/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/MirabelleConcurrentIncrement.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-28 14:32:29,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 14:32:29,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 14:32:29,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-28 14:32:30,011 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 [2022-01-28 14:32:30,035 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 14:32:30,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 14:32:30,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 14:32:30,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 14:32:30,037 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 14:32:30,037 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 14:32:30,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 14:32:30,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 14:32:30,037 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 14:32:30,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 14:32:30,038 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 14:32:30,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 14:32:30,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 14:32:30,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 14:32:30,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 14:32:30,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 14:32:30,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 14:32:30,039 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 14:32:30,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 14:32:30,039 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 14:32:30,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 14:32:30,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 14:32:30,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 14:32:30,039 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 14:32:30,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 14:32:30,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 14:32:30,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 14:32:30,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 14:32:30,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 14:32:30,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 14:32:30,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 14:32:30,041 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 14:32:30,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 14:32:30,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 14:32:30,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 14:32:30,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 14:32:30,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 14:32:30,249 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 14:32:30,261 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 14:32:30,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl [2022-01-28 14:32:30,262 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl' [2022-01-28 14:32:30,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 14:32:30,277 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 14:32:30,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 14:32:30,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 14:32:30,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 14:32:30,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:32:30" (1/1) ... [2022-01-28 14:32:30,293 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:32:30" (1/1) ... [2022-01-28 14:32:30,298 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 14:32:30,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 14:32:30,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 14:32:30,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 14:32:30,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 14:32:30,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:32:30" (1/1) ... [2022-01-28 14:32:30,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:32:30" (1/1) ... [2022-01-28 14:32:30,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:32:30" (1/1) ... [2022-01-28 14:32:30,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:32:30" (1/1) ... [2022-01-28 14:32:30,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:32:30" (1/1) ... [2022-01-28 14:32:30,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:32:30" (1/1) ... [2022-01-28 14:32:30,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:32:30" (1/1) ... [2022-01-28 14:32:30,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 14:32:30,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 14:32:30,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 14:32:30,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 14:32:30,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:32:30" (1/1) ... [2022-01-28 14:32:30,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 14:32:30,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:30,356 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) [2022-01-28 14:32:30,361 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 [2022-01-28 14:32:30,392 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 14:32:30,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 14:32:30,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 14:32:30,393 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T1 given in one single declaration [2022-01-28 14:32:30,393 INFO L130 BoogieDeclarations]: Found specification of procedure T1 [2022-01-28 14:32:30,393 INFO L138 BoogieDeclarations]: Found implementation of procedure T1 [2022-01-28 14:32:30,393 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T2 given in one single declaration [2022-01-28 14:32:30,393 INFO L130 BoogieDeclarations]: Found specification of procedure T2 [2022-01-28 14:32:30,393 INFO L138 BoogieDeclarations]: Found implementation of procedure T2 [2022-01-28 14:32:30,394 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-28 14:32:30,428 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 14:32:30,429 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 14:32:30,480 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 14:32:30,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 14:32:30,485 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-28 14:32:30,486 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:32:30 BoogieIcfgContainer [2022-01-28 14:32:30,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 14:32:30,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 14:32:30,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 14:32:30,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 14:32:30,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 02:32:30" (1/2) ... [2022-01-28 14:32:30,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b633829 and model type MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:32:30, skipping insertion in model container [2022-01-28 14:32:30,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:32:30" (2/2) ... [2022-01-28 14:32:30,491 INFO L111 eAbstractionObserver]: Analyzing ICFG MirabelleConcurrentIncrement.bpl [2022-01-28 14:32:30,494 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 14:32:30,494 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 14:32:30,494 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-28 14:32:30,494 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 14:32:30,511 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-01-28 14:32:30,538 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 14:32:30,542 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, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-28 14:32:30,542 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-28 14:32:30,548 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 62 flow [2022-01-28 14:32:30,559 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:30,560 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:30,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-28 14:32:30,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:30,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:30,565 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:30,568 INFO L85 PathProgramCache]: Analyzing trace with hash -295835678, now seen corresponding path program 1 times [2022-01-28 14:32:30,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:30,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825838871] [2022-01-28 14:32:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:30,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:30,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:30,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825838871] [2022-01-28 14:32:30,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825838871] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:32:30,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:32:30,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-01-28 14:32:30,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948252817] [2022-01-28 14:32:30,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:32:30,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-28 14:32:30,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:30,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-28 14:32:30,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 14:32:30,695 INFO L87 Difference]: Start difference. First operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:30,767 INFO L93 Difference]: Finished difference Result 61 states and 119 transitions. [2022-01-28 14:32:30,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 14:32:30,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-28 14:32:30,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:30,775 INFO L225 Difference]: With dead ends: 61 [2022-01-28 14:32:30,775 INFO L226 Difference]: Without dead ends: 52 [2022-01-28 14:32:30,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 14:32:30,778 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:30,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-28 14:32:30,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-01-28 14:32:30,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:30,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2022-01-28 14:32:30,803 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 10 [2022-01-28 14:32:30,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:30,804 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2022-01-28 14:32:30,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:30,804 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2022-01-28 14:32:30,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-28 14:32:30,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:30,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:30,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 14:32:30,805 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:30,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:30,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1417289504, now seen corresponding path program 1 times [2022-01-28 14:32:30,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:30,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998642803] [2022-01-28 14:32:30,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:30,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:30,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:30,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998642803] [2022-01-28 14:32:30,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998642803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:30,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265898649] [2022-01-28 14:32:30,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:30,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:30,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:30,888 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) [2022-01-28 14:32:30,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-28 14:32:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:30,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-28 14:32:30,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:30,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:30,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:31,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265898649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:31,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:31,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-28 14:32:31,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322094255] [2022-01-28 14:32:31,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:31,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:32:31,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:31,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:32:31,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:32:31,026 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:31,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:31,117 INFO L93 Difference]: Finished difference Result 78 states and 145 transitions. [2022-01-28 14:32:31,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 14:32:31,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-28 14:32:31,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:31,120 INFO L225 Difference]: With dead ends: 78 [2022-01-28 14:32:31,120 INFO L226 Difference]: Without dead ends: 78 [2022-01-28 14:32:31,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:32:31,121 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:31,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 17 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-28 14:32:31,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2022-01-28 14:32:31,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2022-01-28 14:32:31,127 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 12 [2022-01-28 14:32:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:31,127 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2022-01-28 14:32:31,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2022-01-28 14:32:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-28 14:32:31,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:31,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:31,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-28 14:32:31,329 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 [2022-01-28 14:32:31,330 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:31,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:31,332 INFO L85 PathProgramCache]: Analyzing trace with hash -860047836, now seen corresponding path program 1 times [2022-01-28 14:32:31,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:31,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144460004] [2022-01-28 14:32:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:31,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:31,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:31,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144460004] [2022-01-28 14:32:31,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144460004] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:32:31,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:32:31,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 14:32:31,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139016371] [2022-01-28 14:32:31,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:32:31,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 14:32:31,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:31,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 14:32:31,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:32:31,370 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:31,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:31,392 INFO L93 Difference]: Finished difference Result 51 states and 93 transitions. [2022-01-28 14:32:31,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 14:32:31,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-28 14:32:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:31,393 INFO L225 Difference]: With dead ends: 51 [2022-01-28 14:32:31,393 INFO L226 Difference]: Without dead ends: 43 [2022-01-28 14:32:31,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:32:31,394 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:31,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 6 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:32:31,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-28 14:32:31,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-01-28 14:32:31,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2022-01-28 14:32:31,399 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 12 [2022-01-28 14:32:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:31,399 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2022-01-28 14:32:31,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:31,400 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2022-01-28 14:32:31,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-28 14:32:31,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:31,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:31,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-28 14:32:31,400 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:31,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1158712992, now seen corresponding path program 2 times [2022-01-28 14:32:31,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:31,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841037328] [2022-01-28 14:32:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:31,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:31,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:31,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841037328] [2022-01-28 14:32:31,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841037328] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:32:31,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:32:31,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 14:32:31,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839120772] [2022-01-28 14:32:31,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:32:31,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:32:31,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:31,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:32:31,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:32:31,457 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:31,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:31,501 INFO L93 Difference]: Finished difference Result 48 states and 93 transitions. [2022-01-28 14:32:31,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:32:31,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-28 14:32:31,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:31,505 INFO L225 Difference]: With dead ends: 48 [2022-01-28 14:32:31,505 INFO L226 Difference]: Without dead ends: 48 [2022-01-28 14:32:31,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:32:31,506 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:31,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:32:31,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-28 14:32:31,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-01-28 14:32:31,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:31,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 85 transitions. [2022-01-28 14:32:31,511 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 85 transitions. Word has length 12 [2022-01-28 14:32:31,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:31,511 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 85 transitions. [2022-01-28 14:32:31,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:31,511 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 85 transitions. [2022-01-28 14:32:31,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-28 14:32:31,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:31,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:31,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-28 14:32:31,512 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:31,513 INFO L85 PathProgramCache]: Analyzing trace with hash 480777698, now seen corresponding path program 1 times [2022-01-28 14:32:31,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:31,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500261577] [2022-01-28 14:32:31,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:31,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:31,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:31,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500261577] [2022-01-28 14:32:31,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500261577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:31,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692540784] [2022-01-28 14:32:31,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:31,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:31,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:31,592 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) [2022-01-28 14:32:31,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-28 14:32:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:31,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:31,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:31,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:31,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692540784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:31,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:31,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-01-28 14:32:31,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491822635] [2022-01-28 14:32:31,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:31,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 14:32:31,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:31,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 14:32:31,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:32:31,713 INFO L87 Difference]: Start difference. First operand 44 states and 85 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:31,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:31,764 INFO L93 Difference]: Finished difference Result 107 states and 210 transitions. [2022-01-28 14:32:31,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 14:32:31,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-28 14:32:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:31,766 INFO L225 Difference]: With dead ends: 107 [2022-01-28 14:32:31,766 INFO L226 Difference]: Without dead ends: 98 [2022-01-28 14:32:31,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:32:31,769 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:31,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 15 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:32:31,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-28 14:32:31,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2022-01-28 14:32:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 146 transitions. [2022-01-28 14:32:31,784 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 146 transitions. Word has length 14 [2022-01-28 14:32:31,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:31,784 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 146 transitions. [2022-01-28 14:32:31,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:31,784 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 146 transitions. [2022-01-28 14:32:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-28 14:32:31,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:31,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:31,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:32,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:32,005 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:32,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:32,006 INFO L85 PathProgramCache]: Analyzing trace with hash 110295842, now seen corresponding path program 2 times [2022-01-28 14:32:32,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:32,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103585071] [2022-01-28 14:32:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:32,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:32:32,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:32,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103585071] [2022-01-28 14:32:32,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103585071] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:32:32,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 14:32:32,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-28 14:32:32,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554140288] [2022-01-28 14:32:32,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:32:32,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 14:32:32,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:32,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 14:32:32,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:32:32,074 INFO L87 Difference]: Start difference. First operand 70 states and 146 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:32,112 INFO L93 Difference]: Finished difference Result 127 states and 259 transitions. [2022-01-28 14:32:32,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 14:32:32,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-28 14:32:32,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:32,114 INFO L225 Difference]: With dead ends: 127 [2022-01-28 14:32:32,114 INFO L226 Difference]: Without dead ends: 118 [2022-01-28 14:32:32,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 14:32:32,119 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:32,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 15 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:32:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-28 14:32:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2022-01-28 14:32:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.191011235955056) internal successors, (195), 89 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 195 transitions. [2022-01-28 14:32:32,129 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 195 transitions. Word has length 14 [2022-01-28 14:32:32,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:32,130 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 195 transitions. [2022-01-28 14:32:32,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:32,130 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 195 transitions. [2022-01-28 14:32:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-28 14:32:32,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:32,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:32,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-28 14:32:32,131 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:32,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:32,131 INFO L85 PathProgramCache]: Analyzing trace with hash 523927072, now seen corresponding path program 3 times [2022-01-28 14:32:32,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:32,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283691784] [2022-01-28 14:32:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:32,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:32,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:32,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283691784] [2022-01-28 14:32:32,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283691784] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:32,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627163199] [2022-01-28 14:32:32,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:32:32,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:32,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:32,170 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) [2022-01-28 14:32:32,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-28 14:32:32,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:32:32,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:32,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:32:32,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:32,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:32,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627163199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:32,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:32,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-28 14:32:32,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083641683] [2022-01-28 14:32:32,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:32,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:32:32,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:32,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:32:32,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:32:32,301 INFO L87 Difference]: Start difference. First operand 90 states and 195 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:32,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:32,398 INFO L93 Difference]: Finished difference Result 176 states and 345 transitions. [2022-01-28 14:32:32,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:32:32,398 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-28 14:32:32,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:32,399 INFO L225 Difference]: With dead ends: 176 [2022-01-28 14:32:32,399 INFO L226 Difference]: Without dead ends: 176 [2022-01-28 14:32:32,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:32:32,400 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:32,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 31 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:32,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-28 14:32:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 92. [2022-01-28 14:32:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.208791208791209) internal successors, (201), 91 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 201 transitions. [2022-01-28 14:32:32,406 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 201 transitions. Word has length 16 [2022-01-28 14:32:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:32,406 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 201 transitions. [2022-01-28 14:32:32,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 201 transitions. [2022-01-28 14:32:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-28 14:32:32,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:32,407 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:32,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:32,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:32,626 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:32,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:32,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1858903004, now seen corresponding path program 4 times [2022-01-28 14:32:32,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:32,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737263704] [2022-01-28 14:32:32,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:32,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:32,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:32,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737263704] [2022-01-28 14:32:32,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737263704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:32,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346612335] [2022-01-28 14:32:32,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:32:32,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:32,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:32,678 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) [2022-01-28 14:32:32,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-28 14:32:32,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:32:32,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:32,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:32:32,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:32,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:32,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346612335] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:32,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:32,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-28 14:32:32,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381754294] [2022-01-28 14:32:32,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:32,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:32:32,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:32,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:32:32,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:32:32,788 INFO L87 Difference]: Start difference. First operand 92 states and 201 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:32,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:32,845 INFO L93 Difference]: Finished difference Result 161 states and 325 transitions. [2022-01-28 14:32:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:32:32,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-28 14:32:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:32,846 INFO L225 Difference]: With dead ends: 161 [2022-01-28 14:32:32,846 INFO L226 Difference]: Without dead ends: 150 [2022-01-28 14:32:32,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:32:32,847 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 80 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:32,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 15 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:32:32,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-28 14:32:32,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 112. [2022-01-28 14:32:32,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.1981981981981984) internal successors, (244), 111 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) [2022-01-28 14:32:32,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 244 transitions. [2022-01-28 14:32:32,864 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 244 transitions. Word has length 16 [2022-01-28 14:32:32,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:32,865 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 244 transitions. [2022-01-28 14:32:32,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:32,865 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 244 transitions. [2022-01-28 14:32:32,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-28 14:32:32,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:32,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:32,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:33,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:33,067 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:33,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:33,081 INFO L85 PathProgramCache]: Analyzing trace with hash 794512882, now seen corresponding path program 5 times [2022-01-28 14:32:33,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:33,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95246886] [2022-01-28 14:32:33,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:33,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:33,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:33,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95246886] [2022-01-28 14:32:33,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95246886] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:33,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015271283] [2022-01-28 14:32:33,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:32:33,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:33,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:33,110 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) [2022-01-28 14:32:33,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-28 14:32:33,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:32:33,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:33,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:32:33,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:33,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:33,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015271283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:33,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:33,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-28 14:32:33,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881598350] [2022-01-28 14:32:33,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:33,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:32:33,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:33,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:32:33,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:32:33,186 INFO L87 Difference]: Start difference. First operand 112 states and 244 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:33,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:33,247 INFO L93 Difference]: Finished difference Result 154 states and 311 transitions. [2022-01-28 14:32:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:32:33,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-28 14:32:33,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:33,248 INFO L225 Difference]: With dead ends: 154 [2022-01-28 14:32:33,248 INFO L226 Difference]: Without dead ends: 154 [2022-01-28 14:32:33,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:32:33,260 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:33,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 18 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:32:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-28 14:32:33,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 110. [2022-01-28 14:32:33,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1743119266055047) internal successors, (237), 109 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 237 transitions. [2022-01-28 14:32:33,264 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 237 transitions. Word has length 16 [2022-01-28 14:32:33,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:33,264 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 237 transitions. [2022-01-28 14:32:33,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:33,264 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 237 transitions. [2022-01-28 14:32:33,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-28 14:32:33,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:33,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:33,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:33,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:33,465 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:33,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:33,466 INFO L85 PathProgramCache]: Analyzing trace with hash 305629652, now seen corresponding path program 6 times [2022-01-28 14:32:33,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:33,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882727078] [2022-01-28 14:32:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:33,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:33,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:33,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882727078] [2022-01-28 14:32:33,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882727078] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:33,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353473319] [2022-01-28 14:32:33,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:32:33,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:33,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:33,508 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) [2022-01-28 14:32:33,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-28 14:32:33,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:32:33,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:33,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:32:33,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:33,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:33,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353473319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:33,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:33,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-28 14:32:33,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176037515] [2022-01-28 14:32:33,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:33,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:32:33,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:33,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:32:33,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:32:33,596 INFO L87 Difference]: Start difference. First operand 110 states and 237 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:33,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:33,637 INFO L93 Difference]: Finished difference Result 144 states and 290 transitions. [2022-01-28 14:32:33,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-28 14:32:33,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-28 14:32:33,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:33,638 INFO L225 Difference]: With dead ends: 144 [2022-01-28 14:32:33,638 INFO L226 Difference]: Without dead ends: 141 [2022-01-28 14:32:33,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:32:33,638 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:33,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 13 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:32:33,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-28 14:32:33,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2022-01-28 14:32:33,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 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) [2022-01-28 14:32:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2022-01-28 14:32:33,648 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 16 [2022-01-28 14:32:33,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:33,648 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2022-01-28 14:32:33,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:33,663 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2022-01-28 14:32:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-28 14:32:33,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:33,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:33,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:33,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:33,902 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:33,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:33,902 INFO L85 PathProgramCache]: Analyzing trace with hash 867656288, now seen corresponding path program 7 times [2022-01-28 14:32:33,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:33,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942284892] [2022-01-28 14:32:33,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:33,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:33,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:33,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942284892] [2022-01-28 14:32:33,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942284892] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:33,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417020695] [2022-01-28 14:32:33,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:32:33,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:33,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:33,939 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) [2022-01-28 14:32:33,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-28 14:32:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:33,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:32:33,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:33,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:34,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417020695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:34,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:34,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-28 14:32:34,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631546514] [2022-01-28 14:32:34,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:34,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:32:34,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:34,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:32:34,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:32:34,038 INFO L87 Difference]: Start difference. First operand 113 states and 241 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:34,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:34,105 INFO L93 Difference]: Finished difference Result 195 states and 392 transitions. [2022-01-28 14:32:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:32:34,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-28 14:32:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:34,106 INFO L225 Difference]: With dead ends: 195 [2022-01-28 14:32:34,106 INFO L226 Difference]: Without dead ends: 195 [2022-01-28 14:32:34,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:32:34,107 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:34,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 17 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:32:34,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-28 14:32:34,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 122. [2022-01-28 14:32:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1983471074380163) internal successors, (266), 121 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 266 transitions. [2022-01-28 14:32:34,111 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 266 transitions. Word has length 16 [2022-01-28 14:32:34,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:34,111 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 266 transitions. [2022-01-28 14:32:34,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:34,111 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 266 transitions. [2022-01-28 14:32:34,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-28 14:32:34,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:34,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:34,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:34,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:34,328 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:34,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:34,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1409681052, now seen corresponding path program 8 times [2022-01-28 14:32:34,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:34,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440329808] [2022-01-28 14:32:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:34,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:34,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:34,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440329808] [2022-01-28 14:32:34,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440329808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:34,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534733629] [2022-01-28 14:32:34,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:32:34,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:34,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:34,355 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) [2022-01-28 14:32:34,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-28 14:32:34,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:32:34,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:34,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:32:34,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:34,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:34,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534733629] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:34,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:34,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-28 14:32:34,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470141800] [2022-01-28 14:32:34,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:34,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:32:34,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:34,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:32:34,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:32:34,432 INFO L87 Difference]: Start difference. First operand 122 states and 266 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:34,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:34,499 INFO L93 Difference]: Finished difference Result 177 states and 366 transitions. [2022-01-28 14:32:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-28 14:32:34,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-28 14:32:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:34,500 INFO L225 Difference]: With dead ends: 177 [2022-01-28 14:32:34,500 INFO L226 Difference]: Without dead ends: 174 [2022-01-28 14:32:34,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:32:34,501 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:34,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-28 14:32:34,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 128. [2022-01-28 14:32:34,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.251968503937008) internal successors, (286), 127 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) [2022-01-28 14:32:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 286 transitions. [2022-01-28 14:32:34,505 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 286 transitions. Word has length 16 [2022-01-28 14:32:34,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:34,505 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 286 transitions. [2022-01-28 14:32:34,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:34,505 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 286 transitions. [2022-01-28 14:32:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-28 14:32:34,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:34,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:34,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-28 14:32:34,724 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,SelfDestructingSolverStorable11 [2022-01-28 14:32:34,724 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:34,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:34,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1755170378, now seen corresponding path program 9 times [2022-01-28 14:32:34,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:34,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118211460] [2022-01-28 14:32:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:34,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:34,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:34,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118211460] [2022-01-28 14:32:34,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118211460] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:34,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270921994] [2022-01-28 14:32:34,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:32:34,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:34,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:34,779 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) [2022-01-28 14:32:34,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-28 14:32:34,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:32:34,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:34,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:32:34,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:34,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:34,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270921994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:34,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:34,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-28 14:32:34,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87485607] [2022-01-28 14:32:34,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:34,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:32:34,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:34,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:32:34,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:32:34,872 INFO L87 Difference]: Start difference. First operand 128 states and 286 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:34,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:34,923 INFO L93 Difference]: Finished difference Result 184 states and 383 transitions. [2022-01-28 14:32:34,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:32:34,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-28 14:32:34,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:34,925 INFO L225 Difference]: With dead ends: 184 [2022-01-28 14:32:34,925 INFO L226 Difference]: Without dead ends: 184 [2022-01-28 14:32:34,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:32:34,926 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:34,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 24 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:32:34,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-28 14:32:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 130. [2022-01-28 14:32:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.248062015503876) internal successors, (290), 129 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 290 transitions. [2022-01-28 14:32:34,931 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 290 transitions. Word has length 16 [2022-01-28 14:32:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:34,931 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 290 transitions. [2022-01-28 14:32:34,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 290 transitions. [2022-01-28 14:32:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-28 14:32:34,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:34,932 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:34,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:35,162 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,SelfDestructingSolverStorable12 [2022-01-28 14:32:35,163 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:35,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2050913688, now seen corresponding path program 10 times [2022-01-28 14:32:35,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:35,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722884464] [2022-01-28 14:32:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:35,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:35,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:35,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722884464] [2022-01-28 14:32:35,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722884464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:35,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640689001] [2022-01-28 14:32:35,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:32:35,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:35,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:35,189 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) [2022-01-28 14:32:35,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-28 14:32:35,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:32:35,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:35,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:32:35,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:35,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:35,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640689001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:35,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:35,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-28 14:32:35,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702737348] [2022-01-28 14:32:35,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:35,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:32:35,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:35,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:32:35,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:32:35,261 INFO L87 Difference]: Start difference. First operand 130 states and 290 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:35,330 INFO L93 Difference]: Finished difference Result 192 states and 395 transitions. [2022-01-28 14:32:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-28 14:32:35,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-28 14:32:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:35,331 INFO L225 Difference]: With dead ends: 192 [2022-01-28 14:32:35,331 INFO L226 Difference]: Without dead ends: 189 [2022-01-28 14:32:35,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:32:35,331 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 54 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:35,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 14 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-28 14:32:35,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 130. [2022-01-28 14:32:35,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.24031007751938) internal successors, (289), 129 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 289 transitions. [2022-01-28 14:32:35,335 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 289 transitions. Word has length 16 [2022-01-28 14:32:35,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:35,335 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 289 transitions. [2022-01-28 14:32:35,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:35,335 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 289 transitions. [2022-01-28 14:32:35,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-28 14:32:35,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:35,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:35,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-28 14:32:35,547 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,SelfDestructingSolverStorable13 [2022-01-28 14:32:35,547 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:35,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:35,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1466711538, now seen corresponding path program 11 times [2022-01-28 14:32:35,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:35,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267182641] [2022-01-28 14:32:35,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:35,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:35,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:35,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267182641] [2022-01-28 14:32:35,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267182641] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:35,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144959788] [2022-01-28 14:32:35,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:32:35,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:35,570 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) [2022-01-28 14:32:35,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-28 14:32:35,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 14:32:35,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:35,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:32:35,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:35,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:35,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144959788] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:35,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:35,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-28 14:32:35,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43688233] [2022-01-28 14:32:35,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:35,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:32:35,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:35,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:32:35,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:32:35,638 INFO L87 Difference]: Start difference. First operand 130 states and 289 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:35,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:35,711 INFO L93 Difference]: Finished difference Result 173 states and 357 transitions. [2022-01-28 14:32:35,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:32:35,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-28 14:32:35,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:35,712 INFO L225 Difference]: With dead ends: 173 [2022-01-28 14:32:35,712 INFO L226 Difference]: Without dead ends: 173 [2022-01-28 14:32:35,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:32:35,712 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:35,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 23 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:35,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-28 14:32:35,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2022-01-28 14:32:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.208) internal successors, (276), 125 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) [2022-01-28 14:32:35,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 276 transitions. [2022-01-28 14:32:35,715 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 276 transitions. Word has length 16 [2022-01-28 14:32:35,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:35,715 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 276 transitions. [2022-01-28 14:32:35,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:35,715 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 276 transitions. [2022-01-28 14:32:35,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-28 14:32:35,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:35,716 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:35,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:35,932 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,SelfDestructingSolverStorable14 [2022-01-28 14:32:35,932 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:35,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:35,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1706198030, now seen corresponding path program 12 times [2022-01-28 14:32:35,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:35,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326808065] [2022-01-28 14:32:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:35,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:35,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:35,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326808065] [2022-01-28 14:32:35,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326808065] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:35,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761368756] [2022-01-28 14:32:35,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:32:35,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:35,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:35,962 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) [2022-01-28 14:32:35,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-28 14:32:35,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 14:32:35,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:35,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 14:32:35,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:36,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:36,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761368756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:36,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:36,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-28 14:32:36,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837208406] [2022-01-28 14:32:36,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:36,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:32:36,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:36,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:32:36,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:32:36,052 INFO L87 Difference]: Start difference. First operand 126 states and 276 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:36,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:36,117 INFO L93 Difference]: Finished difference Result 188 states and 378 transitions. [2022-01-28 14:32:36,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 14:32:36,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-28 14:32:36,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:36,118 INFO L225 Difference]: With dead ends: 188 [2022-01-28 14:32:36,118 INFO L226 Difference]: Without dead ends: 179 [2022-01-28 14:32:36,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:32:36,118 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 75 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:36,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 14 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:32:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-28 14:32:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 132. [2022-01-28 14:32:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 131 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2022-01-28 14:32:36,122 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 16 [2022-01-28 14:32:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:36,122 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2022-01-28 14:32:36,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2022-01-28 14:32:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 14:32:36,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:36,123 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:36,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:36,336 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,SelfDestructingSolverStorable15 [2022-01-28 14:32:36,336 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:36,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:36,336 INFO L85 PathProgramCache]: Analyzing trace with hash 952939746, now seen corresponding path program 13 times [2022-01-28 14:32:36,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:36,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937919628] [2022-01-28 14:32:36,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:36,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:36,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:36,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937919628] [2022-01-28 14:32:36,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937919628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:36,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607862005] [2022-01-28 14:32:36,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:32:36,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:36,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:36,384 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) [2022-01-28 14:32:36,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-28 14:32:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:36,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 14:32:36,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:36,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:36,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607862005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:36,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:36,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-01-28 14:32:36,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996257979] [2022-01-28 14:32:36,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:36,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:32:36,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:36,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:32:36,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:32:36,528 INFO L87 Difference]: Start difference. First operand 132 states and 287 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:36,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:36,602 INFO L93 Difference]: Finished difference Result 239 states and 502 transitions. [2022-01-28 14:32:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:32:36,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-28 14:32:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:36,603 INFO L225 Difference]: With dead ends: 239 [2022-01-28 14:32:36,603 INFO L226 Difference]: Without dead ends: 230 [2022-01-28 14:32:36,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:32:36,604 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:36,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 26 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:36,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-28 14:32:36,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 177. [2022-01-28 14:32:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2556818181818183) internal successors, (397), 176 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:36,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 397 transitions. [2022-01-28 14:32:36,608 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 397 transitions. Word has length 18 [2022-01-28 14:32:36,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:36,608 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 397 transitions. [2022-01-28 14:32:36,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:36,608 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 397 transitions. [2022-01-28 14:32:36,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 14:32:36,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:36,609 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:36,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:36,841 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,SelfDestructingSolverStorable16 [2022-01-28 14:32:36,841 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:36,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:36,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1031679842, now seen corresponding path program 14 times [2022-01-28 14:32:36,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:36,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460462064] [2022-01-28 14:32:36,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:36,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:32:36,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:36,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460462064] [2022-01-28 14:32:36,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460462064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:36,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907976065] [2022-01-28 14:32:36,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:32:36,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:36,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:36,904 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) [2022-01-28 14:32:36,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:32:36,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:36,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-28 14:32:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:36,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-28 14:32:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:37,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:37,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907976065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:37,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:37,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 11 [2022-01-28 14:32:37,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169331763] [2022-01-28 14:32:37,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:37,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 14:32:37,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:37,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 14:32:37,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-28 14:32:37,175 INFO L87 Difference]: Start difference. First operand 177 states and 397 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:37,401 INFO L93 Difference]: Finished difference Result 461 states and 960 transitions. [2022-01-28 14:32:37,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:32:37,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-28 14:32:37,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:37,403 INFO L225 Difference]: With dead ends: 461 [2022-01-28 14:32:37,403 INFO L226 Difference]: Without dead ends: 443 [2022-01-28 14:32:37,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:32:37,404 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 175 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:37,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 88 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:32:37,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-28 14:32:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 222. [2022-01-28 14:32:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3076923076923075) internal successors, (510), 221 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 510 transitions. [2022-01-28 14:32:37,410 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 510 transitions. Word has length 18 [2022-01-28 14:32:37,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:37,410 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 510 transitions. [2022-01-28 14:32:37,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:37,410 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 510 transitions. [2022-01-28 14:32:37,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 14:32:37,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:37,411 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:37,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:37,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:37,628 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:37,628 INFO L85 PathProgramCache]: Analyzing trace with hash 907963746, now seen corresponding path program 15 times [2022-01-28 14:32:37,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:37,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861954732] [2022-01-28 14:32:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:37,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:32:37,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:37,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861954732] [2022-01-28 14:32:37,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861954732] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:37,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562367549] [2022-01-28 14:32:37,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:32:37,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:37,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:37,676 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) [2022-01-28 14:32:37,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-28 14:32:37,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:32:37,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:37,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-28 14:32:37,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:32:37,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:32:37,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562367549] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:37,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:37,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-01-28 14:32:37,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015921873] [2022-01-28 14:32:37,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:37,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 14:32:37,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:37,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 14:32:37,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:32:37,783 INFO L87 Difference]: Start difference. First operand 222 states and 510 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:37,843 INFO L93 Difference]: Finished difference Result 325 states and 717 transitions. [2022-01-28 14:32:37,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 14:32:37,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-28 14:32:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:37,844 INFO L225 Difference]: With dead ends: 325 [2022-01-28 14:32:37,844 INFO L226 Difference]: Without dead ends: 316 [2022-01-28 14:32:37,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-28 14:32:37,845 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:37,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:37,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-28 14:32:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 263. [2022-01-28 14:32:37,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.33587786259542) internal successors, (612), 262 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:37,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 612 transitions. [2022-01-28 14:32:37,850 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 612 transitions. Word has length 18 [2022-01-28 14:32:37,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:37,850 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 612 transitions. [2022-01-28 14:32:37,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:37,850 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 612 transitions. [2022-01-28 14:32:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:37,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:37,851 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:37,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:38,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:38,068 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:38,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:38,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1599393312, now seen corresponding path program 16 times [2022-01-28 14:32:38,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:38,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926349633] [2022-01-28 14:32:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:38,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:38,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:38,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926349633] [2022-01-28 14:32:38,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926349633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:38,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226238857] [2022-01-28 14:32:38,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:32:38,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:38,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:38,104 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) [2022-01-28 14:32:38,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-28 14:32:38,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:32:38,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:38,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:38,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:38,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:38,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226238857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:38,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:38,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-28 14:32:38,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671153804] [2022-01-28 14:32:38,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:38,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 14:32:38,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:38,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 14:32:38,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:32:38,207 INFO L87 Difference]: Start difference. First operand 263 states and 612 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:38,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:38,342 INFO L93 Difference]: Finished difference Result 408 states and 863 transitions. [2022-01-28 14:32:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:32:38,342 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:32:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:38,344 INFO L225 Difference]: With dead ends: 408 [2022-01-28 14:32:38,344 INFO L226 Difference]: Without dead ends: 408 [2022-01-28 14:32:38,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-28 14:32:38,344 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:38,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 48 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:38,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-28 14:32:38,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 247. [2022-01-28 14:32:38,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.3252032520325203) internal successors, (572), 246 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:38,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 572 transitions. [2022-01-28 14:32:38,350 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 572 transitions. Word has length 20 [2022-01-28 14:32:38,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:38,350 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 572 transitions. [2022-01-28 14:32:38,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:38,350 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 572 transitions. [2022-01-28 14:32:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:38,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:38,351 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:38,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:38,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:38,566 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:38,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:38,567 INFO L85 PathProgramCache]: Analyzing trace with hash 917259044, now seen corresponding path program 17 times [2022-01-28 14:32:38,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:38,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048768702] [2022-01-28 14:32:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:38,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:38,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:38,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048768702] [2022-01-28 14:32:38,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048768702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:38,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342940459] [2022-01-28 14:32:38,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:32:38,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:38,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:38,599 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) [2022-01-28 14:32:38,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-28 14:32:38,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:32:38,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:38,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:38,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:38,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:38,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342940459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:38,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:38,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-28 14:32:38,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028177474] [2022-01-28 14:32:38,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:38,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 14:32:38,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:38,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 14:32:38,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:32:38,686 INFO L87 Difference]: Start difference. First operand 247 states and 572 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:38,789 INFO L93 Difference]: Finished difference Result 378 states and 807 transitions. [2022-01-28 14:32:38,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:32:38,790 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:32:38,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:38,791 INFO L225 Difference]: With dead ends: 378 [2022-01-28 14:32:38,791 INFO L226 Difference]: Without dead ends: 361 [2022-01-28 14:32:38,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:32:38,792 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 135 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:38,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 20 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:38,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-01-28 14:32:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 274. [2022-01-28 14:32:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.3076923076923075) internal successors, (630), 273 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 630 transitions. [2022-01-28 14:32:38,798 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 630 transitions. Word has length 20 [2022-01-28 14:32:38,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:38,798 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 630 transitions. [2022-01-28 14:32:38,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:38,798 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 630 transitions. [2022-01-28 14:32:38,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:38,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:38,799 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:38,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:39,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:39,021 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:39,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:39,021 INFO L85 PathProgramCache]: Analyzing trace with hash -699439250, now seen corresponding path program 18 times [2022-01-28 14:32:39,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:39,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680019936] [2022-01-28 14:32:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:39,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:39,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:39,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680019936] [2022-01-28 14:32:39,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680019936] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:39,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615299141] [2022-01-28 14:32:39,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:32:39,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:39,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:39,048 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) [2022-01-28 14:32:39,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-28 14:32:39,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:32:39,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:39,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:39,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:39,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:39,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615299141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:39,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:39,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:32:39,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073026707] [2022-01-28 14:32:39,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:39,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:32:39,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:39,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:32:39,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:32:39,134 INFO L87 Difference]: Start difference. First operand 274 states and 630 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:39,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:39,223 INFO L93 Difference]: Finished difference Result 361 states and 773 transitions. [2022-01-28 14:32:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:32:39,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:32:39,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:39,225 INFO L225 Difference]: With dead ends: 361 [2022-01-28 14:32:39,225 INFO L226 Difference]: Without dead ends: 361 [2022-01-28 14:32:39,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:32:39,225 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 69 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:39,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 29 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-01-28 14:32:39,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 253. [2022-01-28 14:32:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.261904761904762) internal successors, (570), 252 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 570 transitions. [2022-01-28 14:32:39,231 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 570 transitions. Word has length 20 [2022-01-28 14:32:39,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:39,231 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 570 transitions. [2022-01-28 14:32:39,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:39,231 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 570 transitions. [2022-01-28 14:32:39,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:39,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:39,232 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:39,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:39,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:39,448 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:39,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:39,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1188322480, now seen corresponding path program 19 times [2022-01-28 14:32:39,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:39,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872320794] [2022-01-28 14:32:39,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:39,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:39,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:39,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872320794] [2022-01-28 14:32:39,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872320794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:39,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149560543] [2022-01-28 14:32:39,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:32:39,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:39,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:39,502 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) [2022-01-28 14:32:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:39,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:39,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:39,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-28 14:32:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:39,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:39,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149560543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:39,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:39,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:32:39,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445851398] [2022-01-28 14:32:39,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:39,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:32:39,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:39,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:32:39,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:32:39,583 INFO L87 Difference]: Start difference. First operand 253 states and 570 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:39,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:39,657 INFO L93 Difference]: Finished difference Result 308 states and 661 transitions. [2022-01-28 14:32:39,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:32:39,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:32:39,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:39,659 INFO L225 Difference]: With dead ends: 308 [2022-01-28 14:32:39,659 INFO L226 Difference]: Without dead ends: 305 [2022-01-28 14:32:39,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:32:39,659 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:39,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 17 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:39,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-01-28 14:32:39,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 253. [2022-01-28 14:32:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.257936507936508) internal successors, (569), 252 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 569 transitions. [2022-01-28 14:32:39,665 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 569 transitions. Word has length 20 [2022-01-28 14:32:39,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:39,665 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 569 transitions. [2022-01-28 14:32:39,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:39,665 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 569 transitions. [2022-01-28 14:32:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:39,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:39,665 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:39,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:39,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:39,882 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:39,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:39,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1554417312, now seen corresponding path program 20 times [2022-01-28 14:32:39,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:39,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815837647] [2022-01-28 14:32:39,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:39,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:39,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:39,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815837647] [2022-01-28 14:32:39,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815837647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:39,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786570728] [2022-01-28 14:32:39,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:32:39,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:39,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:39,914 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) [2022-01-28 14:32:39,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-28 14:32:39,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:32:39,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:39,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:39,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:39,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:40,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786570728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:40,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:40,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:32:40,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594014828] [2022-01-28 14:32:40,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:40,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:32:40,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:40,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:32:40,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:32:40,017 INFO L87 Difference]: Start difference. First operand 253 states and 569 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:40,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:40,111 INFO L93 Difference]: Finished difference Result 420 states and 883 transitions. [2022-01-28 14:32:40,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:32:40,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:32:40,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:40,113 INFO L225 Difference]: With dead ends: 420 [2022-01-28 14:32:40,113 INFO L226 Difference]: Without dead ends: 420 [2022-01-28 14:32:40,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:32:40,114 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 66 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:40,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 30 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-28 14:32:40,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 271. [2022-01-28 14:32:40,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.2888888888888888) internal successors, (618), 270 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:40,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 618 transitions. [2022-01-28 14:32:40,120 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 618 transitions. Word has length 20 [2022-01-28 14:32:40,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:40,120 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 618 transitions. [2022-01-28 14:32:40,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:40,120 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 618 transitions. [2022-01-28 14:32:40,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:40,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:40,121 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:40,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:40,337 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,SelfDestructingSolverStorable23 [2022-01-28 14:32:40,337 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:40,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:40,337 INFO L85 PathProgramCache]: Analyzing trace with hash -722920028, now seen corresponding path program 21 times [2022-01-28 14:32:40,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:40,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201023573] [2022-01-28 14:32:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:40,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:40,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:40,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201023573] [2022-01-28 14:32:40,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201023573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:40,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91391544] [2022-01-28 14:32:40,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:32:40,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:40,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:40,365 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) [2022-01-28 14:32:40,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-28 14:32:40,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:32:40,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:40,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:40,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:32:40,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 14:32:40,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91391544] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:40,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:40,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-01-28 14:32:40,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775418064] [2022-01-28 14:32:40,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:40,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 14:32:40,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:40,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 14:32:40,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:32:40,554 INFO L87 Difference]: Start difference. First operand 271 states and 618 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2022-01-28 14:32:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:40,931 INFO L93 Difference]: Finished difference Result 387 states and 834 transitions. [2022-01-28 14:32:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 14:32:40,931 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 20 [2022-01-28 14:32:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:40,932 INFO L225 Difference]: With dead ends: 387 [2022-01-28 14:32:40,933 INFO L226 Difference]: Without dead ends: 301 [2022-01-28 14:32:40,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2022-01-28 14:32:40,933 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 165 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:40,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 37 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:40,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-28 14:32:40,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 233. [2022-01-28 14:32:40,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.293103448275862) internal successors, (532), 232 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 532 transitions. [2022-01-28 14:32:40,938 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 532 transitions. Word has length 20 [2022-01-28 14:32:40,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:40,938 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 532 transitions. [2022-01-28 14:32:40,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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) [2022-01-28 14:32:40,938 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 532 transitions. [2022-01-28 14:32:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:40,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:40,939 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:40,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:41,157 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,SelfDestructingSolverStorable24 [2022-01-28 14:32:41,157 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:41,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:41,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1557292584, now seen corresponding path program 22 times [2022-01-28 14:32:41,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:41,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644015844] [2022-01-28 14:32:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:41,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:41,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:41,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644015844] [2022-01-28 14:32:41,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644015844] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:41,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690427167] [2022-01-28 14:32:41,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:32:41,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:41,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:41,189 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) [2022-01-28 14:32:41,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-28 14:32:41,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:32:41,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:41,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:41,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:41,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:41,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690427167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:41,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:41,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:32:41,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945990458] [2022-01-28 14:32:41,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:41,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:32:41,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:41,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:32:41,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:32:41,271 INFO L87 Difference]: Start difference. First operand 233 states and 532 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:41,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:41,344 INFO L93 Difference]: Finished difference Result 322 states and 671 transitions. [2022-01-28 14:32:41,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:32:41,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:32:41,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:41,345 INFO L225 Difference]: With dead ends: 322 [2022-01-28 14:32:41,345 INFO L226 Difference]: Without dead ends: 316 [2022-01-28 14:32:41,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:32:41,346 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 77 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:41,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 25 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:41,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-28 14:32:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 207. [2022-01-28 14:32:41,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.2718446601941746) internal successors, (468), 206 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 468 transitions. [2022-01-28 14:32:41,350 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 468 transitions. Word has length 20 [2022-01-28 14:32:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:41,350 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 468 transitions. [2022-01-28 14:32:41,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 468 transitions. [2022-01-28 14:32:41,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:41,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:41,351 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:41,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:41,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-28 14:32:41,551 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:41,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:41,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1019437006, now seen corresponding path program 23 times [2022-01-28 14:32:41,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:41,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417114785] [2022-01-28 14:32:41,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:41,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:41,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:41,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417114785] [2022-01-28 14:32:41,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417114785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:41,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684521702] [2022-01-28 14:32:41,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:32:41,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:41,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:41,581 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) [2022-01-28 14:32:41,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-28 14:32:41,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:41,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:41,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:41,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-28 14:32:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:41,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:41,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684521702] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:41,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:41,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-28 14:32:41,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268859669] [2022-01-28 14:32:41,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:41,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 14:32:41,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:41,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 14:32:41,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:32:41,698 INFO L87 Difference]: Start difference. First operand 207 states and 468 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:41,819 INFO L93 Difference]: Finished difference Result 278 states and 577 transitions. [2022-01-28 14:32:41,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:32:41,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:32:41,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:41,820 INFO L225 Difference]: With dead ends: 278 [2022-01-28 14:32:41,820 INFO L226 Difference]: Without dead ends: 269 [2022-01-28 14:32:41,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-28 14:32:41,820 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 59 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:41,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 24 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:41,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-28 14:32:41,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 210. [2022-01-28 14:32:41,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2679425837320575) internal successors, (474), 209 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 474 transitions. [2022-01-28 14:32:41,824 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 474 transitions. Word has length 20 [2022-01-28 14:32:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:41,824 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 474 transitions. [2022-01-28 14:32:41,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:41,824 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 474 transitions. [2022-01-28 14:32:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:41,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:41,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:41,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:42,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:42,040 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:42,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:42,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1223925326, now seen corresponding path program 24 times [2022-01-28 14:32:42,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:42,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795109063] [2022-01-28 14:32:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:42,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:42,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:42,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795109063] [2022-01-28 14:32:42,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795109063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:42,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961385909] [2022-01-28 14:32:42,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:32:42,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:42,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:42,085 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) [2022-01-28 14:32:42,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-28 14:32:42,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:32:42,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:42,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:42,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:42,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:42,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961385909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:42,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:42,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-28 14:32:42,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548746287] [2022-01-28 14:32:42,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:42,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 14:32:42,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:42,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 14:32:42,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:32:42,176 INFO L87 Difference]: Start difference. First operand 210 states and 474 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:42,266 INFO L93 Difference]: Finished difference Result 254 states and 535 transitions. [2022-01-28 14:32:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:32:42,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:32:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:42,286 INFO L225 Difference]: With dead ends: 254 [2022-01-28 14:32:42,286 INFO L226 Difference]: Without dead ends: 245 [2022-01-28 14:32:42,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-01-28 14:32:42,286 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:42,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 21 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:42,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-28 14:32:42,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 209. [2022-01-28 14:32:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2451923076923075) internal successors, (467), 208 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 467 transitions. [2022-01-28 14:32:42,291 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 467 transitions. Word has length 20 [2022-01-28 14:32:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:42,291 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 467 transitions. [2022-01-28 14:32:42,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 467 transitions. [2022-01-28 14:32:42,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:42,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:42,292 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:42,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:42,503 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,SelfDestructingSolverStorable27 [2022-01-28 14:32:42,503 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:42,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:42,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1372633952, now seen corresponding path program 25 times [2022-01-28 14:32:42,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:42,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712312971] [2022-01-28 14:32:42,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:42,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:42,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:42,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712312971] [2022-01-28 14:32:42,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712312971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:42,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068514666] [2022-01-28 14:32:42,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:32:42,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:42,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:42,534 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) [2022-01-28 14:32:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:42,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:42,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:42,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-28 14:32:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:42,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:42,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068514666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:42,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:42,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:32:42,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736174486] [2022-01-28 14:32:42,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:42,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:32:42,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:42,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:32:42,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:32:42,624 INFO L87 Difference]: Start difference. First operand 209 states and 467 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:42,706 INFO L93 Difference]: Finished difference Result 310 states and 646 transitions. [2022-01-28 14:32:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:32:42,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:32:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:42,707 INFO L225 Difference]: With dead ends: 310 [2022-01-28 14:32:42,707 INFO L226 Difference]: Without dead ends: 307 [2022-01-28 14:32:42,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:32:42,708 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:42,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 23 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:42,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-01-28 14:32:42,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 222. [2022-01-28 14:32:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.276018099547511) internal successors, (503), 221 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:42,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 503 transitions. [2022-01-28 14:32:42,724 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 503 transitions. Word has length 20 [2022-01-28 14:32:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:42,724 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 503 transitions. [2022-01-28 14:32:42,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:42,724 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 503 transitions. [2022-01-28 14:32:42,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:42,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:42,725 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:42,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:42,940 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,SelfDestructingSolverStorable28 [2022-01-28 14:32:42,941 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:42,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:42,941 INFO L85 PathProgramCache]: Analyzing trace with hash 299506678, now seen corresponding path program 26 times [2022-01-28 14:32:42,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:42,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681000550] [2022-01-28 14:32:42,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:42,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:42,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:42,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681000550] [2022-01-28 14:32:42,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681000550] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:42,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756576973] [2022-01-28 14:32:42,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:32:42,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:42,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:42,982 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) [2022-01-28 14:32:43,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:32:43,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:43,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:43,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:43,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-28 14:32:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:43,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:43,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756576973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:43,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:43,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:32:43,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989693291] [2022-01-28 14:32:43,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:43,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:32:43,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:43,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:32:43,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:32:43,097 INFO L87 Difference]: Start difference. First operand 222 states and 503 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:43,180 INFO L93 Difference]: Finished difference Result 330 states and 707 transitions. [2022-01-28 14:32:43,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:32:43,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:32:43,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:43,181 INFO L225 Difference]: With dead ends: 330 [2022-01-28 14:32:43,181 INFO L226 Difference]: Without dead ends: 330 [2022-01-28 14:32:43,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:32:43,182 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:43,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 24 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-01-28 14:32:43,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 238. [2022-01-28 14:32:43,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.3037974683544302) internal successors, (546), 237 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 546 transitions. [2022-01-28 14:32:43,187 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 546 transitions. Word has length 20 [2022-01-28 14:32:43,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:43,187 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 546 transitions. [2022-01-28 14:32:43,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:43,188 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 546 transitions. [2022-01-28 14:32:43,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:43,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:43,188 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:43,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:43,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:43,404 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:43,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:43,405 INFO L85 PathProgramCache]: Analyzing trace with hash -189376552, now seen corresponding path program 27 times [2022-01-28 14:32:43,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:43,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428527297] [2022-01-28 14:32:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:43,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:43,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:43,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:43,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428527297] [2022-01-28 14:32:43,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428527297] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:43,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021703105] [2022-01-28 14:32:43,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:32:43,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:43,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:43,436 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) [2022-01-28 14:32:43,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-28 14:32:43,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 14:32:43,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:43,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:43,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:43,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:43,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021703105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:43,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:43,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-01-28 14:32:43,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036296282] [2022-01-28 14:32:43,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:43,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 14:32:43,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:43,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 14:32:43,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-28 14:32:43,526 INFO L87 Difference]: Start difference. First operand 238 states and 546 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:43,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:43,600 INFO L93 Difference]: Finished difference Result 322 states and 681 transitions. [2022-01-28 14:32:43,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:32:43,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:32:43,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:43,601 INFO L225 Difference]: With dead ends: 322 [2022-01-28 14:32:43,601 INFO L226 Difference]: Without dead ends: 319 [2022-01-28 14:32:43,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:32:43,602 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 64 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:43,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 21 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:43,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-28 14:32:43,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 238. [2022-01-28 14:32:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.29957805907173) internal successors, (545), 237 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 545 transitions. [2022-01-28 14:32:43,606 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 545 transitions. Word has length 20 [2022-01-28 14:32:43,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:43,606 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 545 transitions. [2022-01-28 14:32:43,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 545 transitions. [2022-01-28 14:32:43,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:43,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:43,607 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:43,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:43,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:43,823 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:43,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:43,823 INFO L85 PathProgramCache]: Analyzing trace with hash -773578702, now seen corresponding path program 28 times [2022-01-28 14:32:43,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:43,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581232082] [2022-01-28 14:32:43,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:43,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:43,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:43,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581232082] [2022-01-28 14:32:43,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581232082] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:43,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855804016] [2022-01-28 14:32:43,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:32:43,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:43,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:43,852 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) [2022-01-28 14:32:43,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-28 14:32:43,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:32:43,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:43,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:43,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:43,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:43,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855804016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:43,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:43,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-01-28 14:32:43,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709262285] [2022-01-28 14:32:43,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:43,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 14:32:43,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:43,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 14:32:43,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:32:43,948 INFO L87 Difference]: Start difference. First operand 238 states and 545 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:44,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:44,053 INFO L93 Difference]: Finished difference Result 348 states and 748 transitions. [2022-01-28 14:32:44,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:32:44,054 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:32:44,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:44,055 INFO L225 Difference]: With dead ends: 348 [2022-01-28 14:32:44,055 INFO L226 Difference]: Without dead ends: 348 [2022-01-28 14:32:44,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:32:44,055 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:44,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 28 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:44,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-28 14:32:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 224. [2022-01-28 14:32:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2645739910313902) internal successors, (505), 223 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) [2022-01-28 14:32:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 505 transitions. [2022-01-28 14:32:44,059 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 505 transitions. Word has length 20 [2022-01-28 14:32:44,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:44,059 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 505 transitions. [2022-01-28 14:32:44,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:44,060 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 505 transitions. [2022-01-28 14:32:44,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:44,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:44,060 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:44,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:44,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:44,276 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:44,277 INFO L85 PathProgramCache]: Analyzing trace with hash 348479026, now seen corresponding path program 29 times [2022-01-28 14:32:44,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:44,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544690768] [2022-01-28 14:32:44,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:44,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:44,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:44,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544690768] [2022-01-28 14:32:44,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544690768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:44,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422866945] [2022-01-28 14:32:44,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:32:44,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:44,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:44,314 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) [2022-01-28 14:32:44,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-28 14:32:44,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 14:32:44,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:44,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:44,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:44,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:44,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422866945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:44,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:44,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-01-28 14:32:44,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169456387] [2022-01-28 14:32:44,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:44,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 14:32:44,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:44,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 14:32:44,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:32:44,398 INFO L87 Difference]: Start difference. First operand 224 states and 505 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:44,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:44,468 INFO L93 Difference]: Finished difference Result 329 states and 681 transitions. [2022-01-28 14:32:44,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:32:44,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:32:44,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:44,469 INFO L225 Difference]: With dead ends: 329 [2022-01-28 14:32:44,470 INFO L226 Difference]: Without dead ends: 320 [2022-01-28 14:32:44,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-28 14:32:44,470 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 85 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:44,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 22 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:44,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-28 14:32:44,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 224. [2022-01-28 14:32:44,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2556053811659194) internal successors, (503), 223 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:44,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 503 transitions. [2022-01-28 14:32:44,473 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 503 transitions. Word has length 20 [2022-01-28 14:32:44,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:44,474 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 503 transitions. [2022-01-28 14:32:44,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:44,474 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 503 transitions. [2022-01-28 14:32:44,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:44,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:44,474 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:44,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-28 14:32:44,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:44,675 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:44,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:44,675 INFO L85 PathProgramCache]: Analyzing trace with hash 971705334, now seen corresponding path program 30 times [2022-01-28 14:32:44,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:44,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440981009] [2022-01-28 14:32:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:44,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:44,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:44,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440981009] [2022-01-28 14:32:44,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440981009] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:44,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165289927] [2022-01-28 14:32:44,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:32:44,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:44,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:44,712 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) [2022-01-28 14:32:44,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-28 14:32:44,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 14:32:44,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:44,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:44,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:44,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:44,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165289927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:44,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:44,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-28 14:32:44,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090548832] [2022-01-28 14:32:44,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:44,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 14:32:44,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 14:32:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:32:44,810 INFO L87 Difference]: Start difference. First operand 224 states and 503 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:44,917 INFO L93 Difference]: Finished difference Result 302 states and 629 transitions. [2022-01-28 14:32:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:32:44,917 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:32:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:44,918 INFO L225 Difference]: With dead ends: 302 [2022-01-28 14:32:44,918 INFO L226 Difference]: Without dead ends: 299 [2022-01-28 14:32:44,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-28 14:32:44,918 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 47 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:44,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 27 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-28 14:32:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 208. [2022-01-28 14:32:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.251207729468599) internal successors, (466), 207 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 466 transitions. [2022-01-28 14:32:44,922 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 466 transitions. Word has length 20 [2022-01-28 14:32:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:44,922 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 466 transitions. [2022-01-28 14:32:44,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 466 transitions. [2022-01-28 14:32:44,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-28 14:32:44,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:44,922 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:44,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-28 14:32:45,123 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,SelfDestructingSolverStorable33 [2022-01-28 14:32:45,123 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:45,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1875608010, now seen corresponding path program 31 times [2022-01-28 14:32:45,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:45,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125389602] [2022-01-28 14:32:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:45,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:45,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:45,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125389602] [2022-01-28 14:32:45,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125389602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:45,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048967329] [2022-01-28 14:32:45,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:32:45,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:45,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:45,161 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) [2022-01-28 14:32:45,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-28 14:32:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:45,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:45,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:45,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:45,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048967329] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:45,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:45,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-01-28 14:32:45,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761947860] [2022-01-28 14:32:45,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:45,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 14:32:45,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:45,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 14:32:45,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:32:45,239 INFO L87 Difference]: Start difference. First operand 208 states and 466 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:45,332 INFO L93 Difference]: Finished difference Result 298 states and 611 transitions. [2022-01-28 14:32:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 14:32:45,332 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-28 14:32:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:45,333 INFO L225 Difference]: With dead ends: 298 [2022-01-28 14:32:45,333 INFO L226 Difference]: Without dead ends: 283 [2022-01-28 14:32:45,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:32:45,334 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 73 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:45,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 24 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-28 14:32:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 214. [2022-01-28 14:32:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.23943661971831) internal successors, (477), 213 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 477 transitions. [2022-01-28 14:32:45,337 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 477 transitions. Word has length 20 [2022-01-28 14:32:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:45,337 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 477 transitions. [2022-01-28 14:32:45,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:45,337 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 477 transitions. [2022-01-28 14:32:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-28 14:32:45,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:45,338 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:45,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:45,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:45,553 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:45,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:45,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2067147052, now seen corresponding path program 32 times [2022-01-28 14:32:45,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:45,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193670920] [2022-01-28 14:32:45,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:45,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:45,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:45,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193670920] [2022-01-28 14:32:45,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193670920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:45,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556208565] [2022-01-28 14:32:45,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:32:45,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:45,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:45,600 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) [2022-01-28 14:32:45,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:32:45,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:45,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 14:32:45,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:45,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-28 14:32:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:45,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:45,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556208565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:45,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:45,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 12 [2022-01-28 14:32:45,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090938252] [2022-01-28 14:32:45,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:45,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 14:32:45,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:45,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 14:32:45,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:32:45,897 INFO L87 Difference]: Start difference. First operand 214 states and 477 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2022-01-28 14:32:46,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:46,086 INFO L93 Difference]: Finished difference Result 359 states and 739 transitions. [2022-01-28 14:32:46,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 14:32:46,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 22 [2022-01-28 14:32:46,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:46,088 INFO L225 Difference]: With dead ends: 359 [2022-01-28 14:32:46,088 INFO L226 Difference]: Without dead ends: 329 [2022-01-28 14:32:46,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-01-28 14:32:46,088 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 132 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:46,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 72 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-28 14:32:46,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 246. [2022-01-28 14:32:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.216326530612245) internal successors, (543), 245 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 543 transitions. [2022-01-28 14:32:46,093 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 543 transitions. Word has length 22 [2022-01-28 14:32:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:46,093 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 543 transitions. [2022-01-28 14:32:46,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2022-01-28 14:32:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 543 transitions. [2022-01-28 14:32:46,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-28 14:32:46,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:46,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:46,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:46,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:46,310 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:46,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1673184418, now seen corresponding path program 33 times [2022-01-28 14:32:46,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:46,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574933188] [2022-01-28 14:32:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:46,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:32:46,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:46,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574933188] [2022-01-28 14:32:46,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574933188] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:46,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989784577] [2022-01-28 14:32:46,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:32:46,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:46,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:46,380 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) [2022-01-28 14:32:46,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 14:32:46,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:46,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:46,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:46,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-28 14:32:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-28 14:32:46,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-28 14:32:46,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989784577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:46,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:46,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-01-28 14:32:46,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591857613] [2022-01-28 14:32:46,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:46,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 14:32:46,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:46,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 14:32:46,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-28 14:32:46,607 INFO L87 Difference]: Start difference. First operand 246 states and 543 transitions. Second operand has 15 states, 14 states have (on average 3.142857142857143) 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) [2022-01-28 14:32:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:47,003 INFO L93 Difference]: Finished difference Result 471 states and 971 transitions. [2022-01-28 14:32:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 14:32:47,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.142857142857143) 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 22 [2022-01-28 14:32:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:47,004 INFO L225 Difference]: With dead ends: 471 [2022-01-28 14:32:47,004 INFO L226 Difference]: Without dead ends: 426 [2022-01-28 14:32:47,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2022-01-28 14:32:47,005 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 214 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:47,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 99 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 14:32:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-01-28 14:32:47,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 290. [2022-01-28 14:32:47,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.13840830449827) internal successors, (618), 289 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 618 transitions. [2022-01-28 14:32:47,009 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 618 transitions. Word has length 22 [2022-01-28 14:32:47,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:47,009 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 618 transitions. [2022-01-28 14:32:47,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.142857142857143) 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) [2022-01-28 14:32:47,010 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 618 transitions. [2022-01-28 14:32:47,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-28 14:32:47,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:47,010 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:47,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-28 14:32:47,223 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,SelfDestructingSolverStorable36 [2022-01-28 14:32:47,223 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:47,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:47,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1350863530, now seen corresponding path program 34 times [2022-01-28 14:32:47,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:47,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466734631] [2022-01-28 14:32:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:47,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:32:47,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:47,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466734631] [2022-01-28 14:32:47,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466734631] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:47,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479243877] [2022-01-28 14:32:47,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:32:47,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:47,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:47,270 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) [2022-01-28 14:32:47,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-28 14:32:47,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:32:47,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:47,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-28 14:32:47,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:32:47,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:32:47,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479243877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:47,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:47,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-28 14:32:47,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908393595] [2022-01-28 14:32:47,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:47,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:32:47,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:47,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:32:47,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:32:47,413 INFO L87 Difference]: Start difference. First operand 290 states and 618 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:47,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:47,490 INFO L93 Difference]: Finished difference Result 426 states and 886 transitions. [2022-01-28 14:32:47,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 14:32:47,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-28 14:32:47,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:47,492 INFO L225 Difference]: With dead ends: 426 [2022-01-28 14:32:47,492 INFO L226 Difference]: Without dead ends: 417 [2022-01-28 14:32:47,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:32:47,493 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:47,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 41 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:47,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-01-28 14:32:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 357. [2022-01-28 14:32:47,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.1797752808988764) internal successors, (776), 356 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:47,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 776 transitions. [2022-01-28 14:32:47,499 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 776 transitions. Word has length 22 [2022-01-28 14:32:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:47,499 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 776 transitions. [2022-01-28 14:32:47,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 776 transitions. [2022-01-28 14:32:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-28 14:32:47,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:47,500 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:47,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:47,716 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,SelfDestructingSolverStorable37 [2022-01-28 14:32:47,716 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:47,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:47,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1881476522, now seen corresponding path program 35 times [2022-01-28 14:32:47,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:47,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703757758] [2022-01-28 14:32:47,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:47,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:32:47,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:47,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703757758] [2022-01-28 14:32:47,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703757758] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:47,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115633805] [2022-01-28 14:32:47,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:32:47,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:47,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:47,750 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) [2022-01-28 14:32:47,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-28 14:32:47,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 14:32:47,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:47,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-28 14:32:47,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:32:47,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 14:32:47,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115633805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:47,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:47,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-01-28 14:32:47,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359961883] [2022-01-28 14:32:47,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:47,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 14:32:47,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:47,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 14:32:47,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:32:47,869 INFO L87 Difference]: Start difference. First operand 357 states and 776 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:47,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:47,920 INFO L93 Difference]: Finished difference Result 477 states and 1004 transitions. [2022-01-28 14:32:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 14:32:47,921 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-28 14:32:47,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:47,922 INFO L225 Difference]: With dead ends: 477 [2022-01-28 14:32:47,922 INFO L226 Difference]: Without dead ends: 468 [2022-01-28 14:32:47,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-28 14:32:47,922 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:47,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 36 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:32:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-28 14:32:47,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 408. [2022-01-28 14:32:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.1965601965601964) internal successors, (894), 407 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 894 transitions. [2022-01-28 14:32:47,928 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 894 transitions. Word has length 22 [2022-01-28 14:32:47,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:47,928 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 894 transitions. [2022-01-28 14:32:47,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:47,928 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 894 transitions. [2022-01-28 14:32:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:32:47,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:47,929 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:47,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:48,145 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,SelfDestructingSolverStorable38 [2022-01-28 14:32:48,145 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:48,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:48,145 INFO L85 PathProgramCache]: Analyzing trace with hash -570097848, now seen corresponding path program 36 times [2022-01-28 14:32:48,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:48,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602977475] [2022-01-28 14:32:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:48,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:48,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:48,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602977475] [2022-01-28 14:32:48,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602977475] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:48,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121342754] [2022-01-28 14:32:48,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:32:48,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:48,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:48,181 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) [2022-01-28 14:32:48,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-28 14:32:48,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:32:48,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:48,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-28 14:32:48,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:48,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:48,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121342754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:48,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:48,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-01-28 14:32:48,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108780045] [2022-01-28 14:32:48,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:48,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 14:32:48,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:48,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 14:32:48,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-28 14:32:48,266 INFO L87 Difference]: Start difference. First operand 408 states and 894 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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) [2022-01-28 14:32:48,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:48,372 INFO L93 Difference]: Finished difference Result 512 states and 1072 transitions. [2022-01-28 14:32:48,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:32:48,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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 24 [2022-01-28 14:32:48,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:48,374 INFO L225 Difference]: With dead ends: 512 [2022-01-28 14:32:48,374 INFO L226 Difference]: Without dead ends: 512 [2022-01-28 14:32:48,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2022-01-28 14:32:48,374 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:48,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 64 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:48,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-28 14:32:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 402. [2022-01-28 14:32:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.199501246882793) internal successors, (882), 401 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 882 transitions. [2022-01-28 14:32:48,398 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 882 transitions. Word has length 24 [2022-01-28 14:32:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:48,398 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 882 transitions. [2022-01-28 14:32:48,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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) [2022-01-28 14:32:48,399 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 882 transitions. [2022-01-28 14:32:48,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:32:48,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:48,399 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:48,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:48,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-28 14:32:48,609 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:48,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:48,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1395949260, now seen corresponding path program 37 times [2022-01-28 14:32:48,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:48,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984422974] [2022-01-28 14:32:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:48,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:48,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:48,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984422974] [2022-01-28 14:32:48,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984422974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:48,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820335998] [2022-01-28 14:32:48,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 14:32:48,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:48,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:48,649 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) [2022-01-28 14:32:48,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-28 14:32:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:48,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-28 14:32:48,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:48,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:48,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820335998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:48,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:48,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-28 14:32:48,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863010460] [2022-01-28 14:32:48,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:48,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 14:32:48,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:48,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 14:32:48,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:32:48,822 INFO L87 Difference]: Start difference. First operand 402 states and 882 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2022-01-28 14:32:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:48,887 INFO L93 Difference]: Finished difference Result 418 states and 902 transitions. [2022-01-28 14:32:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:32:48,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 24 [2022-01-28 14:32:48,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:48,888 INFO L225 Difference]: With dead ends: 418 [2022-01-28 14:32:48,888 INFO L226 Difference]: Without dead ends: 415 [2022-01-28 14:32:48,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-28 14:32:48,891 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:48,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 19 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-28 14:32:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 402. [2022-01-28 14:32:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.197007481296758) internal successors, (881), 401 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 881 transitions. [2022-01-28 14:32:48,896 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 881 transitions. Word has length 24 [2022-01-28 14:32:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:48,896 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 881 transitions. [2022-01-28 14:32:48,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2022-01-28 14:32:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 881 transitions. [2022-01-28 14:32:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:32:48,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:48,897 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:48,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:49,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:49,113 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:49,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:49,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1328082766, now seen corresponding path program 38 times [2022-01-28 14:32:49,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:49,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353711855] [2022-01-28 14:32:49,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:49,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:49,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:49,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353711855] [2022-01-28 14:32:49,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353711855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:49,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799550817] [2022-01-28 14:32:49,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 14:32:49,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:49,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:49,149 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) [2022-01-28 14:32:49,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-28 14:32:49,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 14:32:49,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:49,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-28 14:32:49,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:49,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:49,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799550817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:49,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:49,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-01-28 14:32:49,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934295977] [2022-01-28 14:32:49,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:49,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 14:32:49,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:49,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 14:32:49,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-28 14:32:49,242 INFO L87 Difference]: Start difference. First operand 402 states and 881 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) [2022-01-28 14:32:49,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:49,363 INFO L93 Difference]: Finished difference Result 588 states and 1220 transitions. [2022-01-28 14:32:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 14:32:49,364 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 24 [2022-01-28 14:32:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:49,365 INFO L225 Difference]: With dead ends: 588 [2022-01-28 14:32:49,365 INFO L226 Difference]: Without dead ends: 588 [2022-01-28 14:32:49,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-01-28 14:32:49,366 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 82 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:49,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 25 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:49,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-01-28 14:32:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 360. [2022-01-28 14:32:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.161559888579387) internal successors, (776), 359 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 776 transitions. [2022-01-28 14:32:49,371 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 776 transitions. Word has length 24 [2022-01-28 14:32:49,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:49,371 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 776 transitions. [2022-01-28 14:32:49,371 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) [2022-01-28 14:32:49,372 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 776 transitions. [2022-01-28 14:32:49,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:32:49,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:49,372 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:49,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:49,572 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,SelfDestructingSolverStorable41 [2022-01-28 14:32:49,573 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:49,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:49,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1286137202, now seen corresponding path program 39 times [2022-01-28 14:32:49,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:49,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524191760] [2022-01-28 14:32:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:49,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:49,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:49,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524191760] [2022-01-28 14:32:49,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524191760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:49,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786873594] [2022-01-28 14:32:49,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 14:32:49,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:49,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:49,612 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) [2022-01-28 14:32:49,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-28 14:32:49,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-28 14:32:49,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:49,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:49,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-28 14:32:49,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-28 14:32:49,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786873594] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 14:32:49,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-28 14:32:49,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2022-01-28 14:32:49,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616399597] [2022-01-28 14:32:49,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 14:32:49,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 14:32:49,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:49,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 14:32:49,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-28 14:32:49,712 INFO L87 Difference]: Start difference. First operand 360 states and 776 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:49,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:49,763 INFO L93 Difference]: Finished difference Result 437 states and 916 transitions. [2022-01-28 14:32:49,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 14:32:49,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 14:32:49,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:49,764 INFO L225 Difference]: With dead ends: 437 [2022-01-28 14:32:49,764 INFO L226 Difference]: Without dead ends: 329 [2022-01-28 14:32:49,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-28 14:32:49,765 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:49,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 20 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 14:32:49,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-28 14:32:49,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 291. [2022-01-28 14:32:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.093103448275862) internal successors, (607), 290 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 607 transitions. [2022-01-28 14:32:49,769 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 607 transitions. Word has length 24 [2022-01-28 14:32:49,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:49,769 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 607 transitions. [2022-01-28 14:32:49,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:49,769 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 607 transitions. [2022-01-28 14:32:49,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:32:49,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:49,769 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:49,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:49,972 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,SelfDestructingSolverStorable42 [2022-01-28 14:32:49,973 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:49,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:49,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1776796524, now seen corresponding path program 40 times [2022-01-28 14:32:49,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:49,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619525955] [2022-01-28 14:32:49,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:49,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 14:32:50,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:50,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619525955] [2022-01-28 14:32:50,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619525955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:50,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250656571] [2022-01-28 14:32:50,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 14:32:50,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:50,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:50,020 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) [2022-01-28 14:32:50,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-28 14:32:50,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 14:32:50,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:50,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-28 14:32:50,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:50,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:50,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250656571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:50,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:50,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-28 14:32:50,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802455952] [2022-01-28 14:32:50,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:50,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 14:32:50,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:50,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 14:32:50,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:32:50,164 INFO L87 Difference]: Start difference. First operand 291 states and 607 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2022-01-28 14:32:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:50,278 INFO L93 Difference]: Finished difference Result 391 states and 780 transitions. [2022-01-28 14:32:50,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:32:50,278 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 24 [2022-01-28 14:32:50,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:50,280 INFO L225 Difference]: With dead ends: 391 [2022-01-28 14:32:50,280 INFO L226 Difference]: Without dead ends: 391 [2022-01-28 14:32:50,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-01-28 14:32:50,282 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 55 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:50,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 28 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:50,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-01-28 14:32:50,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 283. [2022-01-28 14:32:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.0886524822695036) internal successors, (589), 282 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 589 transitions. [2022-01-28 14:32:50,286 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 589 transitions. Word has length 24 [2022-01-28 14:32:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:50,286 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 589 transitions. [2022-01-28 14:32:50,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2022-01-28 14:32:50,286 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 589 transitions. [2022-01-28 14:32:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:32:50,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:50,286 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:50,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-28 14:32:50,502 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,SelfDestructingSolverStorable43 [2022-01-28 14:32:50,502 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:50,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:50,502 INFO L85 PathProgramCache]: Analyzing trace with hash -2035373036, now seen corresponding path program 41 times [2022-01-28 14:32:50,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:50,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217469612] [2022-01-28 14:32:50,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:50,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:50,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:50,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217469612] [2022-01-28 14:32:50,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217469612] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:50,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423064694] [2022-01-28 14:32:50,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 14:32:50,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:50,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:50,534 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) [2022-01-28 14:32:50,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-28 14:32:50,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:50,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-28 14:32:50,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:50,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-28 14:32:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:50,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:50,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423064694] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:50,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:50,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-01-28 14:32:50,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636142168] [2022-01-28 14:32:50,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:50,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 14:32:50,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:50,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 14:32:50,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-28 14:32:50,635 INFO L87 Difference]: Start difference. First operand 283 states and 589 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2022-01-28 14:32:50,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:50,713 INFO L93 Difference]: Finished difference Result 374 states and 754 transitions. [2022-01-28 14:32:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 14:32:50,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 24 [2022-01-28 14:32:50,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:50,715 INFO L225 Difference]: With dead ends: 374 [2022-01-28 14:32:50,715 INFO L226 Difference]: Without dead ends: 371 [2022-01-28 14:32:50,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-01-28 14:32:50,717 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 60 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:50,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 15 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:50,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-01-28 14:32:50,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 306. [2022-01-28 14:32:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.1049180327868853) internal successors, (642), 305 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:50,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 642 transitions. [2022-01-28 14:32:50,721 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 642 transitions. Word has length 24 [2022-01-28 14:32:50,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:50,721 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 642 transitions. [2022-01-28 14:32:50,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2022-01-28 14:32:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 642 transitions. [2022-01-28 14:32:50,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 14:32:50,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 14:32:50,721 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 14:32:50,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:50,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:50,934 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-28 14:32:50,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 14:32:50,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1186508880, now seen corresponding path program 42 times [2022-01-28 14:32:50,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 14:32:50,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783220658] [2022-01-28 14:32:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 14:32:50,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 14:32:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 14:32:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 14:32:50,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 14:32:50,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783220658] [2022-01-28 14:32:50,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783220658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 14:32:50,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379466281] [2022-01-28 14:32:50,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 14:32:50,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:50,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 14:32:50,979 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) [2022-01-28 14:32:50,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-28 14:32:50,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 14:32:50,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 14:32:50,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 14:32:50,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 14:32:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-28 14:32:51,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 14:32:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-28 14:32:51,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379466281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 14:32:51,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 14:32:51,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-01-28 14:32:51,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092049034] [2022-01-28 14:32:51,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 14:32:51,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 14:32:51,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 14:32:51,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 14:32:51,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-01-28 14:32:51,194 INFO L87 Difference]: Start difference. First operand 306 states and 642 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2022-01-28 14:32:51,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 14:32:51,383 INFO L93 Difference]: Finished difference Result 319 states and 664 transitions. [2022-01-28 14:32:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 14:32:51,383 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 24 [2022-01-28 14:32:51,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 14:32:51,384 INFO L225 Difference]: With dead ends: 319 [2022-01-28 14:32:51,384 INFO L226 Difference]: Without dead ends: 0 [2022-01-28 14:32:51,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=745, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 14:32:51,384 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 125 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 14:32:51,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 22 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 14:32:51,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-28 14:32:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-28 14:32:51,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 14:32:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-28 14:32:51,385 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2022-01-28 14:32:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 14:32:51,385 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-28 14:32:51,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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) [2022-01-28 14:32:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-28 14:32:51,385 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-28 14:32:51,387 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-28 14:32:51,387 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-28 14:32:51,387 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-28 14:32:51,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-28 14:32:51,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 14:32:51,606 INFO L732 BasicCegarLoop]: Path program histogram: [42, 2, 1, 1] [2022-01-28 14:32:51,608 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-28 14:32:51,608 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-28 14:32:51,611 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 02:32:51 BasicIcfg [2022-01-28 14:32:51,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-28 14:32:51,611 INFO L158 Benchmark]: Toolchain (without parser) took 21333.93ms. Allocated memory was 207.6MB in the beginning and 350.2MB in the end (delta: 142.6MB). Free memory was 168.4MB in the beginning and 131.0MB in the end (delta: 37.4MB). Peak memory consumption was 181.5MB. Max. memory is 8.0GB. [2022-01-28 14:32:51,611 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 207.6MB. Free memory is still 169.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 14:32:51,611 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.96ms. Allocated memory is still 207.6MB. Free memory was 168.3MB in the beginning and 166.8MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-01-28 14:32:51,611 INFO L158 Benchmark]: Boogie Preprocessor took 12.05ms. Allocated memory is still 207.6MB. Free memory was 166.8MB in the beginning and 165.9MB in the end (delta: 890.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-28 14:32:51,611 INFO L158 Benchmark]: RCFGBuilder took 173.60ms. Allocated memory is still 207.6MB. Free memory was 165.9MB in the beginning and 157.6MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-01-28 14:32:51,612 INFO L158 Benchmark]: TraceAbstraction took 21123.77ms. Allocated memory was 207.6MB in the beginning and 350.2MB in the end (delta: 142.6MB). Free memory was 157.2MB in the beginning and 131.0MB in the end (delta: 26.2MB). Peak memory consumption was 168.9MB. Max. memory is 8.0GB. [2022-01-28 14:32:51,613 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 207.6MB. Free memory is still 169.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.96ms. Allocated memory is still 207.6MB. Free memory was 168.3MB in the beginning and 166.8MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.05ms. Allocated memory is still 207.6MB. Free memory was 166.8MB in the beginning and 165.9MB in the end (delta: 890.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 173.60ms. Allocated memory is still 207.6MB. Free memory was 165.9MB in the beginning and 157.6MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 21123.77ms. Allocated memory was 207.6MB in the beginning and 350.2MB in the end (delta: 142.6MB). Free memory was 157.2MB in the beginning and 131.0MB in the end (delta: 26.2MB). Peak memory consumption was 168.9MB. 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 - PositiveResult [Line: 24]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 21.1s, OverallIterations: 46, TraceHistogramMax: 4, PathProgramHistogramMax: 42, EmptinessCheckTime: 0.0s, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2841 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2841 mSDsluCounter, 1258 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2966 mSDsCounter, 668 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6577 IncrementalHoareTripleChecker+Invalid, 7245 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 668 mSolverCounterUnsat, 334 mSDtfsCounter, 6577 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2034 GetRequests, 1486 SyntacticMatches, 87 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=408occurred in iteration=39, InterpolantAutomatonStates: 483, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 46 MinimizatonAttempts, 3323 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 1680 NumberOfCodeBlocks, 1666 NumberOfCodeBlocksAsserted, 160 NumberOfCheckSat, 2343 ConstructedInterpolants, 0 QuantifiedInterpolants, 8853 SizeOfPredicates, 75 NumberOfNonLiveVariables, 1287 ConjunctsInSsa, 318 ConjunctsInUnsatCore, 129 InterpolantComputations, 5 PerfectInterpolantSequences, 684/1575 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-28 14:32:51,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...