:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:46,231 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 200 transitions. [2022-03-15 15:27:46,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:46,232 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 200 transitions. [2022-03-15 15:27:46,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:46,232 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:46,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:46,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:46,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:46,448 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:46,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:46,449 INFO L85 PathProgramCache]: Analyzing trace with hash 2011143702, now seen corresponding path program 26 times [2022-03-15 15:27:46,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:46,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716606141] [2022-03-15 15:27:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:46,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:46,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:46,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716606141] [2022-03-15 15:27:46,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716606141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:46,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245493694] [2022-03-15 15:27:46,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:46,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:46,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:46,544 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:46,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 15:27:46,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:46,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:46,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:27:46,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:46,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:47,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245493694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:47,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:47,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:27:47,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371486912] [2022-03-15 15:27:47,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:47,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:27:47,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:47,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:27:47,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:27:47,049 INFO L87 Difference]: Start difference. First operand 93 states and 200 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:48,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:48,458 INFO L93 Difference]: Finished difference Result 230 states and 441 transitions. [2022-03-15 15:27:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 15:27:48,459 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:48,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:48,460 INFO L225 Difference]: With dead ends: 230 [2022-03-15 15:27:48,460 INFO L226 Difference]: Without dead ends: 216 [2022-03-15 15:27:48,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=488, Invalid=2164, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:27:48,461 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 153 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:48,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 140 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:48,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-03-15 15:27:48,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 91. [2022-03-15 15:27:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1333333333333333) internal successors, (192), 90 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 192 transitions. [2022-03-15 15:27:48,463 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 192 transitions. Word has length 17 [2022-03-15 15:27:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:48,463 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 192 transitions. [2022-03-15 15:27:48,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:48,463 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 192 transitions. [2022-03-15 15:27:48,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:48,464 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:48,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:48,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:48,671 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,SelfDestructingSolverStorable30 [2022-03-15 15:27:48,671 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:48,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1712368788, now seen corresponding path program 27 times [2022-03-15 15:27:48,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:48,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470069256] [2022-03-15 15:27:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:48,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:48,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:48,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470069256] [2022-03-15 15:27:48,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470069256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:48,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649974049] [2022-03-15 15:27:48,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:27:48,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:48,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:48,763 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:48,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 15:27:48,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:27:48,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:48,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:27:48,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:49,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:49,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649974049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:49,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:49,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:27:49,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371078918] [2022-03-15 15:27:49,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:49,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:27:49,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:49,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:27:49,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:27:49,219 INFO L87 Difference]: Start difference. First operand 91 states and 192 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:50,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:50,230 INFO L93 Difference]: Finished difference Result 176 states and 340 transitions. [2022-03-15 15:27:50,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:27:50,231 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:50,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:50,231 INFO L225 Difference]: With dead ends: 176 [2022-03-15 15:27:50,231 INFO L226 Difference]: Without dead ends: 162 [2022-03-15 15:27:50,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=330, Invalid=1562, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:27:50,232 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 101 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:50,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 136 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:50,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-15 15:27:50,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 90. [2022-03-15 15:27:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1235955056179776) internal successors, (189), 89 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 189 transitions. [2022-03-15 15:27:50,236 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 189 transitions. Word has length 17 [2022-03-15 15:27:50,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:50,236 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 189 transitions. [2022-03-15 15:27:50,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:50,236 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 189 transitions. [2022-03-15 15:27:50,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:50,236 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:50,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:50,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:50,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:50,453 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:50,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1197250078, now seen corresponding path program 28 times [2022-03-15 15:27:50,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:50,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031066384] [2022-03-15 15:27:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:50,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:50,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:50,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031066384] [2022-03-15 15:27:50,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031066384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:50,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743747824] [2022-03-15 15:27:50,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:27:50,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:50,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:50,560 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:50,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 15:27:50,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:27:50,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:50,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:27:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:50,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:51,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743747824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:51,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:51,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-03-15 15:27:51,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142254436] [2022-03-15 15:27:51,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:51,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:27:51,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:51,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:27:51,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:27:51,038 INFO L87 Difference]: Start difference. First operand 90 states and 189 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:51,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:51,775 INFO L93 Difference]: Finished difference Result 189 states and 358 transitions. [2022-03-15 15:27:51,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:27:51,776 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:51,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:51,776 INFO L225 Difference]: With dead ends: 189 [2022-03-15 15:27:51,776 INFO L226 Difference]: Without dead ends: 146 [2022-03-15 15:27:51,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 15:27:51,777 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 146 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:51,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 143 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-15 15:27:51,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 96. [2022-03-15 15:27:51,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:51,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2022-03-15 15:27:51,780 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 17 [2022-03-15 15:27:51,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:51,780 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2022-03-15 15:27:51,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2022-03-15 15:27:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:51,780 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:51,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:51,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:51,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:51,991 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:51,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:51,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1343983402, now seen corresponding path program 29 times [2022-03-15 15:27:51,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:51,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700138230] [2022-03-15 15:27:51,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:51,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:52,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:52,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700138230] [2022-03-15 15:27:52,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700138230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:52,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869405451] [2022-03-15 15:27:52,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:27:52,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:52,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:52,067 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:52,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 15:27:52,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:27:52,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:52,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:27:52,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:52,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:52,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869405451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:52,432 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:52,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:27:52,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936910159] [2022-03-15 15:27:52,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:52,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:27:52,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:52,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:27:52,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:27:52,433 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:53,147 INFO L93 Difference]: Finished difference Result 177 states and 344 transitions. [2022-03-15 15:27:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 15:27:53,147 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:53,147 INFO L225 Difference]: With dead ends: 177 [2022-03-15 15:27:53,148 INFO L226 Difference]: Without dead ends: 163 [2022-03-15 15:27:53,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=1461, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 15:27:53,148 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:53,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 113 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:53,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-15 15:27:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 100. [2022-03-15 15:27:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.1414141414141414) internal successors, (212), 99 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:53,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 212 transitions. [2022-03-15 15:27:53,151 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 212 transitions. Word has length 17 [2022-03-15 15:27:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:53,151 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 212 transitions. [2022-03-15 15:27:53,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:53,151 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 212 transitions. [2022-03-15 15:27:53,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:53,151 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:53,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:53,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:53,353 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,SelfDestructingSolverStorable33 [2022-03-15 15:27:53,353 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:53,353 INFO L85 PathProgramCache]: Analyzing trace with hash 735310426, now seen corresponding path program 30 times [2022-03-15 15:27:53,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:53,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273559562] [2022-03-15 15:27:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:53,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:53,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:53,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273559562] [2022-03-15 15:27:53,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273559562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:53,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169421140] [2022-03-15 15:27:53,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:27:53,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:53,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:53,453 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:53,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 15:27:53,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:27:53,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:53,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:27:53,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:53,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:53,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169421140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:53,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:53,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:27:53,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489182257] [2022-03-15 15:27:53,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:53,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:27:53,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:53,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:27:53,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:27:53,805 INFO L87 Difference]: Start difference. First operand 100 states and 212 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:54,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:54,706 INFO L93 Difference]: Finished difference Result 242 states and 465 transitions. [2022-03-15 15:27:54,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 15:27:54,707 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:54,707 INFO L225 Difference]: With dead ends: 242 [2022-03-15 15:27:54,707 INFO L226 Difference]: Without dead ends: 228 [2022-03-15 15:27:54,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=642, Invalid=2550, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 15:27:54,709 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 162 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:54,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 163 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:54,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-03-15 15:27:54,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 102. [2022-03-15 15:27:54,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1782178217821784) internal successors, (220), 101 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 220 transitions. [2022-03-15 15:27:54,712 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 220 transitions. Word has length 17 [2022-03-15 15:27:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:54,712 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 220 transitions. [2022-03-15 15:27:54,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:54,713 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 220 transitions. [2022-03-15 15:27:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:54,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:54,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:54,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:54,929 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,SelfDestructingSolverStorable34 [2022-03-15 15:27:54,930 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:54,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:54,930 INFO L85 PathProgramCache]: Analyzing trace with hash 750771222, now seen corresponding path program 31 times [2022-03-15 15:27:54,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:54,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351916099] [2022-03-15 15:27:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:54,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:55,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:55,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351916099] [2022-03-15 15:27:55,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351916099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:55,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626945383] [2022-03-15 15:27:55,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:27:55,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:55,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:55,048 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:55,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 15:27:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:55,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:27:55,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:55,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:55,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626945383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:55,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:55,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:27:55,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278919648] [2022-03-15 15:27:55,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:55,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:27:55,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:55,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:27:55,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:27:55,405 INFO L87 Difference]: Start difference. First operand 102 states and 220 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:56,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:56,129 INFO L93 Difference]: Finished difference Result 229 states and 453 transitions. [2022-03-15 15:27:56,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:27:56,129 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:56,130 INFO L225 Difference]: With dead ends: 229 [2022-03-15 15:27:56,130 INFO L226 Difference]: Without dead ends: 215 [2022-03-15 15:27:56,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1748, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 15:27:56,130 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 107 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:56,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 191 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:27:56,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-15 15:27:56,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 104. [2022-03-15 15:27:56,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2022-03-15 15:27:56,133 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 17 [2022-03-15 15:27:56,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:56,133 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2022-03-15 15:27:56,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2022-03-15 15:27:56,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:56,133 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:56,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:56,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:56,343 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,SelfDestructingSolverStorable35 [2022-03-15 15:27:56,343 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:56,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:56,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1413486110, now seen corresponding path program 32 times [2022-03-15 15:27:56,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:56,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352644377] [2022-03-15 15:27:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:56,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:56,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:56,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:56,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352644377] [2022-03-15 15:27:56,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352644377] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:56,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999817456] [2022-03-15 15:27:56,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:27:56,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:56,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:56,424 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:56,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 15:27:56,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:27:56,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:56,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:27:56,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:56,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:56,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999817456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:56,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:56,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:27:56,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352883995] [2022-03-15 15:27:56,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:56,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:27:56,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:56,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:27:56,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:27:56,748 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:57,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:57,618 INFO L93 Difference]: Finished difference Result 269 states and 509 transitions. [2022-03-15 15:27:57,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 15:27:57,619 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:57,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:57,620 INFO L225 Difference]: With dead ends: 269 [2022-03-15 15:27:57,620 INFO L226 Difference]: Without dead ends: 255 [2022-03-15 15:27:57,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 15:27:57,623 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 189 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:57,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 194 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-15 15:27:57,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 107. [2022-03-15 15:27:57,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.19811320754717) internal successors, (233), 106 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 233 transitions. [2022-03-15 15:27:57,641 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 233 transitions. Word has length 17 [2022-03-15 15:27:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:57,641 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 233 transitions. [2022-03-15 15:27:57,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 233 transitions. [2022-03-15 15:27:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:57,642 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:57,642 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:57,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 15:27:57,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:57,842 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:57,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:57,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1398025314, now seen corresponding path program 33 times [2022-03-15 15:27:57,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:57,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431828159] [2022-03-15 15:27:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:57,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:57,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:57,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431828159] [2022-03-15 15:27:57,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431828159] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:57,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882007983] [2022-03-15 15:27:57,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:27:57,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:57,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:57,909 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:57,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 15:27:57,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:27:57,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:57,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:27:57,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:27:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:58,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:27:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:58,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882007983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:27:58,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:27:58,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:27:58,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068149413] [2022-03-15 15:27:58,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:27:58,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:27:58,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:27:58,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:27:58,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:27:58,415 INFO L87 Difference]: Start difference. First operand 107 states and 233 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:59,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:27:59,450 INFO L93 Difference]: Finished difference Result 262 states and 506 transitions. [2022-03-15 15:27:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 15:27:59,451 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:27:59,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:27:59,451 INFO L225 Difference]: With dead ends: 262 [2022-03-15 15:27:59,452 INFO L226 Difference]: Without dead ends: 248 [2022-03-15 15:27:59,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=2156, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:27:59,452 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 142 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:27:59,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 202 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:27:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-15 15:27:59,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 105. [2022-03-15 15:27:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.1634615384615383) internal successors, (225), 104 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:59,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 225 transitions. [2022-03-15 15:27:59,455 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 225 transitions. Word has length 17 [2022-03-15 15:27:59,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:27:59,455 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 225 transitions. [2022-03-15 15:27:59,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:27:59,455 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 225 transitions. [2022-03-15 15:27:59,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:27:59,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:27:59,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:27:59,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-15 15:27:59,663 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,SelfDestructingSolverStorable37 [2022-03-15 15:27:59,663 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:27:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:27:59,664 INFO L85 PathProgramCache]: Analyzing trace with hash -826570508, now seen corresponding path program 34 times [2022-03-15 15:27:59,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:27:59,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844144594] [2022-03-15 15:27:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:27:59,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:27:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:27:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:27:59,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:27:59,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844144594] [2022-03-15 15:27:59,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844144594] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:27:59,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569854128] [2022-03-15 15:27:59,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:27:59,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:27:59,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:27:59,760 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:27:59,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 15:27:59,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:27:59,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:27:59,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:27:59,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:00,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:00,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569854128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:00,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:00,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:00,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683842372] [2022-03-15 15:28:00,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:00,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:00,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:00,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:00,244 INFO L87 Difference]: Start difference. First operand 105 states and 225 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:00,806 INFO L93 Difference]: Finished difference Result 190 states and 372 transitions. [2022-03-15 15:28:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:28:00,806 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:00,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:00,807 INFO L225 Difference]: With dead ends: 190 [2022-03-15 15:28:00,807 INFO L226 Difference]: Without dead ends: 176 [2022-03-15 15:28:00,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 15:28:00,807 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:00,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 107 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-15 15:28:00,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 102. [2022-03-15 15:28:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1485148514851486) internal successors, (217), 101 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 217 transitions. [2022-03-15 15:28:00,809 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 217 transitions. Word has length 17 [2022-03-15 15:28:00,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:00,809 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 217 transitions. [2022-03-15 15:28:00,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:00,809 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 217 transitions. [2022-03-15 15:28:00,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:00,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:00,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:00,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-15 15:28:01,016 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,SelfDestructingSolverStorable38 [2022-03-15 15:28:01,016 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:01,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:01,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1787389598, now seen corresponding path program 35 times [2022-03-15 15:28:01,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:01,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102610100] [2022-03-15 15:28:01,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:01,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:01,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:01,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102610100] [2022-03-15 15:28:01,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102610100] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:01,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124823572] [2022-03-15 15:28:01,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:28:01,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:01,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:01,121 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:01,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 15:28:01,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:28:01,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:01,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:01,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:01,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:01,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124823572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:01,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:01,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:01,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127272219] [2022-03-15 15:28:01,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:01,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:01,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:01,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:01,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:01,600 INFO L87 Difference]: Start difference. First operand 102 states and 217 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:03,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:03,213 INFO L93 Difference]: Finished difference Result 307 states and 572 transitions. [2022-03-15 15:28:03,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 15:28:03,213 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:03,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:03,214 INFO L225 Difference]: With dead ends: 307 [2022-03-15 15:28:03,214 INFO L226 Difference]: Without dead ends: 293 [2022-03-15 15:28:03,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=697, Invalid=3463, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 15:28:03,215 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 202 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:03,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 224 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 15:28:03,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-15 15:28:03,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 107. [2022-03-15 15:28:03,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.2169811320754715) internal successors, (235), 106 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 235 transitions. [2022-03-15 15:28:03,218 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 235 transitions. Word has length 17 [2022-03-15 15:28:03,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:03,218 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 235 transitions. [2022-03-15 15:28:03,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:03,218 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 235 transitions. [2022-03-15 15:28:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:03,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:03,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:03,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-15 15:28:03,427 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,SelfDestructingSolverStorable39 [2022-03-15 15:28:03,427 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:03,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:03,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1802850394, now seen corresponding path program 36 times [2022-03-15 15:28:03,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:03,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767767559] [2022-03-15 15:28:03,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:03,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:03,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:03,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767767559] [2022-03-15 15:28:03,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767767559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:03,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42998726] [2022-03-15 15:28:03,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:28:03,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:03,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:03,518 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:03,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 15:28:03,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:28:03,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:03,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:03,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:03,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:03,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42998726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:03,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:03,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:03,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906148287] [2022-03-15 15:28:03,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:03,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:03,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:03,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:03,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:03,913 INFO L87 Difference]: Start difference. First operand 107 states and 235 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:05,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:05,343 INFO L93 Difference]: Finished difference Result 314 states and 592 transitions. [2022-03-15 15:28:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 15:28:05,343 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:05,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:05,344 INFO L225 Difference]: With dead ends: 314 [2022-03-15 15:28:05,344 INFO L226 Difference]: Without dead ends: 300 [2022-03-15 15:28:05,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=803, Invalid=3619, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 15:28:05,345 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 203 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:05,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 290 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:28:05,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-03-15 15:28:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 106. [2022-03-15 15:28:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.2) internal successors, (231), 105 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 231 transitions. [2022-03-15 15:28:05,349 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 231 transitions. Word has length 17 [2022-03-15 15:28:05,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:05,349 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 231 transitions. [2022-03-15 15:28:05,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:05,349 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 231 transitions. [2022-03-15 15:28:05,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:05,350 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:05,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:05,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:05,565 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,SelfDestructingSolverStorable40 [2022-03-15 15:28:05,565 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:05,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:05,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1920662096, now seen corresponding path program 37 times [2022-03-15 15:28:05,565 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:05,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282898819] [2022-03-15 15:28:05,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:05,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:05,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:05,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282898819] [2022-03-15 15:28:05,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282898819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:05,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260324923] [2022-03-15 15:28:05,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:28:05,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:05,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:05,645 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:05,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 15:28:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:05,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:05,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:05,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:06,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260324923] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:06,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:06,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:06,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700042239] [2022-03-15 15:28:06,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:06,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:06,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:06,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:06,227 INFO L87 Difference]: Start difference. First operand 106 states and 231 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:06,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:06,986 INFO L93 Difference]: Finished difference Result 235 states and 453 transitions. [2022-03-15 15:28:06,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 15:28:06,986 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:06,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:06,987 INFO L225 Difference]: With dead ends: 235 [2022-03-15 15:28:06,987 INFO L226 Difference]: Without dead ends: 221 [2022-03-15 15:28:06,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=424, Invalid=2026, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 15:28:06,987 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:06,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 214 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:06,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-15 15:28:07,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 105. [2022-03-15 15:28:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.1923076923076925) internal successors, (228), 104 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 228 transitions. [2022-03-15 15:28:07,013 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 228 transitions. Word has length 17 [2022-03-15 15:28:07,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:07,013 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 228 transitions. [2022-03-15 15:28:07,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:07,013 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 228 transitions. [2022-03-15 15:28:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:07,013 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:07,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:07,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:07,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:07,214 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:07,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:07,214 INFO L85 PathProgramCache]: Analyzing trace with hash -483246562, now seen corresponding path program 38 times [2022-03-15 15:28:07,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:07,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130703343] [2022-03-15 15:28:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:07,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:07,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:07,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130703343] [2022-03-15 15:28:07,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130703343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:07,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681260149] [2022-03-15 15:28:07,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:28:07,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:07,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:07,298 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:07,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 15:28:07,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:28:07,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:07,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:07,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:07,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:07,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681260149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:07,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:07,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-03-15 15:28:07,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513591522] [2022-03-15 15:28:07,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:07,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:28:07,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:07,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:28:07,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:28:07,693 INFO L87 Difference]: Start difference. First operand 105 states and 228 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:08,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:08,440 INFO L93 Difference]: Finished difference Result 241 states and 464 transitions. [2022-03-15 15:28:08,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 15:28:08,441 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:08,442 INFO L225 Difference]: With dead ends: 241 [2022-03-15 15:28:08,444 INFO L226 Difference]: Without dead ends: 206 [2022-03-15 15:28:08,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=527, Invalid=2125, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:28:08,449 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 151 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:08,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 170 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:08,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-15 15:28:08,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 109. [2022-03-15 15:28:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.2314814814814814) internal successors, (241), 108 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) [2022-03-15 15:28:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 241 transitions. [2022-03-15 15:28:08,469 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 241 transitions. Word has length 17 [2022-03-15 15:28:08,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:08,470 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 241 transitions. [2022-03-15 15:28:08,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 241 transitions. [2022-03-15 15:28:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:08,471 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:08,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:08,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:08,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:08,686 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:08,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:08,686 INFO L85 PathProgramCache]: Analyzing trace with hash -865966950, now seen corresponding path program 39 times [2022-03-15 15:28:08,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:08,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922959942] [2022-03-15 15:28:08,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:08,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:08,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:08,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922959942] [2022-03-15 15:28:08,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922959942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:08,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691138092] [2022-03-15 15:28:08,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:28:08,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:08,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:08,753 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:08,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 15:28:08,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:28:08,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:08,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:08,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:08,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:09,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691138092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:09,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:09,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-03-15 15:28:09,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674072066] [2022-03-15 15:28:09,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:09,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:28:09,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:09,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:28:09,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:28:09,077 INFO L87 Difference]: Start difference. First operand 109 states and 241 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:09,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:09,812 INFO L93 Difference]: Finished difference Result 223 states and 443 transitions. [2022-03-15 15:28:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 15:28:09,813 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:09,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:09,813 INFO L225 Difference]: With dead ends: 223 [2022-03-15 15:28:09,813 INFO L226 Difference]: Without dead ends: 209 [2022-03-15 15:28:09,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1817, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:28:09,814 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 132 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:09,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 197 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:09,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-15 15:28:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 110. [2022-03-15 15:28:09,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.238532110091743) internal successors, (244), 109 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 244 transitions. [2022-03-15 15:28:09,816 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 244 transitions. Word has length 17 [2022-03-15 15:28:09,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:09,816 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 244 transitions. [2022-03-15 15:28:09,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:09,817 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 244 transitions. [2022-03-15 15:28:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:09,817 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:09,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:09,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:10,032 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,SelfDestructingSolverStorable43 [2022-03-15 15:28:10,032 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:10,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:10,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1213326878, now seen corresponding path program 40 times [2022-03-15 15:28:10,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:10,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717160966] [2022-03-15 15:28:10,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:10,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:10,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:10,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717160966] [2022-03-15 15:28:10,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717160966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:10,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873780046] [2022-03-15 15:28:10,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:28:10,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:10,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:10,137 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:10,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 15:28:10,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:28:10,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:10,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:10,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:10,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:10,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873780046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:10,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:10,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-03-15 15:28:10,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122741965] [2022-03-15 15:28:10,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:10,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:28:10,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:10,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:28:10,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:28:10,538 INFO L87 Difference]: Start difference. First operand 110 states and 244 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:12,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:12,320 INFO L93 Difference]: Finished difference Result 304 states and 586 transitions. [2022-03-15 15:28:12,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 15:28:12,320 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:12,321 INFO L225 Difference]: With dead ends: 304 [2022-03-15 15:28:12,321 INFO L226 Difference]: Without dead ends: 290 [2022-03-15 15:28:12,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=817, Invalid=3089, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 15:28:12,322 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 206 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:12,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 248 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:28:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-15 15:28:12,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 112. [2022-03-15 15:28:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.27027027027027) internal successors, (252), 111 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:12,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 252 transitions. [2022-03-15 15:28:12,325 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 252 transitions. Word has length 17 [2022-03-15 15:28:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:12,325 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 252 transitions. [2022-03-15 15:28:12,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 252 transitions. [2022-03-15 15:28:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:12,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:12,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:12,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-15 15:28:12,542 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,SelfDestructingSolverStorable44 [2022-03-15 15:28:12,542 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:12,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:12,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1228787674, now seen corresponding path program 41 times [2022-03-15 15:28:12,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:12,542 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327381566] [2022-03-15 15:28:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:12,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:12,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:12,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327381566] [2022-03-15 15:28:12,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327381566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:12,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695709639] [2022-03-15 15:28:12,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:28:12,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:12,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:12,649 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:12,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 15:28:12,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:28:12,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:12,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:12,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:12,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:13,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695709639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:13,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:13,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-03-15 15:28:13,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072546491] [2022-03-15 15:28:13,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:13,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 15:28:13,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 15:28:13,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-03-15 15:28:13,110 INFO L87 Difference]: Start difference. First operand 112 states and 252 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:14,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:14,346 INFO L93 Difference]: Finished difference Result 266 states and 524 transitions. [2022-03-15 15:28:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 15:28:14,348 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:14,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:14,349 INFO L225 Difference]: With dead ends: 266 [2022-03-15 15:28:14,349 INFO L226 Difference]: Without dead ends: 252 [2022-03-15 15:28:14,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=714, Invalid=2708, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 15:28:14,350 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 232 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:14,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 151 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:14,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-15 15:28:14,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 110. [2022-03-15 15:28:14,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.2477064220183487) internal successors, (245), 109 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 245 transitions. [2022-03-15 15:28:14,352 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 245 transitions. Word has length 17 [2022-03-15 15:28:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:14,352 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 245 transitions. [2022-03-15 15:28:14,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 245 transitions. [2022-03-15 15:28:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:14,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:14,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:14,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:14,563 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,SelfDestructingSolverStorable45 [2022-03-15 15:28:14,563 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:14,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:14,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1836449622, now seen corresponding path program 42 times [2022-03-15 15:28:14,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:14,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378768173] [2022-03-15 15:28:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:14,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:14,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:14,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378768173] [2022-03-15 15:28:14,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378768173] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:14,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917173000] [2022-03-15 15:28:14,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:28:14,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:14,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:14,651 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:14,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 15:28:14,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:28:14,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:14,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:14,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:14,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:15,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:15,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917173000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:15,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:15,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:15,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576536064] [2022-03-15 15:28:15,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:15,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:15,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:15,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:15,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:15,056 INFO L87 Difference]: Start difference. First operand 110 states and 245 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:15,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:15,892 INFO L93 Difference]: Finished difference Result 248 states and 481 transitions. [2022-03-15 15:28:15,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 15:28:15,892 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:15,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:15,893 INFO L225 Difference]: With dead ends: 248 [2022-03-15 15:28:15,893 INFO L226 Difference]: Without dead ends: 227 [2022-03-15 15:28:15,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=420, Invalid=2130, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 15:28:15,894 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 146 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:15,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 196 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-15 15:28:15,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 116. [2022-03-15 15:28:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.217391304347826) internal successors, (255), 115 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 255 transitions. [2022-03-15 15:28:15,896 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 255 transitions. Word has length 17 [2022-03-15 15:28:15,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:15,896 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 255 transitions. [2022-03-15 15:28:15,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 255 transitions. [2022-03-15 15:28:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:15,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:15,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:15,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-15 15:28:16,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:16,112 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:16,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:16,113 INFO L85 PathProgramCache]: Analyzing trace with hash 913134938, now seen corresponding path program 43 times [2022-03-15 15:28:16,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:16,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844210072] [2022-03-15 15:28:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:16,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:16,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:16,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844210072] [2022-03-15 15:28:16,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844210072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:16,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794600902] [2022-03-15 15:28:16,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:28:16,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:16,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:16,232 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:16,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 15:28:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:16,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:16,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:16,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:16,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794600902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:16,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:16,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-03-15 15:28:16,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519524027] [2022-03-15 15:28:16,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:16,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:28:16,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:16,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:28:16,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:28:16,663 INFO L87 Difference]: Start difference. First operand 116 states and 255 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:17,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:17,892 INFO L93 Difference]: Finished difference Result 288 states and 577 transitions. [2022-03-15 15:28:17,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 15:28:17,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:17,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:17,893 INFO L225 Difference]: With dead ends: 288 [2022-03-15 15:28:17,893 INFO L226 Difference]: Without dead ends: 274 [2022-03-15 15:28:17,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=613, Invalid=2357, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 15:28:17,894 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 158 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:17,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 256 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:28:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-03-15 15:28:17,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 124. [2022-03-15 15:28:17,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.3008130081300813) internal successors, (283), 123 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 283 transitions. [2022-03-15 15:28:17,901 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 283 transitions. Word has length 17 [2022-03-15 15:28:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:17,901 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 283 transitions. [2022-03-15 15:28:17,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 283 transitions. [2022-03-15 15:28:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:17,901 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:17,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:17,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:18,115 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,SelfDestructingSolverStorable47 [2022-03-15 15:28:18,115 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:18,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:18,116 INFO L85 PathProgramCache]: Analyzing trace with hash 928595734, now seen corresponding path program 44 times [2022-03-15 15:28:18,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:18,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511642098] [2022-03-15 15:28:18,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:18,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:18,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:18,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511642098] [2022-03-15 15:28:18,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511642098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:18,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173778638] [2022-03-15 15:28:18,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:28:18,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:18,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:18,210 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:18,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 15:28:18,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:28:18,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:18,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:18,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:18,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:18,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:18,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173778638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:18,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:18,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-03-15 15:28:18,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419172001] [2022-03-15 15:28:18,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:18,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:28:18,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:18,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:28:18,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:28:18,656 INFO L87 Difference]: Start difference. First operand 124 states and 283 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) [2022-03-15 15:28:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:19,886 INFO L93 Difference]: Finished difference Result 319 states and 637 transitions. [2022-03-15 15:28:19,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 15:28:19,886 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 17 [2022-03-15 15:28:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:19,887 INFO L225 Difference]: With dead ends: 319 [2022-03-15 15:28:19,888 INFO L226 Difference]: Without dead ends: 305 [2022-03-15 15:28:19,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=747, Invalid=2913, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 15:28:19,888 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 208 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:19,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 198 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-03-15 15:28:19,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 123. [2022-03-15 15:28:19,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.2868852459016393) internal successors, (279), 122 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 279 transitions. [2022-03-15 15:28:19,904 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 279 transitions. Word has length 17 [2022-03-15 15:28:19,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:19,904 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 279 transitions. [2022-03-15 15:28:19,904 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) [2022-03-15 15:28:19,904 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 279 transitions. [2022-03-15 15:28:19,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:19,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:19,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:19,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-15 15:28:20,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 15:28:20,120 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:20,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1500050540, now seen corresponding path program 45 times [2022-03-15 15:28:20,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:20,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167309615] [2022-03-15 15:28:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:20,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:20,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:20,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167309615] [2022-03-15 15:28:20,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167309615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:20,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278201851] [2022-03-15 15:28:20,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:28:20,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:20,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:20,215 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:20,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 15:28:20,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:28:20,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:20,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:20,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:20,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:20,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278201851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:20,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:20,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-03-15 15:28:20,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641574360] [2022-03-15 15:28:20,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:20,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:28:20,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:20,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:28:20,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:28:20,646 INFO L87 Difference]: Start difference. First operand 123 states and 279 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) [2022-03-15 15:28:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:21,354 INFO L93 Difference]: Finished difference Result 287 states and 582 transitions. [2022-03-15 15:28:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 15:28:21,354 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 17 [2022-03-15 15:28:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:21,355 INFO L225 Difference]: With dead ends: 287 [2022-03-15 15:28:21,355 INFO L226 Difference]: Without dead ends: 273 [2022-03-15 15:28:21,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=474, Invalid=1976, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 15:28:21,357 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 150 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:21,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 241 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:21,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-15 15:28:21,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 122. [2022-03-15 15:28:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.28099173553719) internal successors, (276), 121 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 276 transitions. [2022-03-15 15:28:21,359 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 276 transitions. Word has length 17 [2022-03-15 15:28:21,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:21,359 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 276 transitions. [2022-03-15 15:28:21,359 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) [2022-03-15 15:28:21,359 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 276 transitions. [2022-03-15 15:28:21,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:21,360 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:21,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:21,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:21,575 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,SelfDestructingSolverStorable49 [2022-03-15 15:28:21,575 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:21,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1357501222, now seen corresponding path program 46 times [2022-03-15 15:28:21,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:21,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896612836] [2022-03-15 15:28:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:21,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:21,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:21,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896612836] [2022-03-15 15:28:21,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896612836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:21,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428104837] [2022-03-15 15:28:21,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:28:21,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:21,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:21,639 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:21,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 15:28:21,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:28:21,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:21,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:21,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:21,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:21,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:21,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428104837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:21,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:21,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-03-15 15:28:21,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112492849] [2022-03-15 15:28:21,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:21,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:28:21,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:21,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:28:21,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:28:21,983 INFO L87 Difference]: Start difference. First operand 122 states and 276 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:22,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:22,535 INFO L93 Difference]: Finished difference Result 241 states and 483 transitions. [2022-03-15 15:28:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:28:22,536 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:22,537 INFO L225 Difference]: With dead ends: 241 [2022-03-15 15:28:22,537 INFO L226 Difference]: Without dead ends: 227 [2022-03-15 15:28:22,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=368, Invalid=1888, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:28:22,538 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 110 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:22,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 188 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:22,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-15 15:28:22,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 123. [2022-03-15 15:28:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.3114754098360657) internal successors, (282), 122 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 282 transitions. [2022-03-15 15:28:22,541 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 282 transitions. Word has length 17 [2022-03-15 15:28:22,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:22,541 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 282 transitions. [2022-03-15 15:28:22,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:22,542 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 282 transitions. [2022-03-15 15:28:22,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:22,542 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:22,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:22,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:22,758 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,SelfDestructingSolverStorable50 [2022-03-15 15:28:22,759 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:22,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:22,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1740221610, now seen corresponding path program 47 times [2022-03-15 15:28:22,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:22,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657397792] [2022-03-15 15:28:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:22,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:22,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:22,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657397792] [2022-03-15 15:28:22,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657397792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:22,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321496336] [2022-03-15 15:28:22,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:28:22,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:22,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:22,853 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:22,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 15:28:22,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:28:22,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:22,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:22,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:23,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:23,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321496336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:23,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:23,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-03-15 15:28:23,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144479897] [2022-03-15 15:28:23,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:23,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:28:23,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:23,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:28:23,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:28:23,300 INFO L87 Difference]: Start difference. First operand 123 states and 282 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:23,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:23,785 INFO L93 Difference]: Finished difference Result 231 states and 469 transitions. [2022-03-15 15:28:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:28:23,785 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:23,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:23,786 INFO L225 Difference]: With dead ends: 231 [2022-03-15 15:28:23,786 INFO L226 Difference]: Without dead ends: 217 [2022-03-15 15:28:23,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=1628, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 15:28:23,787 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 105 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:23,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 214 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:23,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-15 15:28:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 122. [2022-03-15 15:28:23,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.330578512396694) internal successors, (282), 121 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 282 transitions. [2022-03-15 15:28:23,792 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 282 transitions. Word has length 17 [2022-03-15 15:28:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:23,792 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 282 transitions. [2022-03-15 15:28:23,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 282 transitions. [2022-03-15 15:28:23,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:23,792 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:23,792 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:23,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-15 15:28:24,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:24,007 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:24,008 INFO L85 PathProgramCache]: Analyzing trace with hash 339072218, now seen corresponding path program 48 times [2022-03-15 15:28:24,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:24,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809019840] [2022-03-15 15:28:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:24,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:24,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:24,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809019840] [2022-03-15 15:28:24,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809019840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:24,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711260473] [2022-03-15 15:28:24,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:28:24,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:24,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:24,084 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:24,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 15:28:24,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:28:24,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:24,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:24,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:24,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:24,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711260473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:24,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:24,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-03-15 15:28:24,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050496312] [2022-03-15 15:28:24,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:24,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:28:24,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:24,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:28:24,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:28:24,453 INFO L87 Difference]: Start difference. First operand 122 states and 282 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:25,365 INFO L93 Difference]: Finished difference Result 302 states and 600 transitions. [2022-03-15 15:28:25,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 15:28:25,365 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:25,366 INFO L225 Difference]: With dead ends: 302 [2022-03-15 15:28:25,366 INFO L226 Difference]: Without dead ends: 288 [2022-03-15 15:28:25,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=670, Invalid=2752, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 15:28:25,367 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 200 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:25,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 210 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-15 15:28:25,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 123. [2022-03-15 15:28:25,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.3442622950819674) internal successors, (286), 122 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 286 transitions. [2022-03-15 15:28:25,370 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 286 transitions. Word has length 17 [2022-03-15 15:28:25,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:25,370 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 286 transitions. [2022-03-15 15:28:25,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:25,370 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 286 transitions. [2022-03-15 15:28:25,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:25,370 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:25,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:25,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:25,585 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,SelfDestructingSolverStorable52 [2022-03-15 15:28:25,586 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:25,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:25,586 INFO L85 PathProgramCache]: Analyzing trace with hash 354533014, now seen corresponding path program 49 times [2022-03-15 15:28:25,586 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:25,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744616095] [2022-03-15 15:28:25,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:25,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:25,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:25,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744616095] [2022-03-15 15:28:25,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744616095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:25,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497400036] [2022-03-15 15:28:25,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:28:25,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:25,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:25,695 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:25,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 15:28:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:25,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:25,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:25,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:26,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497400036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:26,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:26,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-03-15 15:28:26,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512710031] [2022-03-15 15:28:26,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:26,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:28:26,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:26,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:28:26,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:28:26,188 INFO L87 Difference]: Start difference. First operand 123 states and 286 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) [2022-03-15 15:28:27,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:27,151 INFO L93 Difference]: Finished difference Result 277 states and 569 transitions. [2022-03-15 15:28:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 15:28:27,151 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 17 [2022-03-15 15:28:27,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:27,152 INFO L225 Difference]: With dead ends: 277 [2022-03-15 15:28:27,152 INFO L226 Difference]: Without dead ends: 263 [2022-03-15 15:28:27,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=554, Invalid=2308, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 15:28:27,153 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 150 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:27,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 204 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:27,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-15 15:28:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 122. [2022-03-15 15:28:27,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.330578512396694) internal successors, (282), 121 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 282 transitions. [2022-03-15 15:28:27,156 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 282 transitions. Word has length 17 [2022-03-15 15:28:27,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:27,156 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 282 transitions. [2022-03-15 15:28:27,156 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) [2022-03-15 15:28:27,156 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 282 transitions. [2022-03-15 15:28:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:27,156 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:27,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:27,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:27,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:27,372 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:27,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:27,372 INFO L85 PathProgramCache]: Analyzing trace with hash 962194962, now seen corresponding path program 50 times [2022-03-15 15:28:27,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:27,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919612145] [2022-03-15 15:28:27,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:27,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:27,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:27,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919612145] [2022-03-15 15:28:27,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919612145] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:27,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745188348] [2022-03-15 15:28:27,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:28:27,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:27,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:27,485 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:27,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 15:28:27,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:28:27,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:27,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:27,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:27,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:27,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745188348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:27,965 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:27,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-03-15 15:28:27,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776564710] [2022-03-15 15:28:27,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:27,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:28:27,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:27,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:28:27,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:28:27,966 INFO L87 Difference]: Start difference. First operand 122 states and 282 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) [2022-03-15 15:28:28,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:28,801 INFO L93 Difference]: Finished difference Result 288 states and 579 transitions. [2022-03-15 15:28:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 15:28:28,801 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 17 [2022-03-15 15:28:28,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:28,802 INFO L225 Difference]: With dead ends: 288 [2022-03-15 15:28:28,802 INFO L226 Difference]: Without dead ends: 274 [2022-03-15 15:28:28,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=524, Invalid=2232, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 15:28:28,803 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 156 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:28,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 185 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:28,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-03-15 15:28:28,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 127. [2022-03-15 15:28:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.2857142857142856) internal successors, (288), 126 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 288 transitions. [2022-03-15 15:28:28,819 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 288 transitions. Word has length 17 [2022-03-15 15:28:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:28,819 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 288 transitions. [2022-03-15 15:28:28,819 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) [2022-03-15 15:28:28,820 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 288 transitions. [2022-03-15 15:28:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:28,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:28,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:28,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:29,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:29,035 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:29,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1367225546, now seen corresponding path program 51 times [2022-03-15 15:28:29,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:29,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362591645] [2022-03-15 15:28:29,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:29,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:29,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:29,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362591645] [2022-03-15 15:28:29,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362591645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:29,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014746754] [2022-03-15 15:28:29,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:28:29,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:29,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:29,124 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:29,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 15:28:29,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:28:29,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:29,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:29,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:29,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:29,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014746754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:29,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:29,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-03-15 15:28:29,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358915865] [2022-03-15 15:28:29,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:29,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:28:29,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:29,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:28:29,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:28:29,522 INFO L87 Difference]: Start difference. First operand 127 states and 288 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) [2022-03-15 15:28:30,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:30,170 INFO L93 Difference]: Finished difference Result 243 states and 501 transitions. [2022-03-15 15:28:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 15:28:30,170 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 17 [2022-03-15 15:28:30,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:30,171 INFO L225 Difference]: With dead ends: 243 [2022-03-15 15:28:30,171 INFO L226 Difference]: Without dead ends: 229 [2022-03-15 15:28:30,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=418, Invalid=1562, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 15:28:30,172 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 149 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:30,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 131 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-15 15:28:30,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 125. [2022-03-15 15:28:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.2661290322580645) internal successors, (281), 124 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 281 transitions. [2022-03-15 15:28:30,174 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 281 transitions. Word has length 17 [2022-03-15 15:28:30,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:30,174 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 281 transitions. [2022-03-15 15:28:30,174 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) [2022-03-15 15:28:30,174 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 281 transitions. [2022-03-15 15:28:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:30,174 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:30,174 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:30,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:30,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:30,390 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:30,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:30,390 INFO L85 PathProgramCache]: Analyzing trace with hash -797031786, now seen corresponding path program 52 times [2022-03-15 15:28:30,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:30,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272848266] [2022-03-15 15:28:30,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:30,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:30,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:30,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272848266] [2022-03-15 15:28:30,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272848266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:30,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512843893] [2022-03-15 15:28:30,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:28:30,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:30,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:30,517 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:30,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 15:28:30,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:28:30,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:30,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:30,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:30,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:30,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512843893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:30,980 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:30,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-03-15 15:28:30,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204396286] [2022-03-15 15:28:30,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:30,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:28:30,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:30,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:28:30,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:28:30,981 INFO L87 Difference]: Start difference. First operand 125 states and 281 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:31,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:31,721 INFO L93 Difference]: Finished difference Result 245 states and 497 transitions. [2022-03-15 15:28:31,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:28:31,721 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:31,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:31,722 INFO L225 Difference]: With dead ends: 245 [2022-03-15 15:28:31,722 INFO L226 Difference]: Without dead ends: 231 [2022-03-15 15:28:31,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=342, Invalid=1380, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:28:31,722 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 165 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:31,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 147 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:31,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-15 15:28:31,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 123. [2022-03-15 15:28:31,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.262295081967213) internal successors, (276), 122 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:31,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 276 transitions. [2022-03-15 15:28:31,725 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 276 transitions. Word has length 17 [2022-03-15 15:28:31,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:31,725 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 276 transitions. [2022-03-15 15:28:31,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:31,725 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 276 transitions. [2022-03-15 15:28:31,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:31,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:31,725 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:31,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:31,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:31,935 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:31,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:31,936 INFO L85 PathProgramCache]: Analyzing trace with hash -781570990, now seen corresponding path program 53 times [2022-03-15 15:28:31,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:31,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863299480] [2022-03-15 15:28:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:31,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:32,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:32,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863299480] [2022-03-15 15:28:32,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863299480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:32,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550823775] [2022-03-15 15:28:32,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:28:32,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:32,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:32,044 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:32,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:28:32,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:32,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:32,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:32,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 15:28:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:32,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:32,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550823775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:32,554 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:32,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-03-15 15:28:32,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247075393] [2022-03-15 15:28:32,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:32,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:28:32,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:28:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:28:32,555 INFO L87 Difference]: Start difference. First operand 123 states and 276 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) [2022-03-15 15:28:33,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:33,447 INFO L93 Difference]: Finished difference Result 262 states and 528 transitions. [2022-03-15 15:28:33,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 15:28:33,447 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 17 [2022-03-15 15:28:33,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:33,448 INFO L225 Difference]: With dead ends: 262 [2022-03-15 15:28:33,448 INFO L226 Difference]: Without dead ends: 248 [2022-03-15 15:28:33,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=411, Invalid=1569, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 15:28:33,448 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 169 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:33,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 149 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-15 15:28:33,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 122. [2022-03-15 15:28:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.2479338842975207) internal successors, (272), 121 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 272 transitions. [2022-03-15 15:28:33,451 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 272 transitions. Word has length 17 [2022-03-15 15:28:33,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:33,451 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 272 transitions. [2022-03-15 15:28:33,451 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) [2022-03-15 15:28:33,451 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 272 transitions. [2022-03-15 15:28:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:33,451 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:33,451 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:33,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-15 15:28:33,653 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,SelfDestructingSolverStorable57 [2022-03-15 15:28:33,653 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:33,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:33,654 INFO L85 PathProgramCache]: Analyzing trace with hash -210116184, now seen corresponding path program 54 times [2022-03-15 15:28:33,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:33,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666040270] [2022-03-15 15:28:33,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:33,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:33,747 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:33,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666040270] [2022-03-15 15:28:33,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666040270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:33,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643190924] [2022-03-15 15:28:33,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:28:33,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:33,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:33,749 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:33,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 15:28:33,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:28:33,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:33,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:33,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:33,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:34,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643190924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:34,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:34,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-03-15 15:28:34,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327119014] [2022-03-15 15:28:34,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:34,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 15:28:34,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:34,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 15:28:34,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-03-15 15:28:34,100 INFO L87 Difference]: Start difference. First operand 122 states and 272 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) [2022-03-15 15:28:34,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:34,595 INFO L93 Difference]: Finished difference Result 196 states and 406 transitions. [2022-03-15 15:28:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:28:34,595 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 17 [2022-03-15 15:28:34,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:34,595 INFO L225 Difference]: With dead ends: 196 [2022-03-15 15:28:34,595 INFO L226 Difference]: Without dead ends: 182 [2022-03-15 15:28:34,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 15:28:34,596 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 114 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:34,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 119 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:28:34,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-15 15:28:34,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 122. [2022-03-15 15:28:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.2479338842975207) internal successors, (272), 121 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:34,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 272 transitions. [2022-03-15 15:28:34,599 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 272 transitions. Word has length 17 [2022-03-15 15:28:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:34,599 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 272 transitions. [2022-03-15 15:28:34,614 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) [2022-03-15 15:28:34,614 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 272 transitions. [2022-03-15 15:28:34,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:34,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:34,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:34,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:34,815 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,SelfDestructingSolverStorable58 [2022-03-15 15:28:34,815 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:34,815 INFO L85 PathProgramCache]: Analyzing trace with hash 336092702, now seen corresponding path program 55 times [2022-03-15 15:28:34,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:34,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368684649] [2022-03-15 15:28:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:34,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:34,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:34,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368684649] [2022-03-15 15:28:34,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368684649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:34,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355691361] [2022-03-15 15:28:34,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:28:34,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:34,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:34,879 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:34,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 15:28:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:34,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:34,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:35,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:35,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355691361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:35,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:35,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:35,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377768184] [2022-03-15 15:28:35,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:35,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:35,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:35,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:35,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:35,192 INFO L87 Difference]: Start difference. First operand 122 states and 272 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:35,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:35,937 INFO L93 Difference]: Finished difference Result 307 states and 589 transitions. [2022-03-15 15:28:35,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 15:28:35,937 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:35,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:35,938 INFO L225 Difference]: With dead ends: 307 [2022-03-15 15:28:35,938 INFO L226 Difference]: Without dead ends: 286 [2022-03-15 15:28:35,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=422, Invalid=2230, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:28:35,939 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 194 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:35,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 176 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:35,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-03-15 15:28:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 132. [2022-03-15 15:28:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.282442748091603) internal successors, (299), 131 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:35,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 299 transitions. [2022-03-15 15:28:35,960 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 299 transitions. Word has length 17 [2022-03-15 15:28:35,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:35,960 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 299 transitions. [2022-03-15 15:28:35,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 299 transitions. [2022-03-15 15:28:35,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:35,961 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:35,961 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:35,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:36,176 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,SelfDestructingSolverStorable59 [2022-03-15 15:28:36,177 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:36,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:36,177 INFO L85 PathProgramCache]: Analyzing trace with hash -46627686, now seen corresponding path program 56 times [2022-03-15 15:28:36,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:36,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178106833] [2022-03-15 15:28:36,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:36,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:36,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:36,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178106833] [2022-03-15 15:28:36,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178106833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:36,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227734996] [2022-03-15 15:28:36,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:28:36,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:36,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:36,301 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:36,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 15:28:36,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:28:36,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:36,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:36,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:36,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:36,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227734996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:36,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:36,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:36,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477418202] [2022-03-15 15:28:36,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:36,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:36,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:36,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:36,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:36,816 INFO L87 Difference]: Start difference. First operand 132 states and 299 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:37,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:37,502 INFO L93 Difference]: Finished difference Result 270 states and 534 transitions. [2022-03-15 15:28:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 15:28:37,502 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:37,503 INFO L225 Difference]: With dead ends: 270 [2022-03-15 15:28:37,503 INFO L226 Difference]: Without dead ends: 256 [2022-03-15 15:28:37,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=401, Invalid=1951, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 15:28:37,503 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 152 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:37,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 201 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:37,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-03-15 15:28:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 131. [2022-03-15 15:28:37,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.3) internal successors, (299), 130 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:37,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 299 transitions. [2022-03-15 15:28:37,515 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 299 transitions. Word has length 17 [2022-03-15 15:28:37,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:37,515 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 299 transitions. [2022-03-15 15:28:37,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:37,516 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 299 transitions. [2022-03-15 15:28:37,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:37,516 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:37,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:37,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:37,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:37,731 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:37,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:37,732 INFO L85 PathProgramCache]: Analyzing trace with hash 2032666142, now seen corresponding path program 57 times [2022-03-15 15:28:37,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:37,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683198968] [2022-03-15 15:28:37,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:37,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:37,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:37,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683198968] [2022-03-15 15:28:37,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683198968] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:37,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565250786] [2022-03-15 15:28:37,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:28:37,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:37,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:37,830 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:37,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:28:37,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:37,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:37,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:37,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 15:28:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:38,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:38,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565250786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:38,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:38,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:38,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400131313] [2022-03-15 15:28:38,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:38,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:38,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:38,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:38,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:38,245 INFO L87 Difference]: Start difference. First operand 131 states and 299 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:39,349 INFO L93 Difference]: Finished difference Result 345 states and 681 transitions. [2022-03-15 15:28:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 15:28:39,350 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:39,351 INFO L225 Difference]: With dead ends: 345 [2022-03-15 15:28:39,351 INFO L226 Difference]: Without dead ends: 331 [2022-03-15 15:28:39,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=797, Invalid=3493, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 15:28:39,351 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:39,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 201 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-15 15:28:39,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 133. [2022-03-15 15:28:39,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.3257575757575757) internal successors, (307), 132 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 307 transitions. [2022-03-15 15:28:39,370 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 307 transitions. Word has length 17 [2022-03-15 15:28:39,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:39,370 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 307 transitions. [2022-03-15 15:28:39,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:39,370 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 307 transitions. [2022-03-15 15:28:39,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:39,370 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:39,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:39,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:39,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:39,598 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:39,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:39,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2048126938, now seen corresponding path program 58 times [2022-03-15 15:28:39,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:39,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220042969] [2022-03-15 15:28:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:39,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:39,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:39,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220042969] [2022-03-15 15:28:39,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220042969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:39,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81875216] [2022-03-15 15:28:39,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:28:39,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:39,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:39,706 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:39,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 15:28:39,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:28:39,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:39,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:39,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:39,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:40,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81875216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:40,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:40,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:40,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402853664] [2022-03-15 15:28:40,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:40,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:40,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:40,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:40,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:40,175 INFO L87 Difference]: Start difference. First operand 133 states and 307 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:41,395 INFO L93 Difference]: Finished difference Result 325 states and 658 transitions. [2022-03-15 15:28:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 15:28:41,395 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:41,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:41,396 INFO L225 Difference]: With dead ends: 325 [2022-03-15 15:28:41,396 INFO L226 Difference]: Without dead ends: 311 [2022-03-15 15:28:41,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=649, Invalid=3011, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 15:28:41,397 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 190 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:41,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 216 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-03-15 15:28:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 130. [2022-03-15 15:28:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.294573643410853) internal successors, (296), 129 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:41,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 296 transitions. [2022-03-15 15:28:41,400 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 296 transitions. Word has length 17 [2022-03-15 15:28:41,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:41,400 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 296 transitions. [2022-03-15 15:28:41,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:41,401 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 296 transitions. [2022-03-15 15:28:41,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:41,401 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:41,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:41,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:41,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:41,616 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:41,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:41,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1234147826, now seen corresponding path program 59 times [2022-03-15 15:28:41,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:41,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719505126] [2022-03-15 15:28:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:41,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:41,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:41,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719505126] [2022-03-15 15:28:41,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719505126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:41,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039920521] [2022-03-15 15:28:41,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:28:41,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:41,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:41,698 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:41,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 15:28:41,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:28:41,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:41,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:41,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:41,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:42,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039920521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:42,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:42,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:42,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113677969] [2022-03-15 15:28:42,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:42,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:42,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:42,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:42,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:42,095 INFO L87 Difference]: Start difference. First operand 130 states and 296 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:43,150 INFO L93 Difference]: Finished difference Result 301 states and 607 transitions. [2022-03-15 15:28:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 15:28:43,150 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:43,151 INFO L225 Difference]: With dead ends: 301 [2022-03-15 15:28:43,151 INFO L226 Difference]: Without dead ends: 287 [2022-03-15 15:28:43,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=518, Invalid=2134, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:28:43,152 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 158 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:43,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 173 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-15 15:28:43,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 131. [2022-03-15 15:28:43,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.292307692307692) internal successors, (298), 130 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:43,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 298 transitions. [2022-03-15 15:28:43,155 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 298 transitions. Word has length 17 [2022-03-15 15:28:43,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:43,155 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 298 transitions. [2022-03-15 15:28:43,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:43,155 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 298 transitions. [2022-03-15 15:28:43,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:43,155 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:43,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:43,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:43,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-03-15 15:28:43,356 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:43,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:43,356 INFO L85 PathProgramCache]: Analyzing trace with hash 896562138, now seen corresponding path program 60 times [2022-03-15 15:28:43,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:43,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670812178] [2022-03-15 15:28:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:43,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:43,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:43,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670812178] [2022-03-15 15:28:43,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670812178] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:43,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559361001] [2022-03-15 15:28:43,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:28:43,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:43,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:43,456 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:43,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 15:28:43,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:28:43,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:43,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:43,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:43,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:43,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559361001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:43,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:43,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:43,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285728886] [2022-03-15 15:28:43,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:43,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:43,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:43,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:43,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:43,874 INFO L87 Difference]: Start difference. First operand 131 states and 298 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:44,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:44,706 INFO L93 Difference]: Finished difference Result 310 states and 624 transitions. [2022-03-15 15:28:44,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:28:44,706 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:44,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:44,707 INFO L225 Difference]: With dead ends: 310 [2022-03-15 15:28:44,707 INFO L226 Difference]: Without dead ends: 296 [2022-03-15 15:28:44,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=414, Invalid=1748, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 15:28:44,708 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 159 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:44,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 173 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:44,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-15 15:28:44,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 138. [2022-03-15 15:28:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.3138686131386863) internal successors, (317), 137 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 317 transitions. [2022-03-15 15:28:44,713 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 317 transitions. Word has length 17 [2022-03-15 15:28:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:44,714 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 317 transitions. [2022-03-15 15:28:44,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 317 transitions. [2022-03-15 15:28:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:44,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:44,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:44,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:44,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:44,930 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:44,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:44,930 INFO L85 PathProgramCache]: Analyzing trace with hash 912022934, now seen corresponding path program 61 times [2022-03-15 15:28:44,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:44,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740518859] [2022-03-15 15:28:44,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:44,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:45,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:45,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740518859] [2022-03-15 15:28:45,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740518859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:45,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264721605] [2022-03-15 15:28:45,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:28:45,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:45,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:45,024 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:45,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 15:28:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:45,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:45,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:45,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:45,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264721605] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:45,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:45,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:45,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735145290] [2022-03-15 15:28:45,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:45,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:45,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:45,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:45,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:45,530 INFO L87 Difference]: Start difference. First operand 138 states and 317 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:46,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:46,657 INFO L93 Difference]: Finished difference Result 339 states and 682 transitions. [2022-03-15 15:28:46,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 15:28:46,657 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:46,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:46,658 INFO L225 Difference]: With dead ends: 339 [2022-03-15 15:28:46,658 INFO L226 Difference]: Without dead ends: 325 [2022-03-15 15:28:46,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=566, Invalid=2296, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 15:28:46,659 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 167 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:46,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 172 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:46,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-03-15 15:28:46,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 143. [2022-03-15 15:28:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.323943661971831) internal successors, (330), 142 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:46,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 330 transitions. [2022-03-15 15:28:46,661 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 330 transitions. Word has length 17 [2022-03-15 15:28:46,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:46,662 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 330 transitions. [2022-03-15 15:28:46,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:46,662 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 330 transitions. [2022-03-15 15:28:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:46,662 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:46,662 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:46,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-15 15:28:46,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-15 15:28:46,871 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:46,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:46,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1483477740, now seen corresponding path program 62 times [2022-03-15 15:28:46,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:46,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538257405] [2022-03-15 15:28:46,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:46,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:46,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:46,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538257405] [2022-03-15 15:28:46,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538257405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:46,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412323218] [2022-03-15 15:28:46,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:28:46,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:46,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:46,979 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:46,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 15:28:46,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:28:46,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:46,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:46,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:47,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:47,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412323218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:47,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:47,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:47,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054887030] [2022-03-15 15:28:47,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:47,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:47,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:47,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:47,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:47,472 INFO L87 Difference]: Start difference. First operand 143 states and 330 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:48,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:48,231 INFO L93 Difference]: Finished difference Result 263 states and 539 transitions. [2022-03-15 15:28:48,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:28:48,232 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:48,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:48,233 INFO L225 Difference]: With dead ends: 263 [2022-03-15 15:28:48,233 INFO L226 Difference]: Without dead ends: 249 [2022-03-15 15:28:48,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=368, Invalid=1524, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 15:28:48,233 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 121 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:48,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 115 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:48,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-15 15:28:48,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 141. [2022-03-15 15:28:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.3214285714285716) internal successors, (325), 140 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 325 transitions. [2022-03-15 15:28:48,235 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 325 transitions. Word has length 17 [2022-03-15 15:28:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:48,235 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 325 transitions. [2022-03-15 15:28:48,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 325 transitions. [2022-03-15 15:28:48,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:48,236 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:48,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:48,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:48,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-15 15:28:48,447 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash -348349546, now seen corresponding path program 63 times [2022-03-15 15:28:48,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:48,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837038892] [2022-03-15 15:28:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:48,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:48,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:48,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837038892] [2022-03-15 15:28:48,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837038892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:48,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390191554] [2022-03-15 15:28:48,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:28:48,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:48,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:48,522 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:48,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 15:28:48,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:28:48,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:48,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:48,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:48,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:48,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390191554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:48,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:48,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:48,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066250266] [2022-03-15 15:28:48,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:48,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:48,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:48,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:48,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:48,882 INFO L87 Difference]: Start difference. First operand 141 states and 325 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:49,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:49,831 INFO L93 Difference]: Finished difference Result 286 states and 577 transitions. [2022-03-15 15:28:49,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 15:28:49,832 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:49,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:49,832 INFO L225 Difference]: With dead ends: 286 [2022-03-15 15:28:49,832 INFO L226 Difference]: Without dead ends: 272 [2022-03-15 15:28:49,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=502, Invalid=2254, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 15:28:49,833 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 137 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:49,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 155 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:49,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-15 15:28:49,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 143. [2022-03-15 15:28:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.323943661971831) internal successors, (330), 142 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 330 transitions. [2022-03-15 15:28:49,835 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 330 transitions. Word has length 17 [2022-03-15 15:28:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:49,835 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 330 transitions. [2022-03-15 15:28:49,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 330 transitions. [2022-03-15 15:28:49,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:49,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:49,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:49,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:50,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-15 15:28:50,052 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:50,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:50,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1797821214, now seen corresponding path program 64 times [2022-03-15 15:28:50,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:50,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904624760] [2022-03-15 15:28:50,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:50,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:50,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:50,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904624760] [2022-03-15 15:28:50,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904624760] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:50,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47739985] [2022-03-15 15:28:50,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:28:50,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:50,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:50,146 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:50,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 15:28:50,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:28:50,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:50,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:50,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:50,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:50,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47739985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:50,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:50,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:50,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271103382] [2022-03-15 15:28:50,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:50,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:50,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:50,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:50,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:50,540 INFO L87 Difference]: Start difference. First operand 143 states and 330 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:51,991 INFO L93 Difference]: Finished difference Result 325 states and 646 transitions. [2022-03-15 15:28:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 15:28:51,991 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:51,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:51,992 INFO L225 Difference]: With dead ends: 325 [2022-03-15 15:28:51,992 INFO L226 Difference]: Without dead ends: 311 [2022-03-15 15:28:51,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=598, Invalid=2708, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 15:28:51,992 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 174 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:51,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 185 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 15:28:51,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-03-15 15:28:51,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 144. [2022-03-15 15:28:51,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.3146853146853146) internal successors, (331), 143 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:51,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 331 transitions. [2022-03-15 15:28:51,995 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 331 transitions. Word has length 17 [2022-03-15 15:28:51,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:51,995 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 331 transitions. [2022-03-15 15:28:51,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:51,995 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 331 transitions. [2022-03-15 15:28:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:51,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:51,996 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:52,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:52,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 15:28:52,203 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:52,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1925691276, now seen corresponding path program 65 times [2022-03-15 15:28:52,204 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:52,204 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090333139] [2022-03-15 15:28:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:52,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:52,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:52,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090333139] [2022-03-15 15:28:52,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090333139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:52,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191204710] [2022-03-15 15:28:52,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:28:52,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:52,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:52,268 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:52,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 15:28:52,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 15:28:52,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:52,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:52,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:52,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:52,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191204710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:52,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:52,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:52,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793654894] [2022-03-15 15:28:52,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:52,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:52,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:52,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:52,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:52,588 INFO L87 Difference]: Start difference. First operand 144 states and 331 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:53,294 INFO L93 Difference]: Finished difference Result 250 states and 512 transitions. [2022-03-15 15:28:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 15:28:53,295 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:53,295 INFO L225 Difference]: With dead ends: 250 [2022-03-15 15:28:53,296 INFO L226 Difference]: Without dead ends: 236 [2022-03-15 15:28:53,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:28:53,296 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:53,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 140 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:53,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-15 15:28:53,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 144. [2022-03-15 15:28:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.3146853146853146) internal successors, (331), 143 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:53,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 331 transitions. [2022-03-15 15:28:53,298 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 331 transitions. Word has length 17 [2022-03-15 15:28:53,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:53,298 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 331 transitions. [2022-03-15 15:28:53,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:53,299 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 331 transitions. [2022-03-15 15:28:53,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:53,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:53,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:53,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:53,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:53,514 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:53,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:53,514 INFO L85 PathProgramCache]: Analyzing trace with hash 688268830, now seen corresponding path program 66 times [2022-03-15 15:28:53,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:53,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652241160] [2022-03-15 15:28:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:53,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:53,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:53,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652241160] [2022-03-15 15:28:53,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652241160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:53,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636556862] [2022-03-15 15:28:53,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:28:53,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:53,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:53,580 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:53,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 15:28:53,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 15:28:53,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:53,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:53,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:53,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:53,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636556862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:53,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:53,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:53,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072623756] [2022-03-15 15:28:53,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:53,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:53,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:53,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:53,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:53,909 INFO L87 Difference]: Start difference. First operand 144 states and 331 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:54,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:54,823 INFO L93 Difference]: Finished difference Result 365 states and 728 transitions. [2022-03-15 15:28:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:28:54,823 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:54,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:54,824 INFO L225 Difference]: With dead ends: 365 [2022-03-15 15:28:54,824 INFO L226 Difference]: Without dead ends: 351 [2022-03-15 15:28:54,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=2153, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:28:54,825 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 217 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:54,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 189 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 15:28:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-15 15:28:54,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 150. [2022-03-15 15:28:54,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.3624161073825505) internal successors, (352), 149 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 352 transitions. [2022-03-15 15:28:54,832 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 352 transitions. Word has length 17 [2022-03-15 15:28:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:54,832 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 352 transitions. [2022-03-15 15:28:54,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:54,832 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 352 transitions. [2022-03-15 15:28:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:54,832 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:54,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:54,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:55,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:55,048 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:55,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:55,049 INFO L85 PathProgramCache]: Analyzing trace with hash 703729626, now seen corresponding path program 67 times [2022-03-15 15:28:55,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:55,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680981744] [2022-03-15 15:28:55,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:55,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:55,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:55,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680981744] [2022-03-15 15:28:55,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680981744] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:55,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114190701] [2022-03-15 15:28:55,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:28:55,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:55,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:55,138 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:55,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 15:28:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:55,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:55,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:55,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:55,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114190701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:55,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:55,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:55,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528336944] [2022-03-15 15:28:55,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:55,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:55,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:55,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:55,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:55,483 INFO L87 Difference]: Start difference. First operand 150 states and 352 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:56,752 INFO L93 Difference]: Finished difference Result 383 states and 757 transitions. [2022-03-15 15:28:56,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 15:28:56,752 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:56,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:56,753 INFO L225 Difference]: With dead ends: 383 [2022-03-15 15:28:56,753 INFO L226 Difference]: Without dead ends: 369 [2022-03-15 15:28:56,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=631, Invalid=2909, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 15:28:56,754 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 199 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:56,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 233 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:56,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-03-15 15:28:56,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 150. [2022-03-15 15:28:56,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.3557046979865772) internal successors, (351), 149 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:56,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 351 transitions. [2022-03-15 15:28:56,760 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 351 transitions. Word has length 17 [2022-03-15 15:28:56,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:56,760 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 351 transitions. [2022-03-15 15:28:56,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:56,760 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 351 transitions. [2022-03-15 15:28:56,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:56,760 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:56,760 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:56,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:56,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:56,976 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:56,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:56,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1275184432, now seen corresponding path program 68 times [2022-03-15 15:28:56,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:56,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725980631] [2022-03-15 15:28:56,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:56,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:57,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:57,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725980631] [2022-03-15 15:28:57,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725980631] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:57,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746690633] [2022-03-15 15:28:57,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:28:57,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:57,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:57,067 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:57,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 15:28:57,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:28:57,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:57,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:57,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:57,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:57,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746690633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:57,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:57,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:28:57,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338671839] [2022-03-15 15:28:57,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:57,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:28:57,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:57,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:28:57,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:28:57,518 INFO L87 Difference]: Start difference. First operand 150 states and 351 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:58,652 INFO L93 Difference]: Finished difference Result 329 states and 654 transitions. [2022-03-15 15:28:58,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 15:28:58,653 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:58,654 INFO L225 Difference]: With dead ends: 329 [2022-03-15 15:28:58,654 INFO L226 Difference]: Without dead ends: 315 [2022-03-15 15:28:58,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=493, Invalid=2369, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 15:28:58,654 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 187 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:58,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 176 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:28:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-03-15 15:28:58,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 149. [2022-03-15 15:28:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.3513513513513513) internal successors, (348), 148 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 348 transitions. [2022-03-15 15:28:58,657 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 348 transitions. Word has length 17 [2022-03-15 15:28:58,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:58,657 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 348 transitions. [2022-03-15 15:28:58,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 348 transitions. [2022-03-15 15:28:58,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:58,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:58,658 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:58,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:58,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-03-15 15:28:58,871 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:58,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:58,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1582367330, now seen corresponding path program 3 times [2022-03-15 15:28:58,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:58,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899344508] [2022-03-15 15:28:58,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:58,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:58,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:58,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899344508] [2022-03-15 15:28:58,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899344508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:58,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619009577] [2022-03-15 15:28:58,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:28:58,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:58,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:58,933 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:58,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 15:28:58,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:28:58,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:58,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 15:28:58,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:59,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:28:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:59,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619009577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:28:59,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:28:59,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-15 15:28:59,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531864067] [2022-03-15 15:28:59,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:28:59,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 15:28:59,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:28:59,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 15:28:59,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-15 15:28:59,188 INFO L87 Difference]: Start difference. First operand 149 states and 348 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:28:59,350 INFO L93 Difference]: Finished difference Result 190 states and 411 transitions. [2022-03-15 15:28:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 15:28:59,350 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:28:59,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:28:59,351 INFO L225 Difference]: With dead ends: 190 [2022-03-15 15:28:59,351 INFO L226 Difference]: Without dead ends: 164 [2022-03-15 15:28:59,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2022-03-15 15:28:59,351 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 85 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:28:59,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 134 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 15:28:59,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-15 15:28:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 149. [2022-03-15 15:28:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.304054054054054) internal successors, (341), 148 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 341 transitions. [2022-03-15 15:28:59,353 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 341 transitions. Word has length 17 [2022-03-15 15:28:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:28:59,353 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 341 transitions. [2022-03-15 15:28:59,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:28:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 341 transitions. [2022-03-15 15:28:59,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 15:28:59,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:28:59,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:28:59,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-15 15:28:59,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:59,563 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:28:59,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:28:59,563 INFO L85 PathProgramCache]: Analyzing trace with hash 737328854, now seen corresponding path program 69 times [2022-03-15 15:28:59,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:28:59,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826773932] [2022-03-15 15:28:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:28:59,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:28:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:28:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:59,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:28:59,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826773932] [2022-03-15 15:28:59,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826773932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:28:59,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110627660] [2022-03-15 15:28:59,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:28:59,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:28:59,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:28:59,652 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:28:59,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 15:28:59,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:28:59,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:28:59,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 15:28:59,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:28:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:28:59,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:00,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110627660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:00,135 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:00,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-03-15 15:29:00,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489943523] [2022-03-15 15:29:00,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:00,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 15:29:00,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:00,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 15:29:00,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-03-15 15:29:00,136 INFO L87 Difference]: Start difference. First operand 149 states and 341 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:01,481 INFO L93 Difference]: Finished difference Result 298 states and 599 transitions. [2022-03-15 15:29:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 15:29:01,482 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 15:29:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:01,483 INFO L225 Difference]: With dead ends: 298 [2022-03-15 15:29:01,483 INFO L226 Difference]: Without dead ends: 284 [2022-03-15 15:29:01,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=528, Invalid=2778, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 15:29:01,483 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 181 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:01,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 171 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 15:29:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-15 15:29:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 152. [2022-03-15 15:29:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.271523178807947) internal successors, (343), 151 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 343 transitions. [2022-03-15 15:29:01,486 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 343 transitions. Word has length 17 [2022-03-15 15:29:01,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:01,486 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 343 transitions. [2022-03-15 15:29:01,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:01,486 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 343 transitions. [2022-03-15 15:29:01,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:29:01,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:01,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:01,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-15 15:29:01,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:01,695 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:29:01,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:01,696 INFO L85 PathProgramCache]: Analyzing trace with hash -28195700, now seen corresponding path program 70 times [2022-03-15 15:29:01,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:01,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458346885] [2022-03-15 15:29:01,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:01,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:01,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:01,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458346885] [2022-03-15 15:29:01,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458346885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:01,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104513139] [2022-03-15 15:29:01,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:29:01,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:01,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:01,800 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:01,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 15:29:01,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:29:01,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:01,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:29:01,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:02,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:02,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104513139] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:02,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:02,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:29:02,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612032253] [2022-03-15 15:29:02,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:02,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:29:02,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:02,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:29:02,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:29:02,871 INFO L87 Difference]: Start difference. First operand 152 states and 343 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:03,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:03,870 INFO L93 Difference]: Finished difference Result 233 states and 484 transitions. [2022-03-15 15:29:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 15:29:03,871 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:29:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:03,871 INFO L225 Difference]: With dead ends: 233 [2022-03-15 15:29:03,872 INFO L226 Difference]: Without dead ends: 226 [2022-03-15 15:29:03,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:29:03,872 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:03,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 142 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 544 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-03-15 15:29:03,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-15 15:29:03,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 154. [2022-03-15 15:29:03,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2745098039215685) internal successors, (348), 153 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:03,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2022-03-15 15:29:03,874 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 19 [2022-03-15 15:29:03,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:03,874 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2022-03-15 15:29:03,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:03,874 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2022-03-15 15:29:03,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:29:03,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:03,875 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:03,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-15 15:29:04,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-15 15:29:04,083 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:29:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:04,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2051098128, now seen corresponding path program 71 times [2022-03-15 15:29:04,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:04,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490240951] [2022-03-15 15:29:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:04,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:04,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:04,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490240951] [2022-03-15 15:29:04,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490240951] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:04,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146365938] [2022-03-15 15:29:04,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:29:04,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:04,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:04,192 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:04,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 15:29:04,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:29:04,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:04,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:29:04,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:04,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:07,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146365938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:07,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:07,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:29:07,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249328942] [2022-03-15 15:29:07,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:07,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:29:07,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:07,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:29:07,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:29:07,722 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:15,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:15,754 INFO L93 Difference]: Finished difference Result 283 states and 579 transitions. [2022-03-15 15:29:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 15:29:15,755 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:29:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:15,756 INFO L225 Difference]: With dead ends: 283 [2022-03-15 15:29:15,756 INFO L226 Difference]: Without dead ends: 276 [2022-03-15 15:29:15,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=450, Invalid=2306, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 15:29:15,756 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 166 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:15,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 194 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 801 Invalid, 0 Unknown, 38 Unchecked, 1.9s Time] [2022-03-15 15:29:15,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-03-15 15:29:15,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 154. [2022-03-15 15:29:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2745098039215685) internal successors, (348), 153 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:15,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2022-03-15 15:29:15,759 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 19 [2022-03-15 15:29:15,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:15,759 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2022-03-15 15:29:15,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:15,759 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2022-03-15 15:29:15,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:29:15,759 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:15,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:15,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:15,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-15 15:29:15,960 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:29:15,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:15,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2066558924, now seen corresponding path program 72 times [2022-03-15 15:29:15,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:15,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201495223] [2022-03-15 15:29:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:15,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:16,399 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:16,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201495223] [2022-03-15 15:29:16,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201495223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:16,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522701020] [2022-03-15 15:29:16,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:29:16,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:16,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:16,401 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:16,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 15:29:16,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:29:16,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:16,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:29:16,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:17,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:18,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522701020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:18,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:18,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:29:18,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232260117] [2022-03-15 15:29:18,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:18,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:29:18,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:18,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:29:18,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:29:18,859 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:25,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:25,438 INFO L93 Difference]: Finished difference Result 270 states and 559 transitions. [2022-03-15 15:29:25,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 15:29:25,439 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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 19 [2022-03-15 15:29:25,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:25,439 INFO L225 Difference]: With dead ends: 270 [2022-03-15 15:29:25,439 INFO L226 Difference]: Without dead ends: 263 [2022-03-15 15:29:25,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=384, Invalid=1872, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:29:25,440 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 138 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:25,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 171 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 701 Invalid, 0 Unknown, 86 Unchecked, 1.6s Time] [2022-03-15 15:29:25,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-15 15:29:25,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 152. [2022-03-15 15:29:25,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.271523178807947) internal successors, (343), 151 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:25,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 343 transitions. [2022-03-15 15:29:25,442 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 343 transitions. Word has length 19 [2022-03-15 15:29:25,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:25,442 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 343 transitions. [2022-03-15 15:29:25,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:25,443 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 343 transitions. [2022-03-15 15:29:25,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:29:25,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:25,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:25,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-15 15:29:25,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:25,643 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:29:25,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:25,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1035426080, now seen corresponding path program 73 times [2022-03-15 15:29:25,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:25,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218149793] [2022-03-15 15:29:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:25,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:26,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:26,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218149793] [2022-03-15 15:29:26,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218149793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:26,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252431437] [2022-03-15 15:29:26,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:29:26,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:26,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:26,084 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:26,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 15:29:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:26,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:29:26,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:27,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:28,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252431437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:28,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:28,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:29:28,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973972173] [2022-03-15 15:29:28,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:28,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:29:28,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:28,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:29:28,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:29:28,826 INFO L87 Difference]: Start difference. First operand 152 states and 343 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:33,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:33,692 INFO L93 Difference]: Finished difference Result 285 states and 574 transitions. [2022-03-15 15:29:33,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:29:33,693 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:29:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:33,694 INFO L225 Difference]: With dead ends: 285 [2022-03-15 15:29:33,694 INFO L226 Difference]: Without dead ends: 278 [2022-03-15 15:29:33,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=340, Invalid=2012, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 15:29:33,694 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 145 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:33,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 193 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 730 Invalid, 0 Unknown, 43 Unchecked, 1.6s Time] [2022-03-15 15:29:33,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-03-15 15:29:33,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 153. [2022-03-15 15:29:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2828947368421053) internal successors, (347), 152 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 347 transitions. [2022-03-15 15:29:33,697 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 347 transitions. Word has length 19 [2022-03-15 15:29:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:33,697 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 347 transitions. [2022-03-15 15:29:33,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:33,697 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 347 transitions. [2022-03-15 15:29:33,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:29:33,697 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:33,697 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:33,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-15 15:29:33,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:33,907 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:29:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:33,908 INFO L85 PathProgramCache]: Analyzing trace with hash 652705692, now seen corresponding path program 74 times [2022-03-15 15:29:33,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:33,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311203315] [2022-03-15 15:29:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:33,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:34,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:34,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311203315] [2022-03-15 15:29:34,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311203315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:34,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744713100] [2022-03-15 15:29:34,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:29:34,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:34,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:34,327 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:34,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 15:29:34,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:29:34,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:34,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:29:34,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:35,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:37,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744713100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:37,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:37,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:29:37,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313171177] [2022-03-15 15:29:37,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:37,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:29:37,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:37,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:29:37,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:29:37,133 INFO L87 Difference]: Start difference. First operand 153 states and 347 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:42,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:42,394 INFO L93 Difference]: Finished difference Result 297 states and 594 transitions. [2022-03-15 15:29:42,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 15:29:42,395 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:29:42,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:42,396 INFO L225 Difference]: With dead ends: 297 [2022-03-15 15:29:42,396 INFO L226 Difference]: Without dead ends: 290 [2022-03-15 15:29:42,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=386, Invalid=2266, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:29:42,396 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 141 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:42,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 253 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 796 Invalid, 0 Unknown, 85 Unchecked, 1.8s Time] [2022-03-15 15:29:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-15 15:29:42,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 155. [2022-03-15 15:29:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2857142857142856) internal successors, (352), 154 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 352 transitions. [2022-03-15 15:29:42,399 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 352 transitions. Word has length 19 [2022-03-15 15:29:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:42,399 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 352 transitions. [2022-03-15 15:29:42,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:42,399 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 352 transitions. [2022-03-15 15:29:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:29:42,399 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:42,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:42,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-15 15:29:42,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-15 15:29:42,607 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:29:42,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:42,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1562967776, now seen corresponding path program 75 times [2022-03-15 15:29:42,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:42,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242778641] [2022-03-15 15:29:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:42,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:43,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:43,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242778641] [2022-03-15 15:29:43,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242778641] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:43,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477296] [2022-03-15 15:29:43,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:29:43,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:43,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:43,050 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:43,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 15:29:43,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:29:43,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:43,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:29:43,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:43,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:29:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:45,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:29:45,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:29:45,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:29:45,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37984381] [2022-03-15 15:29:45,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:29:45,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:29:45,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:29:45,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:29:45,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:29:45,264 INFO L87 Difference]: Start difference. First operand 155 states and 352 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:52,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:29:52,813 INFO L93 Difference]: Finished difference Result 342 states and 680 transitions. [2022-03-15 15:29:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 15:29:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:29:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:29:52,814 INFO L225 Difference]: With dead ends: 342 [2022-03-15 15:29:52,814 INFO L226 Difference]: Without dead ends: 335 [2022-03-15 15:29:52,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=591, Invalid=3315, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 15:29:52,815 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 209 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:29:52,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 268 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1041 Invalid, 0 Unknown, 108 Unchecked, 2.2s Time] [2022-03-15 15:29:52,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-03-15 15:29:52,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 155. [2022-03-15 15:29:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2857142857142856) internal successors, (352), 154 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 352 transitions. [2022-03-15 15:29:52,817 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 352 transitions. Word has length 19 [2022-03-15 15:29:52,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:29:52,817 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 352 transitions. [2022-03-15 15:29:52,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:29:52,817 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 352 transitions. [2022-03-15 15:29:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:29:52,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:29:52,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:29:52,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-15 15:29:53,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:53,018 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:29:53,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:29:53,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1547506980, now seen corresponding path program 76 times [2022-03-15 15:29:53,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:29:53,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740431633] [2022-03-15 15:29:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:29:53,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:29:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:29:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:53,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:29:53,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740431633] [2022-03-15 15:29:53,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740431633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:29:53,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168848003] [2022-03-15 15:29:53,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:29:53,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:29:53,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:29:53,446 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:29:53,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 15:29:53,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:29:53,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:29:53,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:29:53,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:29:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:29:54,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:00,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168848003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:00,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:00,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:30:00,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286769655] [2022-03-15 15:30:00,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:00,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:30:00,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:00,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:30:00,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=588, Unknown=1, NotChecked=0, Total=702 [2022-03-15 15:30:00,324 INFO L87 Difference]: Start difference. First operand 155 states and 352 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:07,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:07,227 INFO L93 Difference]: Finished difference Result 334 states and 669 transitions. [2022-03-15 15:30:07,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 15:30:07,227 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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 19 [2022-03-15 15:30:07,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:07,228 INFO L225 Difference]: With dead ends: 334 [2022-03-15 15:30:07,228 INFO L226 Difference]: Without dead ends: 327 [2022-03-15 15:30:07,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=513, Invalid=2678, Unknown=1, NotChecked=0, Total=3192 [2022-03-15 15:30:07,229 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 204 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:07,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 225 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 817 Invalid, 0 Unknown, 55 Unchecked, 2.0s Time] [2022-03-15 15:30:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-03-15 15:30:07,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 154. [2022-03-15 15:30:07,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2745098039215685) internal successors, (348), 153 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2022-03-15 15:30:07,242 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 19 [2022-03-15 15:30:07,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:07,242 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2022-03-15 15:30:07,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2022-03-15 15:30:07,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:30:07,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:07,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:07,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-15 15:30:07,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:07,443 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:30:07,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:07,444 INFO L85 PathProgramCache]: Analyzing trace with hash -534814448, now seen corresponding path program 77 times [2022-03-15 15:30:07,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:07,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159473320] [2022-03-15 15:30:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:07,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:07,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:07,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159473320] [2022-03-15 15:30:07,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159473320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:07,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175018986] [2022-03-15 15:30:07,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:30:07,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:07,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:07,919 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:07,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 15:30:07,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:30:07,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:07,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:30:07,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:08,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:10,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175018986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:10,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:10,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:30:10,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829331159] [2022-03-15 15:30:10,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:10,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:30:10,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:10,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:30:10,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:30:10,772 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:16,277 INFO L93 Difference]: Finished difference Result 293 states and 597 transitions. [2022-03-15 15:30:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 15:30:16,278 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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 19 [2022-03-15 15:30:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:16,278 INFO L225 Difference]: With dead ends: 293 [2022-03-15 15:30:16,278 INFO L226 Difference]: Without dead ends: 286 [2022-03-15 15:30:16,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=427, Invalid=2225, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:30:16,279 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 145 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:16,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 186 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 810 Invalid, 0 Unknown, 84 Unchecked, 1.8s Time] [2022-03-15 15:30:16,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-03-15 15:30:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 154. [2022-03-15 15:30:16,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2745098039215685) internal successors, (348), 153 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2022-03-15 15:30:16,281 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 19 [2022-03-15 15:30:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:16,282 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2022-03-15 15:30:16,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:16,282 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2022-03-15 15:30:16,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:30:16,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:16,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:16,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-15 15:30:16,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-15 15:30:16,483 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:30:16,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:16,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1595895516, now seen corresponding path program 78 times [2022-03-15 15:30:16,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:16,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470682979] [2022-03-15 15:30:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:16,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:16,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:16,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470682979] [2022-03-15 15:30:16,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470682979] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:16,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300224242] [2022-03-15 15:30:16,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:30:16,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:16,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:16,953 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:16,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 15:30:16,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:30:16,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:16,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:30:16,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:17,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:19,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300224242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:19,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:19,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:30:19,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058181444] [2022-03-15 15:30:19,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:19,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:30:19,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:19,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:30:19,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:30:19,330 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:25,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:25,418 INFO L93 Difference]: Finished difference Result 324 states and 649 transitions. [2022-03-15 15:30:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 15:30:25,418 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:30:25,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:25,419 INFO L225 Difference]: With dead ends: 324 [2022-03-15 15:30:25,420 INFO L226 Difference]: Without dead ends: 317 [2022-03-15 15:30:25,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 15:30:25,420 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 199 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:25,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 184 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 750 Invalid, 0 Unknown, 94 Unchecked, 1.7s Time] [2022-03-15 15:30:25,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-03-15 15:30:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 155. [2022-03-15 15:30:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.272727272727273) internal successors, (350), 154 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 350 transitions. [2022-03-15 15:30:25,423 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 350 transitions. Word has length 19 [2022-03-15 15:30:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:25,423 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 350 transitions. [2022-03-15 15:30:25,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 350 transitions. [2022-03-15 15:30:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:30:25,423 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:25,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:25,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-15 15:30:25,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:25,624 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:30:25,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:25,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1611356312, now seen corresponding path program 79 times [2022-03-15 15:30:25,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:25,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736641386] [2022-03-15 15:30:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:25,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:26,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:26,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736641386] [2022-03-15 15:30:26,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736641386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:26,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108973072] [2022-03-15 15:30:26,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:30:26,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:26,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:26,076 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:26,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 15:30:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:26,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:30:26,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:26,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:28,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108973072] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:28,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:28,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:30:28,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682311461] [2022-03-15 15:30:28,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:28,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:30:28,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:28,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:30:28,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:30:28,248 INFO L87 Difference]: Start difference. First operand 155 states and 350 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:33,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:33,631 INFO L93 Difference]: Finished difference Result 315 states and 637 transitions. [2022-03-15 15:30:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 15:30:33,631 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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 19 [2022-03-15 15:30:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:33,632 INFO L225 Difference]: With dead ends: 315 [2022-03-15 15:30:33,632 INFO L226 Difference]: Without dead ends: 308 [2022-03-15 15:30:33,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=490, Invalid=2702, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 15:30:33,633 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 157 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:33,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 176 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 723 Invalid, 0 Unknown, 97 Unchecked, 1.6s Time] [2022-03-15 15:30:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-15 15:30:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 156. [2022-03-15 15:30:33,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2774193548387096) internal successors, (353), 155 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 353 transitions. [2022-03-15 15:30:33,636 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 353 transitions. Word has length 19 [2022-03-15 15:30:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:33,636 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 353 transitions. [2022-03-15 15:30:33,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:33,636 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 353 transitions. [2022-03-15 15:30:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:30:33,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:33,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:33,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-15 15:30:33,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:33,847 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:30:33,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:33,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2112156178, now seen corresponding path program 80 times [2022-03-15 15:30:33,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:33,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679479260] [2022-03-15 15:30:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:33,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:34,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:34,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679479260] [2022-03-15 15:30:34,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679479260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:34,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665561912] [2022-03-15 15:30:34,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:30:34,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:34,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:34,272 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:34,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 15:30:34,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:30:34,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:34,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:30:34,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:35,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:36,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665561912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:36,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:36,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:30:36,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230117581] [2022-03-15 15:30:36,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:36,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:30:36,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:36,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:30:36,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:30:36,758 INFO L87 Difference]: Start difference. First operand 156 states and 353 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:41,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:41,091 INFO L93 Difference]: Finished difference Result 266 states and 543 transitions. [2022-03-15 15:30:41,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:30:41,091 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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 19 [2022-03-15 15:30:41,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:41,092 INFO L225 Difference]: With dead ends: 266 [2022-03-15 15:30:41,092 INFO L226 Difference]: Without dead ends: 259 [2022-03-15 15:30:41,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=320, Invalid=1842, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 15:30:41,093 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 107 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:41,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 165 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 676 Invalid, 0 Unknown, 84 Unchecked, 1.6s Time] [2022-03-15 15:30:41,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-15 15:30:41,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 153. [2022-03-15 15:30:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2697368421052633) internal successors, (345), 152 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 345 transitions. [2022-03-15 15:30:41,095 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 345 transitions. Word has length 19 [2022-03-15 15:30:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:41,095 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 345 transitions. [2022-03-15 15:30:41,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 345 transitions. [2022-03-15 15:30:41,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:30:41,095 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:41,096 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:41,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-15 15:30:41,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:41,296 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:30:41,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:41,296 INFO L85 PathProgramCache]: Analyzing trace with hash 350983832, now seen corresponding path program 81 times [2022-03-15 15:30:41,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:41,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356595836] [2022-03-15 15:30:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:41,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:41,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:41,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356595836] [2022-03-15 15:30:41,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356595836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:41,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428162223] [2022-03-15 15:30:41,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:30:41,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:41,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:41,765 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:41,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 15:30:41,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:30:41,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:41,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:30:41,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:42,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:44,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428162223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:44,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:44,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:30:44,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258669669] [2022-03-15 15:30:44,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:44,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:30:44,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:44,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:30:44,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:30:44,482 INFO L87 Difference]: Start difference. First operand 153 states and 345 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:50,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:50,525 INFO L93 Difference]: Finished difference Result 307 states and 619 transitions. [2022-03-15 15:30:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 15:30:50,525 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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 19 [2022-03-15 15:30:50,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:50,526 INFO L225 Difference]: With dead ends: 307 [2022-03-15 15:30:50,526 INFO L226 Difference]: Without dead ends: 300 [2022-03-15 15:30:50,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 15:30:50,527 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 151 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:50,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 216 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 897 Invalid, 0 Unknown, 68 Unchecked, 2.1s Time] [2022-03-15 15:30:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-03-15 15:30:50,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 152. [2022-03-15 15:30:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2649006622516556) internal successors, (342), 151 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 342 transitions. [2022-03-15 15:30:50,529 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 342 transitions. Word has length 19 [2022-03-15 15:30:50,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:50,529 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 342 transitions. [2022-03-15 15:30:50,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 342 transitions. [2022-03-15 15:30:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:30:50,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:50,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:50,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-15 15:30:50,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:50,739 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:30:50,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:50,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1797812704, now seen corresponding path program 82 times [2022-03-15 15:30:50,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:50,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044345058] [2022-03-15 15:30:50,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:50,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:30:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:51,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:30:51,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044345058] [2022-03-15 15:30:51,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044345058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:30:51,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380194770] [2022-03-15 15:30:51,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:30:51,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:51,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:30:51,228 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:30:51,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 15:30:51,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:30:51,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:30:51,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:30:51,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:30:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:52,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:30:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:30:53,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380194770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:30:53,932 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:30:53,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:30:53,932 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673329874] [2022-03-15 15:30:53,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:30:53,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:30:53,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:30:53,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:30:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:30:53,933 INFO L87 Difference]: Start difference. First operand 152 states and 342 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:59,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:30:59,551 INFO L93 Difference]: Finished difference Result 333 states and 663 transitions. [2022-03-15 15:30:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 15:30:59,551 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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 19 [2022-03-15 15:30:59,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:30:59,552 INFO L225 Difference]: With dead ends: 333 [2022-03-15 15:30:59,552 INFO L226 Difference]: Without dead ends: 326 [2022-03-15 15:30:59,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=485, Invalid=2821, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 15:30:59,553 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 165 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 15:30:59,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 200 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 838 Invalid, 0 Unknown, 71 Unchecked, 1.8s Time] [2022-03-15 15:30:59,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-15 15:30:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 153. [2022-03-15 15:30:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2697368421052633) internal successors, (345), 152 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 345 transitions. [2022-03-15 15:30:59,577 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 345 transitions. Word has length 19 [2022-03-15 15:30:59,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:30:59,577 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 345 transitions. [2022-03-15 15:30:59,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:30:59,578 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 345 transitions. [2022-03-15 15:30:59,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:30:59,578 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:30:59,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:30:59,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-15 15:30:59,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:30:59,792 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:30:59,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:30:59,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1226357898, now seen corresponding path program 83 times [2022-03-15 15:30:59,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:30:59,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953293122] [2022-03-15 15:30:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:30:59,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:30:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:00,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:00,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953293122] [2022-03-15 15:31:00,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953293122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:00,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487419642] [2022-03-15 15:31:00,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:31:00,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:00,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:00,213 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:00,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 15:31:00,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 15:31:00,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:31:00,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:31:00,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:01,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:02,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487419642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:02,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:02,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:31:02,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999881095] [2022-03-15 15:31:02,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:02,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:31:02,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:02,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:31:02,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:31:02,864 INFO L87 Difference]: Start difference. First operand 153 states and 345 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:31:07,574 INFO L93 Difference]: Finished difference Result 280 states and 560 transitions. [2022-03-15 15:31:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:31:07,575 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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 19 [2022-03-15 15:31:07,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:31:07,576 INFO L225 Difference]: With dead ends: 280 [2022-03-15 15:31:07,576 INFO L226 Difference]: Without dead ends: 273 [2022-03-15 15:31:07,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=323, Invalid=1933, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:31:07,576 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 112 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:31:07,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 210 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 841 Invalid, 0 Unknown, 37 Unchecked, 2.0s Time] [2022-03-15 15:31:07,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-15 15:31:07,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 151. [2022-03-15 15:31:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2666666666666666) internal successors, (340), 150 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 340 transitions. [2022-03-15 15:31:07,579 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 340 transitions. Word has length 19 [2022-03-15 15:31:07,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:31:07,579 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 340 transitions. [2022-03-15 15:31:07,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 340 transitions. [2022-03-15 15:31:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:31:07,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:31:07,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:31:07,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-15 15:31:07,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-15 15:31:07,788 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:31:07,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:31:07,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1387602208, now seen corresponding path program 84 times [2022-03-15 15:31:07,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:31:07,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31420348] [2022-03-15 15:31:07,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:31:07,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:31:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:08,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:08,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31420348] [2022-03-15 15:31:08,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31420348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:08,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188875237] [2022-03-15 15:31:08,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:31:08,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:08,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:08,264 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:08,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:31:08,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:31:08,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:31:08,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:08,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 15:31:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:09,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:10,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188875237] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:10,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:10,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:31:10,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532689426] [2022-03-15 15:31:10,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:10,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:31:10,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:10,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:31:10,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:31:10,673 INFO L87 Difference]: Start difference. First operand 151 states and 340 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:17,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:31:17,909 INFO L93 Difference]: Finished difference Result 358 states and 694 transitions. [2022-03-15 15:31:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 15:31:17,910 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:31:17,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:31:17,911 INFO L225 Difference]: With dead ends: 358 [2022-03-15 15:31:17,911 INFO L226 Difference]: Without dead ends: 351 [2022-03-15 15:31:17,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=543, Invalid=2997, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 15:31:17,912 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 264 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:31:17,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 234 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 847 Invalid, 0 Unknown, 105 Unchecked, 2.0s Time] [2022-03-15 15:31:17,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-15 15:31:17,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 151. [2022-03-15 15:31:17,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2666666666666666) internal successors, (340), 150 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 340 transitions. [2022-03-15 15:31:17,914 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 340 transitions. Word has length 19 [2022-03-15 15:31:17,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:31:17,914 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 340 transitions. [2022-03-15 15:31:17,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 340 transitions. [2022-03-15 15:31:17,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:31:17,915 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:31:17,915 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:31:17,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-15 15:31:18,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-15 15:31:18,117 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:31:18,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:31:18,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1403063004, now seen corresponding path program 85 times [2022-03-15 15:31:18,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:31:18,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620550907] [2022-03-15 15:31:18,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:31:18,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:31:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:18,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:18,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620550907] [2022-03-15 15:31:18,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620550907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:18,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789394710] [2022-03-15 15:31:18,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:31:18,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:18,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:18,595 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:18,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 15:31:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:18,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:31:18,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:19,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:21,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789394710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:21,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:21,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:31:21,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876943042] [2022-03-15 15:31:21,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:21,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:31:21,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:21,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:31:21,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:31:21,446 INFO L87 Difference]: Start difference. First operand 151 states and 340 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:31:28,949 INFO L93 Difference]: Finished difference Result 359 states and 701 transitions. [2022-03-15 15:31:28,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 15:31:28,949 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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 19 [2022-03-15 15:31:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:31:28,950 INFO L225 Difference]: With dead ends: 359 [2022-03-15 15:31:28,950 INFO L226 Difference]: Without dead ends: 352 [2022-03-15 15:31:28,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=525, Invalid=3257, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 15:31:28,951 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 196 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:31:28,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 284 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1047 Invalid, 0 Unknown, 65 Unchecked, 2.5s Time] [2022-03-15 15:31:28,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-15 15:31:28,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 152. [2022-03-15 15:31:28,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.271523178807947) internal successors, (343), 151 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 343 transitions. [2022-03-15 15:31:28,954 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 343 transitions. Word has length 19 [2022-03-15 15:31:28,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:31:28,954 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 343 transitions. [2022-03-15 15:31:28,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:28,954 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 343 transitions. [2022-03-15 15:31:28,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:31:28,954 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:31:28,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:31:28,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-15 15:31:29,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:29,163 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:31:29,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:31:29,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1974517810, now seen corresponding path program 86 times [2022-03-15 15:31:29,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:31:29,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286120013] [2022-03-15 15:31:29,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:31:29,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:31:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:29,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:29,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286120013] [2022-03-15 15:31:29,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286120013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:29,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014316439] [2022-03-15 15:31:29,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:31:29,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:29,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:29,588 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:29,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 15:31:29,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:31:29,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:31:29,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:31:29,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:30,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:32,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014316439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:32,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:32,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:31:32,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531704066] [2022-03-15 15:31:32,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:32,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:31:32,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:32,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:31:32,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:31:32,170 INFO L87 Difference]: Start difference. First operand 152 states and 343 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:38,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:31:38,059 INFO L93 Difference]: Finished difference Result 315 states and 613 transitions. [2022-03-15 15:31:38,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 15:31:38,060 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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 19 [2022-03-15 15:31:38,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:31:38,061 INFO L225 Difference]: With dead ends: 315 [2022-03-15 15:31:38,061 INFO L226 Difference]: Without dead ends: 308 [2022-03-15 15:31:38,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=416, Invalid=2554, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 15:31:38,061 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 178 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 15:31:38,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 230 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 755 Invalid, 0 Unknown, 88 Unchecked, 1.8s Time] [2022-03-15 15:31:38,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-15 15:31:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 151. [2022-03-15 15:31:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2666666666666666) internal successors, (340), 150 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 340 transitions. [2022-03-15 15:31:38,064 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 340 transitions. Word has length 19 [2022-03-15 15:31:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:31:38,064 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 340 transitions. [2022-03-15 15:31:38,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:38,064 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 340 transitions. [2022-03-15 15:31:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:31:38,064 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:31:38,064 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:31:38,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-15 15:31:38,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:38,265 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:31:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:31:38,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1436662232, now seen corresponding path program 87 times [2022-03-15 15:31:38,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:31:38,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662336324] [2022-03-15 15:31:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:31:38,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:31:38,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:38,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:38,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662336324] [2022-03-15 15:31:38,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662336324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:38,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507640545] [2022-03-15 15:31:38,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:31:38,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:38,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:38,719 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:38,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 15:31:38,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 15:31:38,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:31:38,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:31:38,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:39,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:41,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507640545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:41,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:41,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:31:41,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668093825] [2022-03-15 15:31:41,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:41,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:31:41,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:41,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:31:41,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:31:41,224 INFO L87 Difference]: Start difference. First operand 151 states and 340 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:46,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:31:46,879 INFO L93 Difference]: Finished difference Result 302 states and 591 transitions. [2022-03-15 15:31:46,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 15:31:46,880 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 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 19 [2022-03-15 15:31:46,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:31:46,881 INFO L225 Difference]: With dead ends: 302 [2022-03-15 15:31:46,881 INFO L226 Difference]: Without dead ends: 295 [2022-03-15 15:31:46,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=407, Invalid=2563, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 15:31:46,881 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 183 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:31:46,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 259 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 953 Invalid, 0 Unknown, 94 Unchecked, 2.1s Time] [2022-03-15 15:31:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-15 15:31:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 151. [2022-03-15 15:31:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2666666666666666) internal successors, (340), 150 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 340 transitions. [2022-03-15 15:31:46,884 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 340 transitions. Word has length 19 [2022-03-15 15:31:46,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:31:46,884 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 340 transitions. [2022-03-15 15:31:46,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:46,884 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 340 transitions. [2022-03-15 15:31:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:31:46,884 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:31:46,884 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:31:46,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-15 15:31:47,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:47,085 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:31:47,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:31:47,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1604679460, now seen corresponding path program 88 times [2022-03-15 15:31:47,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:31:47,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400832520] [2022-03-15 15:31:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:31:47,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:31:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:47,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:47,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400832520] [2022-03-15 15:31:47,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400832520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:47,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885753569] [2022-03-15 15:31:47,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:31:47,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:47,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:47,500 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:47,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 15:31:47,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:31:47,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:31:47,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:31:47,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:48,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:50,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885753569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:50,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:50,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:31:50,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004079223] [2022-03-15 15:31:50,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:50,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:31:50,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:50,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:31:50,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:31:50,077 INFO L87 Difference]: Start difference. First operand 151 states and 340 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) [2022-03-15 15:31:56,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:31:56,529 INFO L93 Difference]: Finished difference Result 285 states and 560 transitions. [2022-03-15 15:31:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 15:31:56,529 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 19 [2022-03-15 15:31:56,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:31:56,530 INFO L225 Difference]: With dead ends: 285 [2022-03-15 15:31:56,530 INFO L226 Difference]: Without dead ends: 278 [2022-03-15 15:31:56,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=458, Invalid=2964, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 15:31:56,531 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 171 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:31:56,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 246 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 984 Invalid, 0 Unknown, 97 Unchecked, 2.2s Time] [2022-03-15 15:31:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-03-15 15:31:56,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 151. [2022-03-15 15:31:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2666666666666666) internal successors, (340), 150 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:31:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 340 transitions. [2022-03-15 15:31:56,533 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 340 transitions. Word has length 19 [2022-03-15 15:31:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:31:56,533 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 340 transitions. [2022-03-15 15:31:56,533 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) [2022-03-15 15:31:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 340 transitions. [2022-03-15 15:31:56,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:31:56,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:31:56,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:31:56,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-15 15:31:56,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:56,735 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:31:56,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:31:56,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1987399848, now seen corresponding path program 89 times [2022-03-15 15:31:56,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:31:56,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995764538] [2022-03-15 15:31:56,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:31:56,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:31:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:31:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:57,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:31:57,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995764538] [2022-03-15 15:31:57,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995764538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:31:57,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133710049] [2022-03-15 15:31:57,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:31:57,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:31:57,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:31:57,144 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:31:57,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 15:31:57,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:31:57,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:31:57,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:31:57,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:31:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:58,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:31:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:31:59,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133710049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:31:59,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:31:59,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:31:59,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815420006] [2022-03-15 15:31:59,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:31:59,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:31:59,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:31:59,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:31:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:31:59,647 INFO L87 Difference]: Start difference. First operand 151 states and 340 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) [2022-03-15 15:32:06,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:32:06,030 INFO L93 Difference]: Finished difference Result 294 states and 575 transitions. [2022-03-15 15:32:06,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 15:32:06,031 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 19 [2022-03-15 15:32:06,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:32:06,032 INFO L225 Difference]: With dead ends: 294 [2022-03-15 15:32:06,032 INFO L226 Difference]: Without dead ends: 287 [2022-03-15 15:32:06,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=477, Invalid=3063, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 15:32:06,032 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 199 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 15:32:06,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 226 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 802 Invalid, 0 Unknown, 101 Unchecked, 1.9s Time] [2022-03-15 15:32:06,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-15 15:32:06,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 153. [2022-03-15 15:32:06,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2697368421052633) internal successors, (345), 152 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:32:06,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 345 transitions. [2022-03-15 15:32:06,035 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 345 transitions. Word has length 19 [2022-03-15 15:32:06,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:32:06,035 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 345 transitions. [2022-03-15 15:32:06,035 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) [2022-03-15 15:32:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 345 transitions. [2022-03-15 15:32:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:32:06,035 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:32:06,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:32:06,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-15 15:32:06,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:32:06,243 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:32:06,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:32:06,244 INFO L85 PathProgramCache]: Analyzing trace with hash 91893980, now seen corresponding path program 90 times [2022-03-15 15:32:06,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:32:06,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152188385] [2022-03-15 15:32:06,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:32:06,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:32:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:32:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:06,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:32:06,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152188385] [2022-03-15 15:32:06,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152188385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:32:06,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802835009] [2022-03-15 15:32:06,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:32:06,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:32:06,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:32:06,661 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:32:06,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 15:32:06,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:32:06,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:32:06,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:32:06,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:32:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:07,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:32:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:09,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802835009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:32:09,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:32:09,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:32:09,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652943530] [2022-03-15 15:32:09,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:32:09,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:32:09,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:32:09,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:32:09,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:32:09,076 INFO L87 Difference]: Start difference. First operand 153 states and 345 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) [2022-03-15 15:32:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:32:17,432 INFO L93 Difference]: Finished difference Result 336 states and 656 transitions. [2022-03-15 15:32:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 15:32:17,433 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 19 [2022-03-15 15:32:17,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:32:17,434 INFO L225 Difference]: With dead ends: 336 [2022-03-15 15:32:17,434 INFO L226 Difference]: Without dead ends: 329 [2022-03-15 15:32:17,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=634, Invalid=3922, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 15:32:17,435 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 249 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:32:17,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 233 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1011 Invalid, 0 Unknown, 113 Unchecked, 2.4s Time] [2022-03-15 15:32:17,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-03-15 15:32:17,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 153. [2022-03-15 15:32:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2697368421052633) internal successors, (345), 152 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:32:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 345 transitions. [2022-03-15 15:32:17,437 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 345 transitions. Word has length 19 [2022-03-15 15:32:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:32:17,437 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 345 transitions. [2022-03-15 15:32:17,437 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) [2022-03-15 15:32:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 345 transitions. [2022-03-15 15:32:17,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:32:17,438 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:32:17,438 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:32:17,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-15 15:32:17,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-15 15:32:17,638 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:32:17,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:32:17,639 INFO L85 PathProgramCache]: Analyzing trace with hash 107354776, now seen corresponding path program 91 times [2022-03-15 15:32:17,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:32:17,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573713466] [2022-03-15 15:32:17,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:32:17,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:32:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:32:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:18,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:32:18,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573713466] [2022-03-15 15:32:18,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573713466] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:32:18,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190070590] [2022-03-15 15:32:18,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:32:18,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:32:18,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:32:18,078 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:32:18,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 15:32:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:32:18,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:32:18,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:32:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:18,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:32:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:20,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190070590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:32:20,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:32:20,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:32:20,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179400551] [2022-03-15 15:32:20,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:32:20,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:32:20,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:32:20,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:32:20,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:32:20,333 INFO L87 Difference]: Start difference. First operand 153 states and 345 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) [2022-03-15 15:32:27,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:32:27,534 INFO L93 Difference]: Finished difference Result 329 states and 648 transitions. [2022-03-15 15:32:27,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 15:32:27,534 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 19 [2022-03-15 15:32:27,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:32:27,535 INFO L225 Difference]: With dead ends: 329 [2022-03-15 15:32:27,535 INFO L226 Difference]: Without dead ends: 322 [2022-03-15 15:32:27,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=549, Invalid=3233, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 15:32:27,536 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 210 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:32:27,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 214 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 941 Invalid, 0 Unknown, 112 Unchecked, 2.2s Time] [2022-03-15 15:32:27,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-03-15 15:32:27,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 153. [2022-03-15 15:32:27,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2697368421052633) internal successors, (345), 152 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:32:27,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 345 transitions. [2022-03-15 15:32:27,538 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 345 transitions. Word has length 19 [2022-03-15 15:32:27,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:32:27,538 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 345 transitions. [2022-03-15 15:32:27,538 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) [2022-03-15 15:32:27,539 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 345 transitions. [2022-03-15 15:32:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:32:27,539 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:32:27,539 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:32:27,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-15 15:32:27,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:32:27,739 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:32:27,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:32:27,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1120047308, now seen corresponding path program 92 times [2022-03-15 15:32:27,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:32:27,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748088459] [2022-03-15 15:32:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:32:27,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:32:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:32:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:28,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:32:28,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748088459] [2022-03-15 15:32:28,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748088459] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:32:28,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092389571] [2022-03-15 15:32:28,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:32:28,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:32:28,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:32:28,150 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:32:28,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 15:32:28,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:32:28,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:32:28,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:32:28,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:32:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:29,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:32:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:30,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092389571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:32:30,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:32:30,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:32:30,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674565176] [2022-03-15 15:32:30,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:32:30,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:32:30,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:32:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:32:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:32:30,605 INFO L87 Difference]: Start difference. First operand 153 states and 345 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) [2022-03-15 15:32:36,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:32:36,295 INFO L93 Difference]: Finished difference Result 296 states and 595 transitions. [2022-03-15 15:32:36,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 15:32:36,296 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 19 [2022-03-15 15:32:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:32:36,296 INFO L225 Difference]: With dead ends: 296 [2022-03-15 15:32:36,296 INFO L226 Difference]: Without dead ends: 289 [2022-03-15 15:32:36,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=454, Invalid=2516, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 15:32:36,297 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 166 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 15:32:36,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 199 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 823 Invalid, 0 Unknown, 99 Unchecked, 1.9s Time] [2022-03-15 15:32:36,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-03-15 15:32:36,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 153. [2022-03-15 15:32:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2697368421052633) internal successors, (345), 152 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:32:36,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 345 transitions. [2022-03-15 15:32:36,299 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 345 transitions. Word has length 19 [2022-03-15 15:32:36,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:32:36,299 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 345 transitions. [2022-03-15 15:32:36,299 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) [2022-03-15 15:32:36,299 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 345 transitions. [2022-03-15 15:32:36,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:32:36,300 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:32:36,300 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:32:36,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-15 15:32:36,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:32:36,507 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:32:36,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:32:36,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1044210024, now seen corresponding path program 93 times [2022-03-15 15:32:36,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:32:36,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703224790] [2022-03-15 15:32:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:32:36,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:32:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:32:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:36,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:32:36,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703224790] [2022-03-15 15:32:36,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703224790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:32:36,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328966755] [2022-03-15 15:32:36,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:32:36,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:32:36,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:32:36,980 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:32:36,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 15:32:37,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:32:37,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:32:37,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:32:37,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:32:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:37,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:32:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:39,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328966755] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:32:39,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:32:39,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:32:39,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846188321] [2022-03-15 15:32:39,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:32:39,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:32:39,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:32:39,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:32:39,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:32:39,647 INFO L87 Difference]: Start difference. First operand 153 states and 345 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) [2022-03-15 15:32:46,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:32:46,709 INFO L93 Difference]: Finished difference Result 329 states and 651 transitions. [2022-03-15 15:32:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 15:32:46,710 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 19 [2022-03-15 15:32:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:32:46,711 INFO L225 Difference]: With dead ends: 329 [2022-03-15 15:32:46,711 INFO L226 Difference]: Without dead ends: 322 [2022-03-15 15:32:46,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=586, Invalid=3446, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 15:32:46,711 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 237 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 15:32:46,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 194 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 764 Invalid, 0 Unknown, 99 Unchecked, 1.8s Time] [2022-03-15 15:32:46,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-03-15 15:32:46,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 154. [2022-03-15 15:32:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2679738562091503) internal successors, (347), 153 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:32:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 347 transitions. [2022-03-15 15:32:46,714 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 347 transitions. Word has length 19 [2022-03-15 15:32:46,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:32:46,714 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 347 transitions. [2022-03-15 15:32:46,714 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) [2022-03-15 15:32:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 347 transitions. [2022-03-15 15:32:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:32:46,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:32:46,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:32:46,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-15 15:32:46,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-15 15:32:46,915 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:32:46,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:32:46,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1028749228, now seen corresponding path program 94 times [2022-03-15 15:32:46,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:32:46,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951989958] [2022-03-15 15:32:46,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:32:46,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:32:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:32:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:47,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:32:47,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951989958] [2022-03-15 15:32:47,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951989958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:32:47,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467247743] [2022-03-15 15:32:47,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:32:47,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:32:47,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:32:47,338 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:32:47,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 15:32:47,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:32:47,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:32:47,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:32:47,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:32:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:48,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:32:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:50,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467247743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:32:50,831 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:32:50,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:32:50,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893903955] [2022-03-15 15:32:50,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:32:50,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:32:50,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:32:50,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:32:50,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:32:50,833 INFO L87 Difference]: Start difference. First operand 154 states and 347 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) [2022-03-15 15:32:57,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:32:57,578 INFO L93 Difference]: Finished difference Result 323 states and 646 transitions. [2022-03-15 15:32:57,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 15:32:57,578 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 19 [2022-03-15 15:32:57,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:32:57,579 INFO L225 Difference]: With dead ends: 323 [2022-03-15 15:32:57,579 INFO L226 Difference]: Without dead ends: 316 [2022-03-15 15:32:57,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=598, Invalid=3562, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 15:32:57,580 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 217 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:32:57,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 219 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 954 Invalid, 0 Unknown, 110 Unchecked, 2.2s Time] [2022-03-15 15:32:57,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-03-15 15:32:57,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 155. [2022-03-15 15:32:57,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.272727272727273) internal successors, (350), 154 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:32:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 350 transitions. [2022-03-15 15:32:57,582 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 350 transitions. Word has length 19 [2022-03-15 15:32:57,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:32:57,582 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 350 transitions. [2022-03-15 15:32:57,582 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) [2022-03-15 15:32:57,582 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 350 transitions. [2022-03-15 15:32:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:32:57,583 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:32:57,583 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:32:57,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-15 15:32:57,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:32:57,787 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:32:57,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:32:57,788 INFO L85 PathProgramCache]: Analyzing trace with hash -457294422, now seen corresponding path program 95 times [2022-03-15 15:32:57,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:32:57,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139063504] [2022-03-15 15:32:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:32:57,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:32:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:32:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:58,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:32:58,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139063504] [2022-03-15 15:32:58,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139063504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:32:58,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88140118] [2022-03-15 15:32:58,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:32:58,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:32:58,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:32:58,174 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:32:58,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 15:32:58,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:32:58,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:32:58,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:32:58,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:32:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:32:59,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:33:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:00,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88140118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:33:00,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:33:00,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:33:00,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098462837] [2022-03-15 15:33:00,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:33:00,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:33:00,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:33:00,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:33:00,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:33:00,470 INFO L87 Difference]: Start difference. First operand 155 states and 350 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) [2022-03-15 15:33:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:33:05,133 INFO L93 Difference]: Finished difference Result 274 states and 552 transitions. [2022-03-15 15:33:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 15:33:05,133 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 19 [2022-03-15 15:33:05,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:33:05,134 INFO L225 Difference]: With dead ends: 274 [2022-03-15 15:33:05,134 INFO L226 Difference]: Without dead ends: 267 [2022-03-15 15:33:05,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=401, Invalid=2569, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 15:33:05,134 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 133 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:33:05,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 173 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 711 Invalid, 0 Unknown, 78 Unchecked, 1.5s Time] [2022-03-15 15:33:05,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-15 15:33:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 153. [2022-03-15 15:33:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2697368421052633) internal successors, (345), 152 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:33:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 345 transitions. [2022-03-15 15:33:05,137 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 345 transitions. Word has length 19 [2022-03-15 15:33:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:33:05,137 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 345 transitions. [2022-03-15 15:33:05,137 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) [2022-03-15 15:33:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 345 transitions. [2022-03-15 15:33:05,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:33:05,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:33:05,137 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:33:05,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-15 15:33:05,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:33:05,338 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:33:05,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:33:05,338 INFO L85 PathProgramCache]: Analyzing trace with hash 2005845588, now seen corresponding path program 96 times [2022-03-15 15:33:05,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:33:05,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017857827] [2022-03-15 15:33:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:33:05,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:33:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:33:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:05,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:33:05,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017857827] [2022-03-15 15:33:05,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017857827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:33:05,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634539376] [2022-03-15 15:33:05,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:33:05,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:33:05,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:33:05,747 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:33:05,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 15:33:05,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:33:05,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:33:05,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:33:05,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:33:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:06,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:33:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:08,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634539376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:33:08,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:33:08,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:33:08,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039022337] [2022-03-15 15:33:08,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:33:08,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:33:08,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:33:08,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:33:08,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:33:08,093 INFO L87 Difference]: Start difference. First operand 153 states and 345 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) [2022-03-15 15:33:13,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:33:13,915 INFO L93 Difference]: Finished difference Result 291 states and 597 transitions. [2022-03-15 15:33:13,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 15:33:13,916 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 19 [2022-03-15 15:33:13,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:33:13,916 INFO L225 Difference]: With dead ends: 291 [2022-03-15 15:33:13,916 INFO L226 Difference]: Without dead ends: 284 [2022-03-15 15:33:13,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=437, Invalid=2425, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 15:33:13,917 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 147 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:33:13,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 221 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 990 Invalid, 0 Unknown, 82 Unchecked, 2.2s Time] [2022-03-15 15:33:13,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-15 15:33:13,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 152. [2022-03-15 15:33:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2649006622516556) internal successors, (342), 151 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:33:13,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 342 transitions. [2022-03-15 15:33:13,919 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 342 transitions. Word has length 19 [2022-03-15 15:33:13,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:33:13,919 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 342 transitions. [2022-03-15 15:33:13,920 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) [2022-03-15 15:33:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 342 transitions. [2022-03-15 15:33:13,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:33:13,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:33:13,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:33:13,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-15 15:33:14,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-15 15:33:14,121 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:33:14,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:33:14,121 INFO L85 PathProgramCache]: Analyzing trace with hash -142950948, now seen corresponding path program 97 times [2022-03-15 15:33:14,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:33:14,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332411748] [2022-03-15 15:33:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:33:14,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:33:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:33:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:14,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:33:14,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332411748] [2022-03-15 15:33:14,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332411748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:33:14,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646074325] [2022-03-15 15:33:14,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:33:14,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:33:14,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:33:14,578 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:33:14,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 15:33:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:33:14,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:33:14,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:33:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:15,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:33:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:17,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646074325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:33:17,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:33:17,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:33:17,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617224946] [2022-03-15 15:33:17,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:33:17,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:33:17,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:33:17,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:33:17,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:33:17,635 INFO L87 Difference]: Start difference. First operand 152 states and 342 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) [2022-03-15 15:33:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:33:24,136 INFO L93 Difference]: Finished difference Result 320 states and 647 transitions. [2022-03-15 15:33:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 15:33:24,137 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 19 [2022-03-15 15:33:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:33:24,137 INFO L225 Difference]: With dead ends: 320 [2022-03-15 15:33:24,137 INFO L226 Difference]: Without dead ends: 313 [2022-03-15 15:33:24,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=541, Invalid=3119, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 15:33:24,138 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 182 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:33:24,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 200 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 947 Invalid, 0 Unknown, 45 Unchecked, 2.1s Time] [2022-03-15 15:33:24,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-03-15 15:33:24,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 153. [2022-03-15 15:33:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2697368421052633) internal successors, (345), 152 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:33:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 345 transitions. [2022-03-15 15:33:24,140 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 345 transitions. Word has length 19 [2022-03-15 15:33:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:33:24,140 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 345 transitions. [2022-03-15 15:33:24,140 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) [2022-03-15 15:33:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 345 transitions. [2022-03-15 15:33:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:33:24,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:33:24,141 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:33:24,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-15 15:33:24,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 15:33:24,345 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:33:24,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:33:24,345 INFO L85 PathProgramCache]: Analyzing trace with hash 428503858, now seen corresponding path program 98 times [2022-03-15 15:33:24,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:33:24,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572578630] [2022-03-15 15:33:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:33:24,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:33:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:33:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:24,749 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:33:24,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572578630] [2022-03-15 15:33:24,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572578630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:33:24,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575527899] [2022-03-15 15:33:24,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:33:24,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:33:24,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:33:24,751 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:33:24,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 15:33:24,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:33:24,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:33:24,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:33:24,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:33:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:25,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:33:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:27,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575527899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:33:27,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:33:27,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:33:27,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108240728] [2022-03-15 15:33:27,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:33:27,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:33:27,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:33:27,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:33:27,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:33:27,454 INFO L87 Difference]: Start difference. First operand 153 states and 345 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) [2022-03-15 15:33:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:33:31,474 INFO L93 Difference]: Finished difference Result 267 states and 544 transitions. [2022-03-15 15:33:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:33:31,474 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 19 [2022-03-15 15:33:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:33:31,475 INFO L225 Difference]: With dead ends: 267 [2022-03-15 15:33:31,475 INFO L226 Difference]: Without dead ends: 260 [2022-03-15 15:33:31,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=338, Invalid=2112, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 15:33:31,475 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 144 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:33:31,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 156 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 666 Invalid, 0 Unknown, 80 Unchecked, 1.4s Time] [2022-03-15 15:33:31,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-03-15 15:33:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 151. [2022-03-15 15:33:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2666666666666666) internal successors, (340), 150 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:33:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 340 transitions. [2022-03-15 15:33:31,477 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 340 transitions. Word has length 19 [2022-03-15 15:33:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:33:31,478 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 340 transitions. [2022-03-15 15:33:31,487 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) [2022-03-15 15:33:31,487 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 340 transitions. [2022-03-15 15:33:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:33:31,487 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:33:31,487 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:33:31,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-15 15:33:31,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 15:33:31,695 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:33:31,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:33:31,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1252503332, now seen corresponding path program 99 times [2022-03-15 15:33:31,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:33:31,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104254869] [2022-03-15 15:33:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:33:31,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:33:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:33:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:32,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:33:32,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104254869] [2022-03-15 15:33:32,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104254869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:33:32,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580836358] [2022-03-15 15:33:32,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:33:32,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:33:32,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:33:32,118 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:33:32,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 15:33:32,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:33:32,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:33:32,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:33:32,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:33:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:33,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:33:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:34,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580836358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:33:34,824 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:33:34,824 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:33:34,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053153315] [2022-03-15 15:33:34,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:33:34,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:33:34,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:33:34,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:33:34,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:33:34,825 INFO L87 Difference]: Start difference. First operand 151 states and 340 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) [2022-03-15 15:33:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:33:42,507 INFO L93 Difference]: Finished difference Result 338 states and 676 transitions. [2022-03-15 15:33:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 15:33:42,508 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 19 [2022-03-15 15:33:42,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:33:42,508 INFO L225 Difference]: With dead ends: 338 [2022-03-15 15:33:42,509 INFO L226 Difference]: Without dead ends: 331 [2022-03-15 15:33:42,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=551, Invalid=2989, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 15:33:42,509 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 228 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:33:42,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 278 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1087 Invalid, 0 Unknown, 106 Unchecked, 2.5s Time] [2022-03-15 15:33:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-15 15:33:42,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 152. [2022-03-15 15:33:42,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2781456953642385) internal successors, (344), 151 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:33:42,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 344 transitions. [2022-03-15 15:33:42,511 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 344 transitions. Word has length 19 [2022-03-15 15:33:42,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:33:42,511 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 344 transitions. [2022-03-15 15:33:42,511 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) [2022-03-15 15:33:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 344 transitions. [2022-03-15 15:33:42,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:33:42,512 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:33:42,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:33:42,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-15 15:33:42,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:33:42,719 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:33:42,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:33:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1237042536, now seen corresponding path program 100 times [2022-03-15 15:33:42,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:33:42,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114597898] [2022-03-15 15:33:42,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:33:42,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:33:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:33:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:43,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:33:43,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114597898] [2022-03-15 15:33:43,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114597898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:33:43,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157316415] [2022-03-15 15:33:43,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:33:43,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:33:43,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:33:43,133 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:33:43,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 15:33:43,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:33:43,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:33:43,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:33:43,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:33:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:44,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:33:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:45,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157316415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:33:45,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:33:45,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:33:45,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649740037] [2022-03-15 15:33:45,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:33:45,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:33:45,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:33:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:33:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:33:45,802 INFO L87 Difference]: Start difference. First operand 152 states and 344 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) [2022-03-15 15:33:54,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:33:54,322 INFO L93 Difference]: Finished difference Result 348 states and 693 transitions. [2022-03-15 15:33:54,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 15:33:54,322 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 19 [2022-03-15 15:33:54,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:33:54,323 INFO L225 Difference]: With dead ends: 348 [2022-03-15 15:33:54,323 INFO L226 Difference]: Without dead ends: 341 [2022-03-15 15:33:54,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=582, Invalid=3450, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 15:33:54,323 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 205 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:33:54,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 356 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1346 Invalid, 0 Unknown, 113 Unchecked, 3.1s Time] [2022-03-15 15:33:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-03-15 15:33:54,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 153. [2022-03-15 15:33:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2828947368421053) internal successors, (347), 152 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:33:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 347 transitions. [2022-03-15 15:33:54,326 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 347 transitions. Word has length 19 [2022-03-15 15:33:54,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:33:54,326 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 347 transitions. [2022-03-15 15:33:54,326 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) [2022-03-15 15:33:54,326 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 347 transitions. [2022-03-15 15:33:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:33:54,326 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:33:54,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:33:54,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-15 15:33:54,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-15 15:33:54,535 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:33:54,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:33:54,536 INFO L85 PathProgramCache]: Analyzing trace with hash -665587730, now seen corresponding path program 101 times [2022-03-15 15:33:54,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:33:54,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713474798] [2022-03-15 15:33:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:33:54,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:33:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:33:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:54,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:33:54,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713474798] [2022-03-15 15:33:54,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713474798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:33:54,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910161648] [2022-03-15 15:33:54,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:33:54,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:33:54,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:33:54,941 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:33:54,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 15:33:54,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:33:54,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:33:54,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:33:54,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:33:55,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:55,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:33:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:33:57,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910161648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:33:57,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:33:57,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:33:57,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261069406] [2022-03-15 15:33:57,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:33:57,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:33:57,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:33:57,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:33:57,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:33:57,341 INFO L87 Difference]: Start difference. First operand 153 states and 347 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) [2022-03-15 15:34:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:34:03,177 INFO L93 Difference]: Finished difference Result 304 states and 605 transitions. [2022-03-15 15:34:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 15:34:03,178 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 19 [2022-03-15 15:34:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:34:03,178 INFO L225 Difference]: With dead ends: 304 [2022-03-15 15:34:03,178 INFO L226 Difference]: Without dead ends: 297 [2022-03-15 15:34:03,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=443, Invalid=2637, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 15:34:03,179 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 183 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 15:34:03,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 217 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 818 Invalid, 0 Unknown, 48 Unchecked, 1.8s Time] [2022-03-15 15:34:03,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-15 15:34:03,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 152. [2022-03-15 15:34:03,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2781456953642385) internal successors, (344), 151 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:34:03,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 344 transitions. [2022-03-15 15:34:03,181 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 344 transitions. Word has length 19 [2022-03-15 15:34:03,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:34:03,181 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 344 transitions. [2022-03-15 15:34:03,181 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) [2022-03-15 15:34:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 344 transitions. [2022-03-15 15:34:03,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:34:03,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:34:03,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:34:03,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-15 15:34:03,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-15 15:34:03,399 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:34:03,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:34:03,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1203443308, now seen corresponding path program 102 times [2022-03-15 15:34:03,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:34:03,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936137430] [2022-03-15 15:34:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:34:03,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:34:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:34:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:03,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:34:03,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936137430] [2022-03-15 15:34:03,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936137430] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:34:03,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335513653] [2022-03-15 15:34:03,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:34:03,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:34:03,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:34:03,764 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:34:03,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 15:34:03,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:34:03,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:34:03,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:34:03,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:34:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:04,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:34:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:06,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335513653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:34:06,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:34:06,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:34:06,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422117410] [2022-03-15 15:34:06,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:34:06,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:34:06,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:34:06,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:34:06,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:34:06,317 INFO L87 Difference]: Start difference. First operand 152 states and 344 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) [2022-03-15 15:34:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:34:11,838 INFO L93 Difference]: Finished difference Result 291 states and 583 transitions. [2022-03-15 15:34:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 15:34:11,839 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 19 [2022-03-15 15:34:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:34:11,839 INFO L225 Difference]: With dead ends: 291 [2022-03-15 15:34:11,839 INFO L226 Difference]: Without dead ends: 284 [2022-03-15 15:34:11,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=396, Invalid=2360, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 15:34:11,840 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 162 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-15 15:34:11,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 229 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 883 Invalid, 0 Unknown, 47 Unchecked, 2.0s Time] [2022-03-15 15:34:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-15 15:34:11,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 150. [2022-03-15 15:34:11,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.261744966442953) internal successors, (337), 149 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:34:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 337 transitions. [2022-03-15 15:34:11,842 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 337 transitions. Word has length 19 [2022-03-15 15:34:11,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:34:11,842 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 337 transitions. [2022-03-15 15:34:11,842 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) [2022-03-15 15:34:11,842 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 337 transitions. [2022-03-15 15:34:11,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:34:11,842 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:34:11,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:34:11,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-15 15:34:12,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:34:12,051 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:34:12,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:34:12,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1848961976, now seen corresponding path program 103 times [2022-03-15 15:34:12,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:34:12,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313472973] [2022-03-15 15:34:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:34:12,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:34:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:34:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:12,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:34:12,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313472973] [2022-03-15 15:34:12,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313472973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:34:12,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058109596] [2022-03-15 15:34:12,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:34:12,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:34:12,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:34:12,507 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:34:12,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 15:34:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:34:12,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:34:12,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:34:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:13,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:34:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:14,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058109596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:34:14,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:34:14,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:34:14,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931294755] [2022-03-15 15:34:14,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:34:14,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:34:14,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:34:14,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:34:14,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:34:14,938 INFO L87 Difference]: Start difference. First operand 150 states and 337 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) [2022-03-15 15:34:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:34:18,875 INFO L93 Difference]: Finished difference Result 221 states and 458 transitions. [2022-03-15 15:34:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 15:34:18,876 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 19 [2022-03-15 15:34:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:34:18,876 INFO L225 Difference]: With dead ends: 221 [2022-03-15 15:34:18,876 INFO L226 Difference]: Without dead ends: 214 [2022-03-15 15:34:18,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=252, Invalid=1470, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:34:18,877 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 96 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:34:18,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 161 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 627 Invalid, 0 Unknown, 64 Unchecked, 1.5s Time] [2022-03-15 15:34:18,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-03-15 15:34:18,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 151. [2022-03-15 15:34:18,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2666666666666666) internal successors, (340), 150 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:34:18,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 340 transitions. [2022-03-15 15:34:18,879 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 340 transitions. Word has length 19 [2022-03-15 15:34:18,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:34:18,879 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 340 transitions. [2022-03-15 15:34:18,879 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) [2022-03-15 15:34:18,879 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 340 transitions. [2022-03-15 15:34:18,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:34:18,879 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:34:18,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:34:18,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-15 15:34:19,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:34:19,080 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:34:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:34:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash 230331852, now seen corresponding path program 104 times [2022-03-15 15:34:19,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:34:19,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370646648] [2022-03-15 15:34:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:34:19,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:34:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:34:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:19,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:34:19,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370646648] [2022-03-15 15:34:19,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370646648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:34:19,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360115396] [2022-03-15 15:34:19,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:34:19,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:34:19,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:34:19,546 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:34:19,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 15:34:19,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:34:19,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:34:19,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:34:19,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:34:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:20,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:34:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:21,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360115396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:34:21,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:34:21,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:34:21,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527285213] [2022-03-15 15:34:21,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:34:21,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:34:21,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:34:21,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:34:21,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:34:21,990 INFO L87 Difference]: Start difference. First operand 151 states and 340 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) [2022-03-15 15:34:27,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:34:27,409 INFO L93 Difference]: Finished difference Result 258 states and 532 transitions. [2022-03-15 15:34:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 15:34:27,410 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 19 [2022-03-15 15:34:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:34:27,410 INFO L225 Difference]: With dead ends: 258 [2022-03-15 15:34:27,410 INFO L226 Difference]: Without dead ends: 251 [2022-03-15 15:34:27,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=353, Invalid=1903, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 15:34:27,411 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 126 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 15:34:27,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 203 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 874 Invalid, 0 Unknown, 86 Unchecked, 1.9s Time] [2022-03-15 15:34:27,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-15 15:34:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 150. [2022-03-15 15:34:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.261744966442953) internal successors, (337), 149 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:34:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 337 transitions. [2022-03-15 15:34:27,413 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 337 transitions. Word has length 19 [2022-03-15 15:34:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:34:27,413 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 337 transitions. [2022-03-15 15:34:27,413 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) [2022-03-15 15:34:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 337 transitions. [2022-03-15 15:34:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:34:27,413 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:34:27,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:34:27,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-15 15:34:27,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-03-15 15:34:27,621 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:34:27,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:34:27,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1918464684, now seen corresponding path program 105 times [2022-03-15 15:34:27,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:34:27,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811214419] [2022-03-15 15:34:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:34:27,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:34:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:34:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:28,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:34:28,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811214419] [2022-03-15 15:34:28,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811214419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:34:28,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050505983] [2022-03-15 15:34:28,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:34:28,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:34:28,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:34:28,034 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:34:28,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 15:34:28,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 15:34:28,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:34:28,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 15:34:28,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:34:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:28,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:34:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:30,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050505983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:34:30,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:34:30,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:34:30,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40739887] [2022-03-15 15:34:30,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:34:30,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:34:30,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:34:30,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:34:30,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:34:30,353 INFO L87 Difference]: Start difference. First operand 150 states and 337 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) [2022-03-15 15:34:35,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:34:35,845 INFO L93 Difference]: Finished difference Result 261 states and 539 transitions. [2022-03-15 15:34:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 15:34:35,845 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 19 [2022-03-15 15:34:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:34:35,846 INFO L225 Difference]: With dead ends: 261 [2022-03-15 15:34:35,846 INFO L226 Difference]: Without dead ends: 254 [2022-03-15 15:34:35,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=396, Invalid=1956, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 15:34:35,846 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 145 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:34:35,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 189 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 769 Invalid, 0 Unknown, 80 Unchecked, 1.7s Time] [2022-03-15 15:34:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-15 15:34:35,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 147. [2022-03-15 15:34:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.2534246575342465) internal successors, (329), 146 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:34:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 329 transitions. [2022-03-15 15:34:35,848 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 329 transitions. Word has length 19 [2022-03-15 15:34:35,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:34:35,848 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 329 transitions. [2022-03-15 15:34:35,848 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) [2022-03-15 15:34:35,848 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 329 transitions. [2022-03-15 15:34:35,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:34:35,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:34:35,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:34:35,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-15 15:34:36,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:34:36,049 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:34:36,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:34:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash 527545288, now seen corresponding path program 106 times [2022-03-15 15:34:36,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:34:36,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725934743] [2022-03-15 15:34:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:34:36,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:34:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:34:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:36,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:34:36,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725934743] [2022-03-15 15:34:36,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725934743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:34:36,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984591921] [2022-03-15 15:34:36,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:34:36,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:34:36,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:34:36,506 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:34:36,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 15:34:36,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:34:36,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:34:36,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:34:36,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:34:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:37,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:34:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:38,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984591921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:34:38,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:34:38,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:34:38,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077846940] [2022-03-15 15:34:38,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:34:38,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:34:38,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:34:38,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:34:38,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:34:38,425 INFO L87 Difference]: Start difference. First operand 147 states and 329 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) [2022-03-15 15:34:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:34:41,189 INFO L93 Difference]: Finished difference Result 231 states and 481 transitions. [2022-03-15 15:34:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 15:34:41,190 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 19 [2022-03-15 15:34:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:34:41,190 INFO L225 Difference]: With dead ends: 231 [2022-03-15 15:34:41,190 INFO L226 Difference]: Without dead ends: 217 [2022-03-15 15:34:41,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=314, Invalid=1408, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 15:34:41,191 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 97 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:34:41,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 182 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 15:34:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-15 15:34:41,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 148. [2022-03-15 15:34:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.258503401360544) internal successors, (332), 147 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:34:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 332 transitions. [2022-03-15 15:34:41,193 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 332 transitions. Word has length 19 [2022-03-15 15:34:41,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:34:41,193 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 332 transitions. [2022-03-15 15:34:41,193 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) [2022-03-15 15:34:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 332 transitions. [2022-03-15 15:34:41,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:34:41,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:34:41,193 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:34:41,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-15 15:34:41,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-15 15:34:41,394 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:34:41,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:34:41,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1688128180, now seen corresponding path program 107 times [2022-03-15 15:34:41,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:34:41,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949531516] [2022-03-15 15:34:41,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:34:41,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:34:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:34:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:41,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:34:41,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949531516] [2022-03-15 15:34:41,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949531516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:34:41,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507380829] [2022-03-15 15:34:41,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:34:41,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:34:41,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:34:41,824 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:34:41,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-15 15:34:41,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:34:41,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:34:41,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:34:41,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:34:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:42,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:34:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:43,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507380829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:34:43,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:34:43,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 15:34:43,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146588701] [2022-03-15 15:34:43,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:34:43,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 15:34:43,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:34:43,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 15:34:43,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2022-03-15 15:34:43,707 INFO L87 Difference]: Start difference. First operand 148 states and 332 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) [2022-03-15 15:34:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:34:48,276 INFO L93 Difference]: Finished difference Result 304 states and 627 transitions. [2022-03-15 15:34:48,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 15:34:48,276 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 19 [2022-03-15 15:34:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:34:48,277 INFO L225 Difference]: With dead ends: 304 [2022-03-15 15:34:48,277 INFO L226 Difference]: Without dead ends: 290 [2022-03-15 15:34:48,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=525, Invalid=2127, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 15:34:48,278 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 196 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:34:48,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 172 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 15:34:48,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-15 15:34:48,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 147. [2022-03-15 15:34:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.2534246575342465) internal successors, (329), 146 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:34:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 329 transitions. [2022-03-15 15:34:48,280 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 329 transitions. Word has length 19 [2022-03-15 15:34:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:34:48,280 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 329 transitions. [2022-03-15 15:34:48,280 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) [2022-03-15 15:34:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 329 transitions. [2022-03-15 15:34:48,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:34:48,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:34:48,280 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:34:48,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-15 15:34:48,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-15 15:34:48,495 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:34:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:34:48,496 INFO L85 PathProgramCache]: Analyzing trace with hash 278701068, now seen corresponding path program 108 times [2022-03-15 15:34:48,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:34:48,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63611437] [2022-03-15 15:34:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:34:48,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:34:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:34:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:48,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:34:48,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63611437] [2022-03-15 15:34:48,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63611437] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:34:48,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614355016] [2022-03-15 15:34:48,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:34:48,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:34:48,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:34:48,892 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:34:48,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-15 15:34:48,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:34:48,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:34:48,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:34:48,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:34:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:49,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:34:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:50,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614355016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:34:50,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:34:50,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:34:50,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355945611] [2022-03-15 15:34:50,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:34:50,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:34:50,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:34:50,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:34:50,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:34:50,830 INFO L87 Difference]: Start difference. First operand 147 states and 329 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:34:54,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:34:54,561 INFO L93 Difference]: Finished difference Result 272 states and 549 transitions. [2022-03-15 15:34:54,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 15:34:54,561 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:34:54,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:34:54,562 INFO L225 Difference]: With dead ends: 272 [2022-03-15 15:34:54,562 INFO L226 Difference]: Without dead ends: 258 [2022-03-15 15:34:54,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=376, Invalid=1976, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 15:34:54,562 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 137 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:34:54,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 155 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 15:34:54,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-03-15 15:34:54,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 154. [2022-03-15 15:34:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2745098039215685) internal successors, (348), 153 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:34:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2022-03-15 15:34:54,565 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 19 [2022-03-15 15:34:54,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:34:54,565 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2022-03-15 15:34:54,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:34:54,565 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2022-03-15 15:34:54,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:34:54,565 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:34:54,565 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:34:54,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-15 15:34:54,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:34:54,766 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:34:54,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:34:54,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1936972400, now seen corresponding path program 109 times [2022-03-15 15:34:54,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:34:54,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178608607] [2022-03-15 15:34:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:34:54,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:34:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:34:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:55,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:34:55,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178608607] [2022-03-15 15:34:55,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178608607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:34:55,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746963409] [2022-03-15 15:34:55,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:34:55,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:34:55,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:34:55,212 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:34:55,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-15 15:34:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:34:55,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:34:55,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:34:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:56,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:34:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:34:57,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746963409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:34:57,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:34:57,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:34:57,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726120049] [2022-03-15 15:34:57,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:34:57,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:34:57,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:34:57,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:34:57,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:34:57,120 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:35:03,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:35:03,562 INFO L93 Difference]: Finished difference Result 358 states and 720 transitions. [2022-03-15 15:35:03,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 15:35:03,562 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:35:03,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:35:03,563 INFO L225 Difference]: With dead ends: 358 [2022-03-15 15:35:03,563 INFO L226 Difference]: Without dead ends: 344 [2022-03-15 15:35:03,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=664, Invalid=3242, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 15:35:03,564 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 201 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 15:35:03,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 206 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-15 15:35:03,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-03-15 15:35:03,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 153. [2022-03-15 15:35:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2697368421052633) internal successors, (345), 152 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:35:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 345 transitions. [2022-03-15 15:35:03,566 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 345 transitions. Word has length 19 [2022-03-15 15:35:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:35:03,566 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 345 transitions. [2022-03-15 15:35:03,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:35:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 345 transitions. [2022-03-15 15:35:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:35:03,567 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:35:03,567 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:35:03,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-15 15:35:03,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-15 15:35:03,775 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:35:03,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:35:03,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1972294992, now seen corresponding path program 110 times [2022-03-15 15:35:03,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:35:03,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430685039] [2022-03-15 15:35:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:35:03,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:35:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:35:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:35:04,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:35:04,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430685039] [2022-03-15 15:35:04,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430685039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:35:04,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098689152] [2022-03-15 15:35:04,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:35:04,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:35:04,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:35:04,195 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:35:04,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-15 15:35:04,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:35:04,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:35:04,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:35:04,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:35:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:35:05,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:35:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:35:06,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098689152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:35:06,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:35:06,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:35:06,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480192200] [2022-03-15 15:35:06,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:35:06,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:35:06,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:35:06,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:35:06,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:35:06,347 INFO L87 Difference]: Start difference. First operand 153 states and 345 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:35:10,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:35:10,601 INFO L93 Difference]: Finished difference Result 267 states and 553 transitions. [2022-03-15 15:35:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 15:35:10,602 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:35:10,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:35:10,602 INFO L225 Difference]: With dead ends: 267 [2022-03-15 15:35:10,602 INFO L226 Difference]: Without dead ends: 253 [2022-03-15 15:35:10,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=404, Invalid=2046, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 15:35:10,603 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 165 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 15:35:10,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 159 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 15:35:10,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-15 15:35:10,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 158. [2022-03-15 15:35:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.286624203821656) internal successors, (359), 157 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:35:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 359 transitions. [2022-03-15 15:35:10,605 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 359 transitions. Word has length 19 [2022-03-15 15:35:10,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:35:10,605 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 359 transitions. [2022-03-15 15:35:10,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:35:10,605 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 359 transitions. [2022-03-15 15:35:10,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 15:35:10,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:35:10,606 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:35:10,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-15 15:35:10,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-15 15:35:10,815 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:35:10,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:35:10,816 INFO L85 PathProgramCache]: Analyzing trace with hash -243378476, now seen corresponding path program 111 times [2022-03-15 15:35:10,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:35:10,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730384028] [2022-03-15 15:35:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:35:10,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:35:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:35:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:35:11,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:35:11,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730384028] [2022-03-15 15:35:11,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730384028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:35:11,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816192874] [2022-03-15 15:35:11,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:35:11,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:35:11,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:35:11,298 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:35:11,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-15 15:35:11,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:35:11,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:35:11,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 15:35:11,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:35:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:35:12,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:35:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:35:13,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816192874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:35:13,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:35:13,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-03-15 15:35:13,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911598134] [2022-03-15 15:35:13,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:35:13,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 15:35:13,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:35:13,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 15:35:13,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-03-15 15:35:13,275 INFO L87 Difference]: Start difference. First operand 158 states and 359 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:35:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:35:20,881 INFO L93 Difference]: Finished difference Result 358 states and 736 transitions. [2022-03-15 15:35:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 15:35:20,881 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 15:35:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:35:20,882 INFO L225 Difference]: With dead ends: 358 [2022-03-15 15:35:20,882 INFO L226 Difference]: Without dead ends: 344 [2022-03-15 15:35:20,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=770, Invalid=3520, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 15:35:20,882 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 183 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:35:20,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 240 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-15 15:35:20,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-03-15 15:35:20,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 154. [2022-03-15 15:35:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2745098039215685) internal successors, (348), 153 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:35:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 348 transitions. [2022-03-15 15:35:20,885 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 348 transitions. Word has length 19 [2022-03-15 15:35:20,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:35:20,885 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 348 transitions. [2022-03-15 15:35:20,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:35:20,885 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 348 transitions. [2022-03-15 15:35:20,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:35:20,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:35:20,885 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:35:20,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-15 15:35:21,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:35:21,099 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:35:21,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:35:21,100 INFO L85 PathProgramCache]: Analyzing trace with hash 514029778, now seen corresponding path program 112 times [2022-03-15 15:35:21,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:35:21,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597032939] [2022-03-15 15:35:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:35:21,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:35:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:35:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:35:21,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:35:21,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597032939] [2022-03-15 15:35:21,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597032939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:35:21,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992775613] [2022-03-15 15:35:21,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:35:21,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:35:21,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:35:21,581 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:35:21,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-15 15:35:21,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:35:21,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:35:21,601 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:35:21,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:35:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:35:22,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:35:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:35:23,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992775613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:35:23,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:35:23,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:35:23,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486968217] [2022-03-15 15:35:23,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:35:23,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:35:23,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:35:23,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:35:23,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:35:23,956 INFO L87 Difference]: Start difference. First operand 154 states and 348 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:35:33,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:35:33,794 INFO L93 Difference]: Finished difference Result 301 states and 616 transitions. [2022-03-15 15:35:33,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 15:35:33,795 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:35:33,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:35:33,796 INFO L225 Difference]: With dead ends: 301 [2022-03-15 15:35:33,796 INFO L226 Difference]: Without dead ends: 287 [2022-03-15 15:35:33,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=760, Invalid=3796, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 15:35:33,796 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 185 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 15:35:33,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 171 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-15 15:35:33,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-15 15:35:33,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 163. [2022-03-15 15:35:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.2901234567901234) internal successors, (371), 162 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:35:33,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 371 transitions. [2022-03-15 15:35:33,798 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 371 transitions. Word has length 21 [2022-03-15 15:35:33,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:35:33,799 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 371 transitions. [2022-03-15 15:35:33,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:35:33,799 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 371 transitions. [2022-03-15 15:35:33,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:35:33,799 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:35:33,799 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:35:33,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-15 15:35:34,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:35:34,007 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:35:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:35:34,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1701643690, now seen corresponding path program 113 times [2022-03-15 15:35:34,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:35:34,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492106513] [2022-03-15 15:35:34,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:35:34,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:35:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:35:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:35:34,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:35:34,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492106513] [2022-03-15 15:35:34,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492106513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:35:34,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629485221] [2022-03-15 15:35:34,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:35:34,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:35:34,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:35:34,521 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:35:34,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-15 15:35:34,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 15:35:34,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:35:34,541 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:35:34,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:35:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:35:35,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:35:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:35:36,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629485221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:35:36,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:35:36,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:35:36,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550828922] [2022-03-15 15:35:36,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:35:36,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:35:36,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:35:36,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:35:36,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:35:36,804 INFO L87 Difference]: Start difference. First operand 163 states and 371 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:35:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:35:49,908 INFO L93 Difference]: Finished difference Result 369 states and 742 transitions. [2022-03-15 15:35:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 15:35:49,909 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:35:49,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:35:49,909 INFO L225 Difference]: With dead ends: 369 [2022-03-15 15:35:49,909 INFO L226 Difference]: Without dead ends: 355 [2022-03-15 15:35:49,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1015, Invalid=4837, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 15:35:49,910 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 235 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:35:49,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 271 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-15 15:35:49,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-03-15 15:35:49,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 160. [2022-03-15 15:35:49,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2830188679245285) internal successors, (363), 159 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:35:49,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 363 transitions. [2022-03-15 15:35:49,912 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 363 transitions. Word has length 21 [2022-03-15 15:35:49,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:35:49,912 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 363 transitions. [2022-03-15 15:35:49,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:35:49,912 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 363 transitions. [2022-03-15 15:35:49,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:35:49,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:35:49,913 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:35:49,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-15 15:35:50,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-03-15 15:35:50,113 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:35:50,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:35:50,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1686182894, now seen corresponding path program 114 times [2022-03-15 15:35:50,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:35:50,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730497529] [2022-03-15 15:35:50,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:35:50,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:35:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:35:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:35:50,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:35:50,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730497529] [2022-03-15 15:35:50,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730497529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:35:50,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77029345] [2022-03-15 15:35:50,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:35:50,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:35:50,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:35:50,644 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:35:50,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-15 15:35:50,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:35:50,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:35:50,668 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:35:50,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:35:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:35:51,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:35:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:35:52,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77029345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:35:52,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:35:52,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:35:52,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239540219] [2022-03-15 15:35:52,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:35:52,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:35:52,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:35:52,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:35:52,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:35:52,925 INFO L87 Difference]: Start difference. First operand 160 states and 363 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:36:04,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:36:04,065 INFO L93 Difference]: Finished difference Result 394 states and 800 transitions. [2022-03-15 15:36:04,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 15:36:04,065 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 21 [2022-03-15 15:36:04,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:36:04,066 INFO L225 Difference]: With dead ends: 394 [2022-03-15 15:36:04,066 INFO L226 Difference]: Without dead ends: 380 [2022-03-15 15:36:04,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=838, Invalid=3992, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 15:36:04,066 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 199 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-15 15:36:04,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 275 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-15 15:36:04,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-15 15:36:04,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 165. [2022-03-15 15:36:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.292682926829268) internal successors, (376), 164 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:36:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 376 transitions. [2022-03-15 15:36:04,069 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 376 transitions. Word has length 21 [2022-03-15 15:36:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:36:04,069 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 376 transitions. [2022-03-15 15:36:04,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:36:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 376 transitions. [2022-03-15 15:36:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:36:04,069 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:36:04,069 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:36:04,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-15 15:36:04,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-03-15 15:36:04,283 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:36:04,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:36:04,284 INFO L85 PathProgramCache]: Analyzing trace with hash 444527070, now seen corresponding path program 115 times [2022-03-15 15:36:04,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:36:04,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056546771] [2022-03-15 15:36:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:36:04,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:36:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:36:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:36:04,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:36:04,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056546771] [2022-03-15 15:36:04,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056546771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:36:04,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254629353] [2022-03-15 15:36:04,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:36:04,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:36:04,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:36:04,813 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:36:04,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-15 15:36:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:36:04,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:36:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:36:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:36:06,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:36:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:36:07,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254629353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:36:07,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:36:07,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:36:07,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582778585] [2022-03-15 15:36:07,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:36:07,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:36:07,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:36:07,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:36:07,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:36:07,269 INFO L87 Difference]: Start difference. First operand 165 states and 376 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:36:19,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:36:19,041 INFO L93 Difference]: Finished difference Result 394 states and 794 transitions. [2022-03-15 15:36:19,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 15:36:19,041 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:36:19,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:36:19,042 INFO L225 Difference]: With dead ends: 394 [2022-03-15 15:36:19,042 INFO L226 Difference]: Without dead ends: 380 [2022-03-15 15:36:19,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=907, Invalid=4205, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 15:36:19,043 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 211 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-15 15:36:19,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 244 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-15 15:36:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-15 15:36:19,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 168. [2022-03-15 15:36:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2994011976047903) internal successors, (384), 167 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:36:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 384 transitions. [2022-03-15 15:36:19,045 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 384 transitions. Word has length 21 [2022-03-15 15:36:19,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:36:19,045 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 384 transitions. [2022-03-15 15:36:19,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:36:19,045 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 384 transitions. [2022-03-15 15:36:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:36:19,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:36:19,046 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:36:19,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-15 15:36:19,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:36:19,246 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:36:19,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:36:19,246 INFO L85 PathProgramCache]: Analyzing trace with hash 459987866, now seen corresponding path program 116 times [2022-03-15 15:36:19,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:36:19,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783888104] [2022-03-15 15:36:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:36:19,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:36:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:36:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:36:19,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:36:19,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783888104] [2022-03-15 15:36:19,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783888104] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:36:19,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986821481] [2022-03-15 15:36:19,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:36:19,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:36:19,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:36:19,779 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:36:19,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-15 15:36:19,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:36:19,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:36:19,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:36:19,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:36:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:36:21,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:36:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:36:22,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986821481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:36:22,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:36:22,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:36:22,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939299224] [2022-03-15 15:36:22,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:36:22,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:36:22,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:36:22,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:36:22,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:36:22,231 INFO L87 Difference]: Start difference. First operand 168 states and 384 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:36:35,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:36:35,853 INFO L93 Difference]: Finished difference Result 445 states and 902 transitions. [2022-03-15 15:36:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 15:36:35,853 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 21 [2022-03-15 15:36:35,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:36:35,854 INFO L225 Difference]: With dead ends: 445 [2022-03-15 15:36:35,854 INFO L226 Difference]: Without dead ends: 431 [2022-03-15 15:36:35,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=1178, Invalid=5794, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 15:36:35,855 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 213 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:36:35,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 250 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-15 15:36:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-03-15 15:36:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 170. [2022-03-15 15:36:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.301775147928994) internal successors, (389), 169 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:36:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 389 transitions. [2022-03-15 15:36:35,858 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 389 transitions. Word has length 21 [2022-03-15 15:36:35,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:36:35,858 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 389 transitions. [2022-03-15 15:36:35,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:36:35,858 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 389 transitions. [2022-03-15 15:36:35,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:36:35,858 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:36:35,858 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:36:35,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-15 15:36:36,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:36:36,059 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:36:36,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:36:36,059 INFO L85 PathProgramCache]: Analyzing trace with hash -353905758, now seen corresponding path program 117 times [2022-03-15 15:36:36,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:36:36,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404711671] [2022-03-15 15:36:36,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:36:36,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:36:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:36:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:36:36,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:36:36,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404711671] [2022-03-15 15:36:36,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404711671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:36:36,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181432879] [2022-03-15 15:36:36,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:36:36,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:36:36,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:36:36,625 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:36:36,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-15 15:36:36,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:36:36,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:36:36,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:36:36,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:36:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:36:37,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:36:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:36:42,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181432879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:36:42,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:36:42,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:36:42,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059019846] [2022-03-15 15:36:42,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:36:42,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:36:42,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:36:42,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:36:42,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=750, Unknown=1, NotChecked=0, Total=870 [2022-03-15 15:36:42,029 INFO L87 Difference]: Start difference. First operand 170 states and 389 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:36:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:36:50,622 INFO L93 Difference]: Finished difference Result 315 states and 641 transitions. [2022-03-15 15:36:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 15:36:50,622 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:36:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:36:50,623 INFO L225 Difference]: With dead ends: 315 [2022-03-15 15:36:50,623 INFO L226 Difference]: Without dead ends: 272 [2022-03-15 15:36:50,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=698, Invalid=4271, Unknown=1, NotChecked=0, Total=4970 [2022-03-15 15:36:50,624 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 232 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-15 15:36:50,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 221 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 927 Invalid, 0 Unknown, 42 Unchecked, 2.1s Time] [2022-03-15 15:36:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-15 15:36:50,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 183. [2022-03-15 15:36:50,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2857142857142856) internal successors, (416), 182 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:36:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 416 transitions. [2022-03-15 15:36:50,626 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 416 transitions. Word has length 21 [2022-03-15 15:36:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:36:50,626 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 416 transitions. [2022-03-15 15:36:50,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:36:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 416 transitions. [2022-03-15 15:36:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:36:50,626 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:36:50,626 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:36:50,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-15 15:36:50,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:36:50,827 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:36:50,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:36:50,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1399828058, now seen corresponding path program 118 times [2022-03-15 15:36:50,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:36:50,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494075359] [2022-03-15 15:36:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:36:50,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:36:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:36:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:36:51,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:36:51,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494075359] [2022-03-15 15:36:51,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494075359] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:36:51,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842687238] [2022-03-15 15:36:51,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:36:51,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:36:51,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:36:51,385 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:36:51,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-15 15:36:51,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:36:51,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:36:51,403 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:36:51,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:36:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:36:52,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:36:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:36:53,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842687238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:36:53,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:36:53,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:36:53,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784827256] [2022-03-15 15:36:53,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:36:53,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:36:53,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:36:53,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:36:53,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:36:53,810 INFO L87 Difference]: Start difference. First operand 183 states and 416 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:37:01,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:37:01,131 INFO L93 Difference]: Finished difference Result 290 states and 607 transitions. [2022-03-15 15:37:01,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 15:37:01,132 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:37:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:37:01,132 INFO L225 Difference]: With dead ends: 290 [2022-03-15 15:37:01,132 INFO L226 Difference]: Without dead ends: 276 [2022-03-15 15:37:01,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=663, Invalid=3119, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 15:37:01,133 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:37:01,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 197 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-15 15:37:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-03-15 15:37:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 191. [2022-03-15 15:37:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.305263157894737) internal successors, (438), 190 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:37:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 438 transitions. [2022-03-15 15:37:01,135 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 438 transitions. Word has length 21 [2022-03-15 15:37:01,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:37:01,135 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 438 transitions. [2022-03-15 15:37:01,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:37:01,135 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 438 transitions. [2022-03-15 15:37:01,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:37:01,135 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:37:01,136 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:37:01,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-15 15:37:01,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-15 15:37:01,336 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:37:01,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:37:01,336 INFO L85 PathProgramCache]: Analyzing trace with hash -815845410, now seen corresponding path program 119 times [2022-03-15 15:37:01,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:37:01,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780397838] [2022-03-15 15:37:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:37:01,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:37:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:37:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:37:01,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:37:01,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780397838] [2022-03-15 15:37:01,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780397838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:37:01,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563482556] [2022-03-15 15:37:01,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:37:01,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:37:01,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:37:01,886 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:37:01,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-15 15:37:01,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 15:37:01,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:37:01,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:37:01,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:37:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:37:02,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:37:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:37:04,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563482556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:37:04,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:37:04,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:37:04,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273468993] [2022-03-15 15:37:04,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:37:04,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:37:04,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:37:04,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:37:04,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:37:04,133 INFO L87 Difference]: Start difference. First operand 191 states and 438 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:37:14,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:37:14,180 INFO L93 Difference]: Finished difference Result 396 states and 818 transitions. [2022-03-15 15:37:14,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 15:37:14,180 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:37:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:37:14,181 INFO L225 Difference]: With dead ends: 396 [2022-03-15 15:37:14,181 INFO L226 Difference]: Without dead ends: 382 [2022-03-15 15:37:14,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1047, Invalid=4503, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 15:37:14,182 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 200 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:37:14,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 230 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-15 15:37:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-03-15 15:37:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 190. [2022-03-15 15:37:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.3015873015873014) internal successors, (435), 189 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:37:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 435 transitions. [2022-03-15 15:37:14,184 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 435 transitions. Word has length 21 [2022-03-15 15:37:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:37:14,185 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 435 transitions. [2022-03-15 15:37:14,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:37:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 435 transitions. [2022-03-15 15:37:14,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:37:14,185 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:37:14,185 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:37:14,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-15 15:37:14,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-15 15:37:14,391 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:37:14,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:37:14,391 INFO L85 PathProgramCache]: Analyzing trace with hash -800384614, now seen corresponding path program 120 times [2022-03-15 15:37:14,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:37:14,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319008293] [2022-03-15 15:37:14,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:37:14,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:37:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:37:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:37:14,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:37:14,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319008293] [2022-03-15 15:37:14,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319008293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:37:14,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878595894] [2022-03-15 15:37:14,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:37:14,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:37:14,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:37:14,891 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:37:14,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-15 15:37:14,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 15:37:14,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:37:14,914 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:37:14,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:37:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:37:16,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:37:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:37:17,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878595894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:37:17,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:37:17,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:37:17,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569520962] [2022-03-15 15:37:17,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:37:17,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:37:17,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:37:17,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:37:17,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:37:17,153 INFO L87 Difference]: Start difference. First operand 190 states and 435 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:37:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:37:24,854 INFO L93 Difference]: Finished difference Result 367 states and 764 transitions. [2022-03-15 15:37:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 15:37:24,855 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 21 [2022-03-15 15:37:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:37:24,855 INFO L225 Difference]: With dead ends: 367 [2022-03-15 15:37:24,855 INFO L226 Difference]: Without dead ends: 353 [2022-03-15 15:37:24,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=665, Invalid=3117, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 15:37:24,856 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 158 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:37:24,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 255 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-15 15:37:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-03-15 15:37:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 179. [2022-03-15 15:37:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.297752808988764) internal successors, (409), 178 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:37:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 409 transitions. [2022-03-15 15:37:24,859 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 409 transitions. Word has length 21 [2022-03-15 15:37:24,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:37:24,859 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 409 transitions. [2022-03-15 15:37:24,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:37:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 409 transitions. [2022-03-15 15:37:24,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:37:24,859 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:37:24,859 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:37:24,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-15 15:37:25,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-15 15:37:25,060 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:37:25,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:37:25,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1330325350, now seen corresponding path program 121 times [2022-03-15 15:37:25,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:37:25,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550424004] [2022-03-15 15:37:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:37:25,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:37:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:37:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:37:25,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:37:25,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550424004] [2022-03-15 15:37:25,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550424004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:37:25,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301043132] [2022-03-15 15:37:25,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:37:25,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:37:25,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:37:25,558 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:37:25,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-15 15:37:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:37:25,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:37:25,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:37:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:37:26,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:37:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:37:27,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301043132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:37:27,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:37:27,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:37:27,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554404453] [2022-03-15 15:37:27,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:37:27,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:37:27,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:37:27,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:37:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:37:27,943 INFO L87 Difference]: Start difference. First operand 179 states and 409 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:37:37,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:37:37,308 INFO L93 Difference]: Finished difference Result 376 states and 776 transitions. [2022-03-15 15:37:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 15:37:37,308 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:37:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:37:37,309 INFO L225 Difference]: With dead ends: 376 [2022-03-15 15:37:37,309 INFO L226 Difference]: Without dead ends: 362 [2022-03-15 15:37:37,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=859, Invalid=3833, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 15:37:37,310 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 200 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:37:37,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 231 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-15 15:37:37,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-15 15:37:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 182. [2022-03-15 15:37:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.303867403314917) internal successors, (417), 181 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) [2022-03-15 15:37:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 417 transitions. [2022-03-15 15:37:37,312 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 417 transitions. Word has length 21 [2022-03-15 15:37:37,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:37:37,312 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 417 transitions. [2022-03-15 15:37:37,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:37:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 417 transitions. [2022-03-15 15:37:37,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:37:37,313 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:37:37,313 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:37:37,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-15 15:37:37,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:37:37,513 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:37:37,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:37:37,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1345786146, now seen corresponding path program 122 times [2022-03-15 15:37:37,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:37:37,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801466167] [2022-03-15 15:37:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:37:37,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:37:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:37:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:37:38,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:37:38,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801466167] [2022-03-15 15:37:38,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801466167] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:37:38,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635536237] [2022-03-15 15:37:38,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:37:38,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:37:38,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:37:38,050 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:37:38,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-15 15:37:38,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:37:38,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:37:38,071 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:37:38,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:37:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:37:39,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:37:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:37:40,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635536237] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:37:40,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:37:40,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:37:40,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111693249] [2022-03-15 15:37:40,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:37:40,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:37:40,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:37:40,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:37:40,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:37:40,357 INFO L87 Difference]: Start difference. First operand 182 states and 417 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:37:49,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:37:49,865 INFO L93 Difference]: Finished difference Result 398 states and 818 transitions. [2022-03-15 15:37:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 15:37:49,866 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 21 [2022-03-15 15:37:49,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:37:49,867 INFO L225 Difference]: With dead ends: 398 [2022-03-15 15:37:49,867 INFO L226 Difference]: Without dead ends: 384 [2022-03-15 15:37:49,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=887, Invalid=4225, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 15:37:49,867 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 156 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:37:49,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 256 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-15 15:37:49,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-03-15 15:37:49,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 179. [2022-03-15 15:37:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.297752808988764) internal successors, (409), 178 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:37:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 409 transitions. [2022-03-15 15:37:49,870 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 409 transitions. Word has length 21 [2022-03-15 15:37:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:37:49,870 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 409 transitions. [2022-03-15 15:37:49,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:37:49,870 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 409 transitions. [2022-03-15 15:37:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:37:49,870 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:37:49,871 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:37:49,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-15 15:37:50,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:37:50,072 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:37:50,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:37:50,072 INFO L85 PathProgramCache]: Analyzing trace with hash 236233762, now seen corresponding path program 123 times [2022-03-15 15:37:50,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:37:50,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338538062] [2022-03-15 15:37:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:37:50,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:37:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:37:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:37:50,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:37:50,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338538062] [2022-03-15 15:37:50,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338538062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:37:50,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946282344] [2022-03-15 15:37:50,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:37:50,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:37:50,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:37:50,557 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:37:50,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-15 15:37:50,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 15:37:50,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:37:50,580 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:37:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:37:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:37:51,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:37:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:37:52,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946282344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:37:52,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:37:52,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:37:52,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708289801] [2022-03-15 15:37:52,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:37:52,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:37:52,934 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:37:52,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:37:52,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:37:52,935 INFO L87 Difference]: Start difference. First operand 179 states and 409 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:38:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:38:04,483 INFO L93 Difference]: Finished difference Result 432 states and 878 transitions. [2022-03-15 15:38:04,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 15:38:04,484 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:38:04,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:38:04,484 INFO L225 Difference]: With dead ends: 432 [2022-03-15 15:38:04,484 INFO L226 Difference]: Without dead ends: 418 [2022-03-15 15:38:04,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=998, Invalid=5322, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 15:38:04,485 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 276 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-15 15:38:04,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 255 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1450 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-15 15:38:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-03-15 15:38:04,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 185. [2022-03-15 15:38:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.342391304347826) internal successors, (431), 184 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:38:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 431 transitions. [2022-03-15 15:38:04,488 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 431 transitions. Word has length 21 [2022-03-15 15:38:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:38:04,488 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 431 transitions. [2022-03-15 15:38:04,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:38:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 431 transitions. [2022-03-15 15:38:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:38:04,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:38:04,489 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:38:04,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-15 15:38:04,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-15 15:38:04,699 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:38:04,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:38:04,700 INFO L85 PathProgramCache]: Analyzing trace with hash 251694558, now seen corresponding path program 124 times [2022-03-15 15:38:04,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:38:04,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27001115] [2022-03-15 15:38:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:38:04,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:38:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:38:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:38:05,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:38:05,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27001115] [2022-03-15 15:38:05,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27001115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:38:05,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374501879] [2022-03-15 15:38:05,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:38:05,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:38:05,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:38:05,116 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:38:05,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-15 15:38:05,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:38:05,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:38:05,156 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:38:05,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:38:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:38:06,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:38:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:38:07,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374501879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:38:07,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:38:07,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:38:07,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522423196] [2022-03-15 15:38:07,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:38:07,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:38:07,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:38:07,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:38:07,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:38:07,335 INFO L87 Difference]: Start difference. First operand 185 states and 431 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:38:21,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:38:21,207 INFO L93 Difference]: Finished difference Result 478 states and 964 transitions. [2022-03-15 15:38:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 15:38:21,207 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 21 [2022-03-15 15:38:21,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:38:21,208 INFO L225 Difference]: With dead ends: 478 [2022-03-15 15:38:21,208 INFO L226 Difference]: Without dead ends: 464 [2022-03-15 15:38:21,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2595 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1389, Invalid=6983, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 15:38:21,209 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 211 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:38:21,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 354 Invalid, 1875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1796 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-15 15:38:21,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-03-15 15:38:21,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 183. [2022-03-15 15:38:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.32967032967033) internal successors, (424), 182 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:38:21,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 424 transitions. [2022-03-15 15:38:21,212 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 424 transitions. Word has length 21 [2022-03-15 15:38:21,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:38:21,213 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 424 transitions. [2022-03-15 15:38:21,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:38:21,213 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 424 transitions. [2022-03-15 15:38:21,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:38:21,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:38:21,213 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:38:21,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-15 15:38:21,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-15 15:38:21,418 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:38:21,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:38:21,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2034402398, now seen corresponding path program 125 times [2022-03-15 15:38:21,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:38:21,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098044621] [2022-03-15 15:38:21,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:38:21,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:38:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:38:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:38:21,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:38:21,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098044621] [2022-03-15 15:38:21,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098044621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:38:21,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828207340] [2022-03-15 15:38:21,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:38:21,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:38:21,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:38:21,940 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:38:21,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-15 15:38:21,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 15:38:21,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:38:21,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:38:21,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:38:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:38:23,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:38:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:38:27,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828207340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:38:27,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:38:27,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:38:27,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584861777] [2022-03-15 15:38:27,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:38:27,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:38:27,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:38:27,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:38:27,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:38:27,686 INFO L87 Difference]: Start difference. First operand 183 states and 424 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:38:38,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:38:38,263 INFO L93 Difference]: Finished difference Result 388 states and 787 transitions. [2022-03-15 15:38:38,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 15:38:38,263 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:38:38,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:38:38,264 INFO L225 Difference]: With dead ends: 388 [2022-03-15 15:38:38,264 INFO L226 Difference]: Without dead ends: 353 [2022-03-15 15:38:38,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=880, Invalid=4972, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 15:38:38,264 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 246 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-15 15:38:38,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 243 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1065 Invalid, 0 Unknown, 102 Unchecked, 2.2s Time] [2022-03-15 15:38:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-03-15 15:38:38,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 190. [2022-03-15 15:38:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.375661375661376) internal successors, (449), 189 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) [2022-03-15 15:38:38,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 449 transitions. [2022-03-15 15:38:38,267 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 449 transitions. Word has length 21 [2022-03-15 15:38:38,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:38:38,267 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 449 transitions. [2022-03-15 15:38:38,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:38:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 449 transitions. [2022-03-15 15:38:38,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:38:38,268 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:38:38,268 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:38:38,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-15 15:38:38,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:38:38,468 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:38:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:38:38,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1877844510, now seen corresponding path program 126 times [2022-03-15 15:38:38,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:38:38,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711207155] [2022-03-15 15:38:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:38:38,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:38:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:38:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:38:38,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:38:38,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711207155] [2022-03-15 15:38:38,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711207155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:38:38,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179946075] [2022-03-15 15:38:38,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:38:38,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:38:38,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:38:38,939 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:38:38,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-15 15:38:38,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:38:38,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:38:38,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:38:38,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:38:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:38:40,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:38:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:38:44,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179946075] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:38:44,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:38:44,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:38:44,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428675984] [2022-03-15 15:38:44,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:38:44,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:38:44,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:38:44,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:38:44,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:38:44,632 INFO L87 Difference]: Start difference. First operand 190 states and 449 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:38:55,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:38:55,068 INFO L93 Difference]: Finished difference Result 361 states and 751 transitions. [2022-03-15 15:38:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 15:38:55,068 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:38:55,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:38:55,069 INFO L225 Difference]: With dead ends: 361 [2022-03-15 15:38:55,069 INFO L226 Difference]: Without dead ends: 347 [2022-03-15 15:38:55,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=836, Invalid=4420, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 15:38:55,070 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 218 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:38:55,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 245 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1172 Invalid, 0 Unknown, 88 Unchecked, 2.5s Time] [2022-03-15 15:38:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-15 15:38:55,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 191. [2022-03-15 15:38:55,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.3789473684210525) internal successors, (452), 190 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:38:55,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 452 transitions. [2022-03-15 15:38:55,072 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 452 transitions. Word has length 21 [2022-03-15 15:38:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:38:55,072 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 452 transitions. [2022-03-15 15:38:55,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:38:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 452 transitions. [2022-03-15 15:38:55,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:38:55,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:38:55,073 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:38:55,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-15 15:38:55,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:38:55,279 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:38:55,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:38:55,279 INFO L85 PathProgramCache]: Analyzing trace with hash -337828958, now seen corresponding path program 127 times [2022-03-15 15:38:55,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:38:55,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285099056] [2022-03-15 15:38:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:38:55,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:38:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:38:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:38:55,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:38:55,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285099056] [2022-03-15 15:38:55,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285099056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:38:55,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058668322] [2022-03-15 15:38:55,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:38:55,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:38:55,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:38:55,786 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:38:55,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-15 15:38:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:38:55,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:38:55,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:38:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:38:57,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:39:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:39:02,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058668322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:39:02,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:39:02,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:39:02,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989282426] [2022-03-15 15:39:02,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:39:02,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:39:02,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:39:02,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:39:02,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:39:02,607 INFO L87 Difference]: Start difference. First operand 191 states and 452 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:39:19,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:39:19,210 INFO L93 Difference]: Finished difference Result 445 states and 899 transitions. [2022-03-15 15:39:19,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 15:39:19,210 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:39:19,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:39:19,211 INFO L225 Difference]: With dead ends: 445 [2022-03-15 15:39:19,211 INFO L226 Difference]: Without dead ends: 431 [2022-03-15 15:39:19,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=1326, Invalid=7046, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 15:39:19,212 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 301 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-15 15:39:19,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 280 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1231 Invalid, 0 Unknown, 64 Unchecked, 2.8s Time] [2022-03-15 15:39:19,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-03-15 15:39:19,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 191. [2022-03-15 15:39:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.3842105263157896) internal successors, (453), 190 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:39:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 453 transitions. [2022-03-15 15:39:19,214 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 453 transitions. Word has length 21 [2022-03-15 15:39:19,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:39:19,215 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 453 transitions. [2022-03-15 15:39:19,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:39:19,215 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 453 transitions. [2022-03-15 15:39:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:39:19,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:39:19,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:39:19,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-15 15:39:19,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-03-15 15:39:19,418 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:39:19,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:39:19,418 INFO L85 PathProgramCache]: Analyzing trace with hash -322368162, now seen corresponding path program 128 times [2022-03-15 15:39:19,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:39:19,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144064731] [2022-03-15 15:39:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:39:19,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:39:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:39:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:39:19,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:39:19,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144064731] [2022-03-15 15:39:19,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144064731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:39:19,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158801081] [2022-03-15 15:39:19,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:39:19,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:39:19,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:39:19,904 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:39:19,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-15 15:39:19,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:39:19,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:39:19,928 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:39:19,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:39:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:39:23,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:39:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:39:26,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158801081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:39:26,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:39:26,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:39:26,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028363317] [2022-03-15 15:39:26,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:39:26,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:39:26,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:39:26,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:39:26,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:39:26,443 INFO L87 Difference]: Start difference. First operand 191 states and 453 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:39:42,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:39:42,220 INFO L93 Difference]: Finished difference Result 418 states and 878 transitions. [2022-03-15 15:39:42,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 15:39:42,220 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 21 [2022-03-15 15:39:42,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:39:42,221 INFO L225 Difference]: With dead ends: 418 [2022-03-15 15:39:42,221 INFO L226 Difference]: Without dead ends: 404 [2022-03-15 15:39:42,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=1101, Invalid=5541, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 15:39:42,221 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 256 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 15:39:42,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 204 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 890 Invalid, 0 Unknown, 184 Unchecked, 1.9s Time] [2022-03-15 15:39:42,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-03-15 15:39:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 194. [2022-03-15 15:39:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.38860103626943) internal successors, (461), 193 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:39:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 461 transitions. [2022-03-15 15:39:42,224 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 461 transitions. Word has length 21 [2022-03-15 15:39:42,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:39:42,224 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 461 transitions. [2022-03-15 15:39:42,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:39:42,225 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 461 transitions. [2022-03-15 15:39:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:39:42,225 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:39:42,225 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:39:42,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-15 15:39:42,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-15 15:39:42,436 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:39:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:39:42,436 INFO L85 PathProgramCache]: Analyzing trace with hash 285293786, now seen corresponding path program 129 times [2022-03-15 15:39:42,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:39:42,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619524282] [2022-03-15 15:39:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:39:42,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:39:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:39:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:39:42,893 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:39:42,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619524282] [2022-03-15 15:39:42,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619524282] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:39:42,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33821099] [2022-03-15 15:39:42,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:39:42,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:39:42,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:39:42,894 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:39:42,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-15 15:39:42,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 15:39:42,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:39:42,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:39:42,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:39:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:39:43,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:39:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:39:45,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33821099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:39:45,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:39:45,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:39:45,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057329587] [2022-03-15 15:39:45,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:39:45,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:39:45,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:39:45,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:39:45,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:39:45,109 INFO L87 Difference]: Start difference. First operand 194 states and 461 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:39:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:39:53,420 INFO L93 Difference]: Finished difference Result 369 states and 771 transitions. [2022-03-15 15:39:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 15:39:53,420 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 21 [2022-03-15 15:39:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:39:53,421 INFO L225 Difference]: With dead ends: 369 [2022-03-15 15:39:53,421 INFO L226 Difference]: Without dead ends: 355 [2022-03-15 15:39:53,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=636, Invalid=3654, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 15:39:53,422 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 173 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:39:53,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 233 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-15 15:39:53,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-03-15 15:39:53,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 197. [2022-03-15 15:39:53,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.392857142857143) internal successors, (469), 196 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:39:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 469 transitions. [2022-03-15 15:39:53,424 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 469 transitions. Word has length 21 [2022-03-15 15:39:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:39:53,424 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 469 transitions. [2022-03-15 15:39:53,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:39:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 469 transitions. [2022-03-15 15:39:53,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:39:53,425 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:39:53,425 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:39:53,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-15 15:39:53,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-15 15:39:53,635 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:39:53,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:39:53,636 INFO L85 PathProgramCache]: Analyzing trace with hash -638020898, now seen corresponding path program 130 times [2022-03-15 15:39:53,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:39:53,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056532439] [2022-03-15 15:39:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:39:53,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:39:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:39:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:39:54,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:39:54,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056532439] [2022-03-15 15:39:54,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056532439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:39:54,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148041530] [2022-03-15 15:39:54,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 15:39:54,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:39:54,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:39:54,131 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:39:54,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-15 15:39:54,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 15:39:54,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:39:54,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:39:54,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:39:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:39:55,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:39:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:39:56,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148041530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:39:56,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:39:56,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:39:56,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193992267] [2022-03-15 15:39:56,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:39:56,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:39:56,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:39:56,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:39:56,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:39:56,374 INFO L87 Difference]: Start difference. First operand 197 states and 469 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:40:16,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:40:16,766 INFO L93 Difference]: Finished difference Result 572 states and 1148 transitions. [2022-03-15 15:40:16,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-15 15:40:16,766 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:40:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:40:16,767 INFO L225 Difference]: With dead ends: 572 [2022-03-15 15:40:16,767 INFO L226 Difference]: Without dead ends: 558 [2022-03-15 15:40:16,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5568 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=2518, Invalid=13232, Unknown=0, NotChecked=0, Total=15750 [2022-03-15 15:40:16,769 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 296 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 2089 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:40:16,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 457 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2089 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-15 15:40:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-03-15 15:40:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 210. [2022-03-15 15:40:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.464114832535885) internal successors, (515), 209 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:40:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 515 transitions. [2022-03-15 15:40:16,772 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 515 transitions. Word has length 21 [2022-03-15 15:40:16,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:40:16,772 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 515 transitions. [2022-03-15 15:40:16,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:40:16,772 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 515 transitions. [2022-03-15 15:40:16,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:40:16,773 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:40:16,773 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:40:16,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-15 15:40:16,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-15 15:40:16,989 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:40:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:40:16,989 INFO L85 PathProgramCache]: Analyzing trace with hash -622560102, now seen corresponding path program 131 times [2022-03-15 15:40:16,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:40:16,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079254047] [2022-03-15 15:40:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:40:16,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:40:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:40:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:40:17,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:40:17,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079254047] [2022-03-15 15:40:17,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079254047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:40:17,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425373902] [2022-03-15 15:40:17,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 15:40:17,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:40:17,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:40:17,465 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:40:17,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-15 15:40:17,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 15:40:17,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:40:17,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:40:17,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:40:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:40:18,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:40:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:40:19,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425373902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:40:19,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:40:19,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:40:19,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463562884] [2022-03-15 15:40:19,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:40:19,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:40:19,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:40:19,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:40:19,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:40:19,864 INFO L87 Difference]: Start difference. First operand 210 states and 515 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:40:41,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:40:41,286 INFO L93 Difference]: Finished difference Result 600 states and 1210 transitions. [2022-03-15 15:40:41,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-15 15:40:41,287 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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 21 [2022-03-15 15:40:41,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:40:41,288 INFO L225 Difference]: With dead ends: 600 [2022-03-15 15:40:41,288 INFO L226 Difference]: Without dead ends: 586 [2022-03-15 15:40:41,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5725 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=2764, Invalid=12986, Unknown=0, NotChecked=0, Total=15750 [2022-03-15 15:40:41,289 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 327 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-15 15:40:41,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 394 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1690 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-15 15:40:41,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-03-15 15:40:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 207. [2022-03-15 15:40:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.4514563106796117) internal successors, (505), 206 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:40:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 505 transitions. [2022-03-15 15:40:41,292 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 505 transitions. Word has length 21 [2022-03-15 15:40:41,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:40:41,292 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 505 transitions. [2022-03-15 15:40:41,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:40:41,292 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 505 transitions. [2022-03-15 15:40:41,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:40:41,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:40:41,293 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:40:41,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-15 15:40:41,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-15 15:40:41,505 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:40:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:40:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1386310238, now seen corresponding path program 132 times [2022-03-15 15:40:41,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:40:41,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625054877] [2022-03-15 15:40:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:40:41,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:40:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:40:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:40:42,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:40:42,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625054877] [2022-03-15 15:40:42,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625054877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:40:42,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032334158] [2022-03-15 15:40:42,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 15:40:42,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:40:42,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:40:42,017 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:40:42,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-15 15:40:42,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 15:40:42,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:40:42,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:40:42,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:40:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:40:43,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:40:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:40:45,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032334158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:40:45,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:40:45,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:40:45,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286685034] [2022-03-15 15:40:45,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:40:45,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:40:45,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:40:45,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:40:45,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:40:45,560 INFO L87 Difference]: Start difference. First operand 207 states and 505 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:40:57,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:40:57,063 INFO L93 Difference]: Finished difference Result 425 states and 898 transitions. [2022-03-15 15:40:57,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 15:40:57,063 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:40:57,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:40:57,064 INFO L225 Difference]: With dead ends: 425 [2022-03-15 15:40:57,064 INFO L226 Difference]: Without dead ends: 411 [2022-03-15 15:40:57,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=784, Invalid=5222, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 15:40:57,065 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 244 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-15 15:40:57,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 241 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1203 Invalid, 0 Unknown, 54 Unchecked, 2.6s Time] [2022-03-15 15:40:57,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-03-15 15:40:57,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 216. [2022-03-15 15:40:57,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.4930232558139536) internal successors, (536), 215 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:40:57,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 536 transitions. [2022-03-15 15:40:57,068 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 536 transitions. Word has length 21 [2022-03-15 15:40:57,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:40:57,068 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 536 transitions. [2022-03-15 15:40:57,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:40:57,068 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 536 transitions. [2022-03-15 15:40:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:40:57,068 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:40:57,068 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:40:57,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-03-15 15:40:57,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-03-15 15:40:57,269 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:40:57,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:40:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1003589850, now seen corresponding path program 133 times [2022-03-15 15:40:57,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:40:57,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412513554] [2022-03-15 15:40:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:40:57,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:40:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:40:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:40:57,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:40:57,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412513554] [2022-03-15 15:40:57,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412513554] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:40:57,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983167873] [2022-03-15 15:40:57,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 15:40:57,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:40:57,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:40:57,717 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:40:57,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-15 15:40:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:40:57,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:40:57,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:40:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:40:58,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:41:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:41:03,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983167873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:41:03,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:41:03,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:41:03,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325851204] [2022-03-15 15:41:03,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:41:03,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:41:03,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:41:03,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:41:03,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=745, Unknown=1, NotChecked=0, Total=870 [2022-03-15 15:41:03,033 INFO L87 Difference]: Start difference. First operand 216 states and 536 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:41:15,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:41:15,699 INFO L93 Difference]: Finished difference Result 418 states and 894 transitions. [2022-03-15 15:41:15,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 15:41:15,699 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:41:15,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:41:15,700 INFO L225 Difference]: With dead ends: 418 [2022-03-15 15:41:15,700 INFO L226 Difference]: Without dead ends: 404 [2022-03-15 15:41:15,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=842, Invalid=5163, Unknown=1, NotChecked=0, Total=6006 [2022-03-15 15:41:15,700 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 218 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-15 15:41:15,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 283 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1149 Invalid, 0 Unknown, 100 Unchecked, 2.5s Time] [2022-03-15 15:41:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-03-15 15:41:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 217. [2022-03-15 15:41:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.4953703703703702) internal successors, (539), 216 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:41:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 539 transitions. [2022-03-15 15:41:15,703 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 539 transitions. Word has length 21 [2022-03-15 15:41:15,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:41:15,703 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 539 transitions. [2022-03-15 15:41:15,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:41:15,703 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 539 transitions. [2022-03-15 15:41:15,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:41:15,704 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:41:15,704 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:41:15,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-03-15 15:41:15,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-15 15:41:15,904 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:41:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:41:15,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1212083618, now seen corresponding path program 134 times [2022-03-15 15:41:15,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:41:15,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756265784] [2022-03-15 15:41:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:41:15,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:41:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:41:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:41:16,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:41:16,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756265784] [2022-03-15 15:41:16,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756265784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:41:16,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686290353] [2022-03-15 15:41:16,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 15:41:16,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:41:16,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:41:16,334 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:41:16,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-15 15:41:16,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 15:41:16,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:41:16,355 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:41:16,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:41:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:41:17,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:41:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:41:24,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686290353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:41:24,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:41:24,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:41:24,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943582801] [2022-03-15 15:41:24,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:41:24,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:41:24,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:41:24,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:41:24,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:41:24,760 INFO L87 Difference]: Start difference. First operand 217 states and 539 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:41:45,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 15:41:45,788 INFO L93 Difference]: Finished difference Result 521 states and 1086 transitions. [2022-03-15 15:41:45,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 15:41:45,788 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 15:41:45,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 15:41:45,789 INFO L225 Difference]: With dead ends: 521 [2022-03-15 15:41:45,789 INFO L226 Difference]: Without dead ends: 507 [2022-03-15 15:41:45,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3508 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=1614, Invalid=9098, Unknown=0, NotChecked=0, Total=10712 [2022-03-15 15:41:45,790 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 337 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-15 15:41:45,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 288 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1243 Invalid, 0 Unknown, 159 Unchecked, 2.9s Time] [2022-03-15 15:41:45,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-03-15 15:41:45,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 217. [2022-03-15 15:41:45,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.5) internal successors, (540), 216 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:41:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 540 transitions. [2022-03-15 15:41:45,793 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 540 transitions. Word has length 21 [2022-03-15 15:41:45,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 15:41:45,793 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 540 transitions. [2022-03-15 15:41:45,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 15:41:45,794 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 540 transitions. [2022-03-15 15:41:45,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 15:41:45,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 15:41:45,794 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 15:41:45,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-15 15:41:45,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-03-15 15:41:45,994 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 15:41:45,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 15:41:45,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1196622822, now seen corresponding path program 135 times [2022-03-15 15:41:45,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 15:41:45,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949534385] [2022-03-15 15:41:45,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 15:41:45,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 15:41:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 15:41:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:41:46,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 15:41:46,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949534385] [2022-03-15 15:41:46,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949534385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 15:41:46,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116876516] [2022-03-15 15:41:46,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 15:41:46,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:41:46,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 15:41:46,527 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 15:41:46,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-15 15:41:46,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 15:41:46,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 15:41:46,550 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 15:41:46,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 15:41:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:41:47,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 15:41:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 15:41:50,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116876516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 15:41:50,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 15:41:50,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-03-15 15:41:50,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142244678] [2022-03-15 15:41:50,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 15:41:50,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 15:41:50,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 15:41:50,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 15:41:50,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-15 15:41:50,610 INFO L87 Difference]: Start difference. First operand 217 states and 540 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 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) Received shutdown request... [2022-03-15 15:42:05,242 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 15:42:05,243 WARN L244 SmtUtils]: Removed 3 from assertion stack [2022-03-15 15:42:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 15:42:05,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1969 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=1039, Invalid=5281, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 15:42:05,244 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 185 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-15 15:42:05,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 142 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1057 Invalid, 0 Unknown, 94 Unchecked, 2.7s Time] [2022-03-15 15:42:05,245 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 15:42:05,254 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 15:42:05,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-03-15 15:42:05,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 15:42:05,446 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (217states) and FLOYD_HOARE automaton (currently 58 states, 30 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 76 for 8ms.. [2022-03-15 15:42:05,447 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 15:42:05,447 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 15:42:05,450 INFO L732 BasicCegarLoop]: Path program histogram: [135, 3, 2, 1] [2022-03-15 15:42:05,452 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 15:42:05,452 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 15:42:05,453 INFO L202 PluginConnector]: Adding new model mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 03:42:05 BasicIcfg [2022-03-15 15:42:05,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 15:42:05,453 INFO L158 Benchmark]: Toolchain (without parser) took 892616.74ms. Allocated memory was 182.5MB in the beginning and 421.5MB in the end (delta: 239.1MB). Free memory was 141.9MB in the beginning and 306.4MB in the end (delta: -164.5MB). Peak memory consumption was 77.0MB. Max. memory is 8.0GB. [2022-03-15 15:42:05,453 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 182.5MB. Free memory is still 143.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 15:42:05,453 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.05ms. Allocated memory is still 182.5MB. Free memory was 141.8MB in the beginning and 140.3MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-15 15:42:05,453 INFO L158 Benchmark]: Boogie Preprocessor took 11.81ms. Allocated memory is still 182.5MB. Free memory was 140.3MB in the beginning and 139.4MB in the end (delta: 943.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 15:42:05,453 INFO L158 Benchmark]: RCFGBuilder took 205.83ms. Allocated memory is still 182.5MB. Free memory was 139.3MB in the beginning and 130.5MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-15 15:42:05,453 INFO L158 Benchmark]: TraceAbstraction took 892376.31ms. Allocated memory was 182.5MB in the beginning and 421.5MB in the end (delta: 239.1MB). Free memory was 129.9MB in the beginning and 306.4MB in the end (delta: -176.5MB). Peak memory consumption was 63.4MB. Max. memory is 8.0GB. [2022-03-15 15:42:05,455 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 0.09ms. Allocated memory is still 182.5MB. Free memory is still 143.0MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.05ms. Allocated memory is still 182.5MB. Free memory was 141.8MB in the beginning and 140.3MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.81ms. Allocated memory is still 182.5MB. Free memory was 140.3MB in the beginning and 139.4MB in the end (delta: 943.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 205.83ms. Allocated memory is still 182.5MB. Free memory was 139.3MB in the beginning and 130.5MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 892376.31ms. Allocated memory was 182.5MB in the beginning and 421.5MB in the end (delta: 239.1MB). Free memory was 129.9MB in the beginning and 306.4MB in the end (delta: -176.5MB). Peak memory consumption was 63.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (217states) and FLOYD_HOARE automaton (currently 58 states, 30 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 76 for 8ms.. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (217states) and FLOYD_HOARE automaton (currently 58 states, 30 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 76 for 8ms.. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (217states) and FLOYD_HOARE automaton (currently 58 states, 30 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 76 for 8ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 892.3s, OverallIterations: 141, TraceHistogramMax: 4, PathProgramHistogramMax: 135, EmptinessCheckTime: 0.0s, AutomataDifference: 601.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 22173 SdHoareTripleChecker+Valid, 160.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 22173 mSDsluCounter, 26114 SdHoareTripleChecker+Invalid, 150.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3792 IncrementalHoareTripleChecker+Unchecked, 42426 mSDsCounter, 5066 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 105981 IncrementalHoareTripleChecker+Invalid, 114839 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5066 mSolverCounterUnsat, 2323 mSDtfsCounter, 105981 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9985 GetRequests, 2539 SyntacticMatches, 246 SemanticMatches, 7199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124116 ImplicationChecksByTransitivity, 609.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=217occurred in iteration=139, InterpolantAutomatonStates: 5218, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 140 MinimizatonAttempts, 18125 StatesRemovedByMinimization, 140 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 256.6s InterpolantComputationTime, 5027 NumberOfCodeBlocks, 5027 NumberOfCodeBlocksAsserted, 484 NumberOfCheckSat, 7114 ConstructedInterpolants, 203 QuantifiedInterpolants, 159553 SizeOfPredicates, 1090 NumberOfNonLiveVariables, 7180 ConjunctsInSsa, 3326 ConjunctsInUnsatCore, 421 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3078 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown