/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-15 13:06:37,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 13:06:37,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 13:06:37,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 13:06:37,296 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 [2022-02-15 13:06:37,321 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 13:06:37,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 13:06:37,322 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-15 13:06:37,322 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-15 13:06:37,322 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-15 13:06:37,322 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-15 13:06:37,323 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-15 13:06:37,323 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-15 13:06:37,323 INFO L138 SettingsManager]: * Use SBE=true [2022-02-15 13:06:37,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 13:06:37,324 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 13:06:37,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 13:06:37,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 13:06:37,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 13:06:37,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 13:06:37,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 13:06:37,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 13:06:37,324 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 13:06:37,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 13:06:37,324 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 13:06:37,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 13:06:37,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 13:06:37,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 13:06:37,325 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 13:06:37,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 13:06:37,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:06:37,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 13:06:37,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-15 13:06:37,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-15 13:06:37,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-15 13:06:37,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-15 13:06:37,326 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-15 13:06:37,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 13:06:37,326 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-15 13:06:37,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 13:06:37,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 13:06:37,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 13:06:37,527 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-15 13:06:37,528 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-15 13:06:37,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl [2022-02-15 13:06:37,529 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl' [2022-02-15 13:06:37,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 13:06:37,545 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 13:06:37,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-15 13:06:37,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-15 13:06:37,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-15 13:06:37,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:37" (1/1) ... [2022-02-15 13:06:37,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:37" (1/1) ... [2022-02-15 13:06:37,570 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-15 13:06:37,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-15 13:06:37,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 13:06:37,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 13:06:37,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 13:06:37,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:37" (1/1) ... [2022-02-15 13:06:37,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:37" (1/1) ... [2022-02-15 13:06:37,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:37" (1/1) ... [2022-02-15 13:06:37,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:37" (1/1) ... [2022-02-15 13:06:37,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:37" (1/1) ... [2022-02-15 13:06:37,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:37" (1/1) ... [2022-02-15 13:06:37,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:37" (1/1) ... [2022-02-15 13:06:37,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 13:06:37,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 13:06:37,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 13:06:37,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 13:06:37,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:37" (1/1) ... [2022-02-15 13:06:37,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:06:37,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:37,604 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) [2022-02-15 13:06:37,606 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 [2022-02-15 13:06:37,628 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-15 13:06:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-15 13:06:37,629 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-15 13:06:37,629 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-15 13:06:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-15 13:06:37,629 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-15 13:06:37,629 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-15 13:06:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 13:06:37,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 13:06:37,629 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-15 13:06:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-15 13:06:37,629 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-15 13:06:37,630 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-15 13:06:37,663 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 13:06:37,664 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 13:06:37,727 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 13:06:37,736 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 13:06:37,736 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-15 13:06:37,737 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:06:37 BoogieIcfgContainer [2022-02-15 13:06:37,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 13:06:37,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 13:06:37,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 13:06:37,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 13:06:37,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:06:37" (1/2) ... [2022-02-15 13:06:37,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798ecb7a and model type mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:06:37, skipping insertion in model container [2022-02-15 13:06:37,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:06:37" (2/2) ... [2022-02-15 13:06:37,742 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.bpl [2022-02-15 13:06:37,745 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-15 13:06:37,745 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-15 13:06:37,746 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 13:06:37,746 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-15 13:06:37,787 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-15 13:06:37,840 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 13:06:37,845 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-15 13:06:37,845 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-15 13:06:37,852 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2022-02-15 13:06:37,888 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:37,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:37,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 13:06:37,903 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:37,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:37,904 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:37,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:37,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1698271758, now seen corresponding path program 1 times [2022-02-15 13:06:37,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:37,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136475336] [2022-02-15 13:06:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:37,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:38,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:38,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136475336] [2022-02-15 13:06:38,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136475336] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:38,107 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:38,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-15 13:06:38,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503728049] [2022-02-15 13:06:38,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:38,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 13:06:38,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:38,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 13:06:38,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 13:06:38,136 INFO L87 Difference]: Start difference. First operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:38,170 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2022-02-15 13:06:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 13:06:38,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-15 13:06:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:38,188 INFO L225 Difference]: With dead ends: 214 [2022-02-15 13:06:38,188 INFO L226 Difference]: Without dead ends: 199 [2022-02-15 13:06:38,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 13:06:38,228 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:38,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-02-15 13:06:38,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2022-02-15 13:06:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2022-02-15 13:06:38,320 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2022-02-15 13:06:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:38,320 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2022-02-15 13:06:38,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:38,321 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2022-02-15 13:06:38,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:38,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:38,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:38,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 13:06:38,322 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:38,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:38,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1717700848, now seen corresponding path program 1 times [2022-02-15 13:06:38,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:38,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678254058] [2022-02-15 13:06:38,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:38,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:38,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:38,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678254058] [2022-02-15 13:06:38,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678254058] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:38,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025265846] [2022-02-15 13:06:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:38,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:38,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:38,466 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) [2022-02-15 13:06:38,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-15 13:06:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:38,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-15 13:06:38,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:38,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:38,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025265846] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:38,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:38,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-02-15 13:06:38,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587513471] [2022-02-15 13:06:38,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:38,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 13:06:38,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:38,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 13:06:38,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:06:38,651 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:38,810 INFO L93 Difference]: Finished difference Result 347 states and 967 transitions. [2022-02-15 13:06:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:06:38,810 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:38,814 INFO L225 Difference]: With dead ends: 347 [2022-02-15 13:06:38,814 INFO L226 Difference]: Without dead ends: 347 [2022-02-15 13:06:38,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:38,818 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:38,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 51 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-02-15 13:06:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 173. [2022-02-15 13:06:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 3.0) internal successors, (516), 172 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 516 transitions. [2022-02-15 13:06:38,845 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 516 transitions. Word has length 17 [2022-02-15 13:06:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:38,846 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 516 transitions. [2022-02-15 13:06:38,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 516 transitions. [2022-02-15 13:06:38,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:38,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:38,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:38,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-15 13:06:39,066 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 [2022-02-15 13:06:39,066 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:39,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:39,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1520327342, now seen corresponding path program 1 times [2022-02-15 13:06:39,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:39,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416700949] [2022-02-15 13:06:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:39,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:39,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:39,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416700949] [2022-02-15 13:06:39,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416700949] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:39,112 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:39,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 13:06:39,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456578693] [2022-02-15 13:06:39,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:39,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:06:39,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:06:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:39,117 INFO L87 Difference]: Start difference. First operand 173 states and 516 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:39,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:39,202 INFO L93 Difference]: Finished difference Result 380 states and 1050 transitions. [2022-02-15 13:06:39,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:06:39,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:39,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:39,206 INFO L225 Difference]: With dead ends: 380 [2022-02-15 13:06:39,206 INFO L226 Difference]: Without dead ends: 380 [2022-02-15 13:06:39,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:06:39,210 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:39,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 36 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-15 13:06:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 156. [2022-02-15 13:06:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.935483870967742) internal successors, (455), 155 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 455 transitions. [2022-02-15 13:06:39,227 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 455 transitions. Word has length 17 [2022-02-15 13:06:39,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:39,228 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 455 transitions. [2022-02-15 13:06:39,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:39,228 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 455 transitions. [2022-02-15 13:06:39,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:39,231 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:39,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:39,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 13:06:39,231 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:39,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:39,233 INFO L85 PathProgramCache]: Analyzing trace with hash 388922220, now seen corresponding path program 1 times [2022-02-15 13:06:39,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:39,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668066422] [2022-02-15 13:06:39,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:39,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:39,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:39,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668066422] [2022-02-15 13:06:39,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668066422] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:39,281 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:39,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 13:06:39,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977620765] [2022-02-15 13:06:39,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:39,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:06:39,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:39,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:06:39,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:39,282 INFO L87 Difference]: Start difference. First operand 156 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:39,387 INFO L93 Difference]: Finished difference Result 303 states and 809 transitions. [2022-02-15 13:06:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:06:39,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:39,389 INFO L225 Difference]: With dead ends: 303 [2022-02-15 13:06:39,389 INFO L226 Difference]: Without dead ends: 292 [2022-02-15 13:06:39,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:06:39,392 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:39,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 28 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:39,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-15 13:06:39,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 177. [2022-02-15 13:06:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.8806818181818183) internal successors, (507), 176 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 507 transitions. [2022-02-15 13:06:39,400 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 507 transitions. Word has length 17 [2022-02-15 13:06:39,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:39,400 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 507 transitions. [2022-02-15 13:06:39,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 507 transitions. [2022-02-15 13:06:39,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:39,401 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:39,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:39,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 13:06:39,402 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:39,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:39,402 INFO L85 PathProgramCache]: Analyzing trace with hash 336278568, now seen corresponding path program 2 times [2022-02-15 13:06:39,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:39,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345318659] [2022-02-15 13:06:39,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:39,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:39,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:39,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345318659] [2022-02-15 13:06:39,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345318659] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:39,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995259680] [2022-02-15 13:06:39,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:39,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:39,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:39,479 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) [2022-02-15 13:06:39,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-15 13:06:39,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:39,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:39,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:06:39,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:39,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:39,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995259680] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:39,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:39,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-02-15 13:06:39,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172488552] [2022-02-15 13:06:39,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:39,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:06:39,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:39,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:06:39,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:06:39,723 INFO L87 Difference]: Start difference. First operand 177 states and 507 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:40,072 INFO L93 Difference]: Finished difference Result 443 states and 1220 transitions. [2022-02-15 13:06:40,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:06:40,072 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:40,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:40,074 INFO L225 Difference]: With dead ends: 443 [2022-02-15 13:06:40,074 INFO L226 Difference]: Without dead ends: 443 [2022-02-15 13:06:40,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:06:40,075 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 159 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:40,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 105 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:40,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-02-15 13:06:40,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 187. [2022-02-15 13:06:40,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.935483870967742) internal successors, (546), 186 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) [2022-02-15 13:06:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 546 transitions. [2022-02-15 13:06:40,082 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 546 transitions. Word has length 17 [2022-02-15 13:06:40,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:40,082 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 546 transitions. [2022-02-15 13:06:40,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,083 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 546 transitions. [2022-02-15 13:06:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:40,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:40,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:40,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:40,299 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 [2022-02-15 13:06:40,300 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:40,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:40,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1075389144, now seen corresponding path program 2 times [2022-02-15 13:06:40,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:40,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041016984] [2022-02-15 13:06:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:40,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:40,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:40,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041016984] [2022-02-15 13:06:40,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041016984] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:40,322 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:40,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 13:06:40,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695029399] [2022-02-15 13:06:40,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:40,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 13:06:40,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:40,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 13:06:40,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:06:40,323 INFO L87 Difference]: Start difference. First operand 187 states and 546 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:40,374 INFO L93 Difference]: Finished difference Result 287 states and 800 transitions. [2022-02-15 13:06:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:06:40,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:40,375 INFO L225 Difference]: With dead ends: 287 [2022-02-15 13:06:40,375 INFO L226 Difference]: Without dead ends: 283 [2022-02-15 13:06:40,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:40,376 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:40,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 18 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-02-15 13:06:40,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 193. [2022-02-15 13:06:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.890625) internal successors, (555), 192 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 555 transitions. [2022-02-15 13:06:40,382 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 555 transitions. Word has length 17 [2022-02-15 13:06:40,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:40,382 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 555 transitions. [2022-02-15 13:06:40,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 555 transitions. [2022-02-15 13:06:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:40,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:40,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:40,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 13:06:40,383 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:40,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:40,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1208261484, now seen corresponding path program 3 times [2022-02-15 13:06:40,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:40,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062150634] [2022-02-15 13:06:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:40,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:40,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:40,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062150634] [2022-02-15 13:06:40,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062150634] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:40,410 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:40,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 13:06:40,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831187993] [2022-02-15 13:06:40,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:40,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:06:40,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:40,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:06:40,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:40,411 INFO L87 Difference]: Start difference. First operand 193 states and 555 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:40,486 INFO L93 Difference]: Finished difference Result 255 states and 706 transitions. [2022-02-15 13:06:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:06:40,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:40,488 INFO L225 Difference]: With dead ends: 255 [2022-02-15 13:06:40,488 INFO L226 Difference]: Without dead ends: 244 [2022-02-15 13:06:40,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:06:40,488 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:40,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 26 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:40,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-02-15 13:06:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 196. [2022-02-15 13:06:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.876923076923077) internal successors, (561), 195 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 561 transitions. [2022-02-15 13:06:40,494 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 561 transitions. Word has length 17 [2022-02-15 13:06:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:40,494 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 561 transitions. [2022-02-15 13:06:40,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 561 transitions. [2022-02-15 13:06:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:40,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:40,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:40,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 13:06:40,495 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:40,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:40,495 INFO L85 PathProgramCache]: Analyzing trace with hash 830951980, now seen corresponding path program 4 times [2022-02-15 13:06:40,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:40,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851344630] [2022-02-15 13:06:40,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:40,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:40,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:40,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851344630] [2022-02-15 13:06:40,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851344630] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:40,529 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:40,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 13:06:40,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353973405] [2022-02-15 13:06:40,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:40,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:06:40,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:40,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:06:40,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:40,529 INFO L87 Difference]: Start difference. First operand 196 states and 561 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:40,602 INFO L93 Difference]: Finished difference Result 247 states and 705 transitions. [2022-02-15 13:06:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:06:40,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:40,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:40,603 INFO L225 Difference]: With dead ends: 247 [2022-02-15 13:06:40,603 INFO L226 Difference]: Without dead ends: 247 [2022-02-15 13:06:40,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:06:40,604 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:40,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 31 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:40,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-02-15 13:06:40,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 199. [2022-02-15 13:06:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.8737373737373737) internal successors, (569), 198 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) [2022-02-15 13:06:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 569 transitions. [2022-02-15 13:06:40,626 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 569 transitions. Word has length 17 [2022-02-15 13:06:40,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:40,626 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 569 transitions. [2022-02-15 13:06:40,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,626 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 569 transitions. [2022-02-15 13:06:40,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:40,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:40,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:40,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 13:06:40,627 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:40,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:40,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1765137624, now seen corresponding path program 5 times [2022-02-15 13:06:40,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:40,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436787931] [2022-02-15 13:06:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:40,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:40,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:40,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436787931] [2022-02-15 13:06:40,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436787931] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:40,681 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:40,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:06:40,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864306152] [2022-02-15 13:06:40,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:40,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:06:40,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:40,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:06:40,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:06:40,682 INFO L87 Difference]: Start difference. First operand 199 states and 569 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) [2022-02-15 13:06:40,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:40,795 INFO L93 Difference]: Finished difference Result 259 states and 737 transitions. [2022-02-15 13:06:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:06:40,795 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 17 [2022-02-15 13:06:40,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:40,796 INFO L225 Difference]: With dead ends: 259 [2022-02-15 13:06:40,796 INFO L226 Difference]: Without dead ends: 259 [2022-02-15 13:06:40,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:06:40,798 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:40,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 38 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:40,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-02-15 13:06:40,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 202. [2022-02-15 13:06:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8855721393034828) internal successors, (580), 201 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 580 transitions. [2022-02-15 13:06:40,803 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 580 transitions. Word has length 17 [2022-02-15 13:06:40,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:40,803 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 580 transitions. [2022-02-15 13:06:40,803 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) [2022-02-15 13:06:40,803 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 580 transitions. [2022-02-15 13:06:40,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:40,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:40,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:40,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 13:06:40,804 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:40,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:40,805 INFO L85 PathProgramCache]: Analyzing trace with hash -861155856, now seen corresponding path program 2 times [2022-02-15 13:06:40,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:40,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266027280] [2022-02-15 13:06:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:40,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:40,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:40,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266027280] [2022-02-15 13:06:40,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266027280] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:06:40,843 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:06:40,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 13:06:40,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199588016] [2022-02-15 13:06:40,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:40,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 13:06:40,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:40,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 13:06:40,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:06:40,844 INFO L87 Difference]: Start difference. First operand 202 states and 580 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:40,884 INFO L93 Difference]: Finished difference Result 263 states and 750 transitions. [2022-02-15 13:06:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:06:40,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:40,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:40,885 INFO L225 Difference]: With dead ends: 263 [2022-02-15 13:06:40,885 INFO L226 Difference]: Without dead ends: 255 [2022-02-15 13:06:40,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:06:40,886 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:40,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 16 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:40,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-15 13:06:40,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 192. [2022-02-15 13:06:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.884816753926702) internal successors, (551), 191 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 551 transitions. [2022-02-15 13:06:40,891 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 551 transitions. Word has length 17 [2022-02-15 13:06:40,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:40,892 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 551 transitions. [2022-02-15 13:06:40,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 551 transitions. [2022-02-15 13:06:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:40,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:40,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:40,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 13:06:40,893 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1480901912, now seen corresponding path program 6 times [2022-02-15 13:06:40,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:40,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390469620] [2022-02-15 13:06:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:40,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:40,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:40,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390469620] [2022-02-15 13:06:40,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390469620] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:40,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777743207] [2022-02-15 13:06:40,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:40,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:40,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:40,960 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) [2022-02-15 13:06:40,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-15 13:06:40,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 13:06:40,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:40,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:06:40,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:41,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:41,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777743207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:41,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:41,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-02-15 13:06:41,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611777056] [2022-02-15 13:06:41,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:41,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:06:41,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:41,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:06:41,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:06:41,179 INFO L87 Difference]: Start difference. First operand 192 states and 551 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:41,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:41,351 INFO L93 Difference]: Finished difference Result 379 states and 1074 transitions. [2022-02-15 13:06:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:06:41,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:41,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:41,353 INFO L225 Difference]: With dead ends: 379 [2022-02-15 13:06:41,353 INFO L226 Difference]: Without dead ends: 379 [2022-02-15 13:06:41,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:06:41,353 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 135 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:41,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 65 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:41,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-02-15 13:06:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 186. [2022-02-15 13:06:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.854054054054054) internal successors, (528), 185 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 528 transitions. [2022-02-15 13:06:41,359 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 528 transitions. Word has length 17 [2022-02-15 13:06:41,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:41,359 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 528 transitions. [2022-02-15 13:06:41,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:41,359 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 528 transitions. [2022-02-15 13:06:41,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:06:41,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:41,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:41,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:41,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:41,562 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:41,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:41,563 INFO L85 PathProgramCache]: Analyzing trace with hash -444220188, now seen corresponding path program 7 times [2022-02-15 13:06:41,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:41,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609682396] [2022-02-15 13:06:41,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:41,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:41,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:41,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609682396] [2022-02-15 13:06:41,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609682396] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:41,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261926599] [2022-02-15 13:06:41,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:41,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:41,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:41,611 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) [2022-02-15 13:06:41,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-15 13:06:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:41,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:06:41,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:41,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:41,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261926599] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:41,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:41,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-02-15 13:06:41,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161342549] [2022-02-15 13:06:41,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:41,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:06:41,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:41,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:06:41,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:06:41,832 INFO L87 Difference]: Start difference. First operand 186 states and 528 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:42,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:42,079 INFO L93 Difference]: Finished difference Result 324 states and 942 transitions. [2022-02-15 13:06:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:06:42,080 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-02-15 13:06:42,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:42,081 INFO L225 Difference]: With dead ends: 324 [2022-02-15 13:06:42,081 INFO L226 Difference]: Without dead ends: 324 [2022-02-15 13:06:42,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:06:42,082 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:42,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 78 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:42,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-02-15 13:06:42,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 168. [2022-02-15 13:06:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.8862275449101795) internal successors, (482), 167 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:42,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 482 transitions. [2022-02-15 13:06:42,086 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 482 transitions. Word has length 17 [2022-02-15 13:06:42,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:42,086 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 482 transitions. [2022-02-15 13:06:42,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:42,086 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 482 transitions. [2022-02-15 13:06:42,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:06:42,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:42,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:42,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:42,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:42,303 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:42,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:42,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1880408526, now seen corresponding path program 1 times [2022-02-15 13:06:42,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:42,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589203446] [2022-02-15 13:06:42,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:42,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:42,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:42,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589203446] [2022-02-15 13:06:42,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589203446] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:42,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69321013] [2022-02-15 13:06:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:42,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:42,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:42,356 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) [2022-02-15 13:06:42,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-15 13:06:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:42,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:06:42,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:42,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:42,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69321013] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:42,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:42,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2022-02-15 13:06:42,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112031960] [2022-02-15 13:06:42,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:42,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 13:06:42,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:42,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 13:06:42,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:06:42,545 INFO L87 Difference]: Start difference. First operand 168 states and 482 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:42,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:42,611 INFO L93 Difference]: Finished difference Result 554 states and 1610 transitions. [2022-02-15 13:06:42,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 13:06:42,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-02-15 13:06:42,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:42,614 INFO L225 Difference]: With dead ends: 554 [2022-02-15 13:06:42,614 INFO L226 Difference]: Without dead ends: 524 [2022-02-15 13:06:42,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:06:42,614 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:42,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 110 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-02-15 13:06:42,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 301. [2022-02-15 13:06:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.06) internal successors, (918), 300 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 918 transitions. [2022-02-15 13:06:42,637 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 918 transitions. Word has length 19 [2022-02-15 13:06:42,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:42,637 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 918 transitions. [2022-02-15 13:06:42,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:42,637 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 918 transitions. [2022-02-15 13:06:42,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:06:42,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:42,638 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:42,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:42,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-15 13:06:42,855 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:42,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:42,855 INFO L85 PathProgramCache]: Analyzing trace with hash 280106304, now seen corresponding path program 2 times [2022-02-15 13:06:42,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:42,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042794428] [2022-02-15 13:06:42,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:42,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:42,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:42,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042794428] [2022-02-15 13:06:42,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042794428] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:42,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739830778] [2022-02-15 13:06:42,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:42,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:42,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:42,934 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) [2022-02-15 13:06:42,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-15 13:06:42,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:42,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:42,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:06:42,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:43,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:06:43,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739830778] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:43,123 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-15 13:06:43,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 8 [2022-02-15 13:06:43,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486840832] [2022-02-15 13:06:43,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:06:43,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 13:06:43,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:43,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 13:06:43,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:06:43,124 INFO L87 Difference]: Start difference. First operand 301 states and 918 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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) [2022-02-15 13:06:43,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:43,147 INFO L93 Difference]: Finished difference Result 505 states and 1514 transitions. [2022-02-15 13:06:43,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 13:06:43,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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 19 [2022-02-15 13:06:43,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:43,149 INFO L225 Difference]: With dead ends: 505 [2022-02-15 13:06:43,150 INFO L226 Difference]: Without dead ends: 490 [2022-02-15 13:06:43,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:06:43,150 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:43,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:06:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-02-15 13:06:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 415. [2022-02-15 13:06:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.152173913043478) internal successors, (1305), 414 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1305 transitions. [2022-02-15 13:06:43,158 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1305 transitions. Word has length 19 [2022-02-15 13:06:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:43,159 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1305 transitions. [2022-02-15 13:06:43,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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) [2022-02-15 13:06:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1305 transitions. [2022-02-15 13:06:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:43,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:43,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:43,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-15 13:06:43,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:43,379 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:43,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:43,379 INFO L85 PathProgramCache]: Analyzing trace with hash 679671728, now seen corresponding path program 3 times [2022-02-15 13:06:43,379 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:43,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482698702] [2022-02-15 13:06:43,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:43,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:43,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:43,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482698702] [2022-02-15 13:06:43,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482698702] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:43,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208866420] [2022-02-15 13:06:43,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:43,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:43,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:43,426 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) [2022-02-15 13:06:43,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-15 13:06:43,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:06:43,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:43,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:06:43,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:43,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:43,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208866420] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:43,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:43,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-02-15 13:06:43,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744044726] [2022-02-15 13:06:43,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:43,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:06:43,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:43,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:06:43,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:06:43,642 INFO L87 Difference]: Start difference. First operand 415 states and 1305 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:43,887 INFO L93 Difference]: Finished difference Result 1184 states and 3469 transitions. [2022-02-15 13:06:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:06:43,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:06:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:43,892 INFO L225 Difference]: With dead ends: 1184 [2022-02-15 13:06:43,892 INFO L226 Difference]: Without dead ends: 1184 [2022-02-15 13:06:43,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:06:43,892 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 165 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:43,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 104 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:43,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2022-02-15 13:06:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 547. [2022-02-15 13:06:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 3.2747252747252746) internal successors, (1788), 546 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1788 transitions. [2022-02-15 13:06:43,907 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1788 transitions. Word has length 21 [2022-02-15 13:06:43,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:43,907 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 1788 transitions. [2022-02-15 13:06:43,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:43,907 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1788 transitions. [2022-02-15 13:06:43,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:43,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:43,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:43,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-15 13:06:44,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:44,123 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:44,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1166690382, now seen corresponding path program 1 times [2022-02-15 13:06:44,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:44,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376685344] [2022-02-15 13:06:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:44,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:44,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:44,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376685344] [2022-02-15 13:06:44,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376685344] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:44,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495930301] [2022-02-15 13:06:44,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:44,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:44,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:44,175 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) [2022-02-15 13:06:44,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-15 13:06:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:44,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:44,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:44,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:44,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495930301] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:44,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:44,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-02-15 13:06:44,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387119928] [2022-02-15 13:06:44,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:44,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:06:44,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:44,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:06:44,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:44,393 INFO L87 Difference]: Start difference. First operand 547 states and 1788 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2022-02-15 13:06:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:44,780 INFO L93 Difference]: Finished difference Result 1383 states and 4228 transitions. [2022-02-15 13:06:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:06:44,781 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 21 [2022-02-15 13:06:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:44,786 INFO L225 Difference]: With dead ends: 1383 [2022-02-15 13:06:44,786 INFO L226 Difference]: Without dead ends: 1383 [2022-02-15 13:06:44,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:06:44,787 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 143 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:44,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 103 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:06:44,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2022-02-15 13:06:44,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 672. [2022-02-15 13:06:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.2801788375558867) internal successors, (2201), 671 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2201 transitions. [2022-02-15 13:06:44,803 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2201 transitions. Word has length 21 [2022-02-15 13:06:44,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:44,803 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 2201 transitions. [2022-02-15 13:06:44,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2022-02-15 13:06:44,803 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2201 transitions. [2022-02-15 13:06:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:44,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:44,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:44,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-15 13:06:45,040 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,SelfDestructingSolverStorable15 [2022-02-15 13:06:45,041 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:45,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:45,041 INFO L85 PathProgramCache]: Analyzing trace with hash -671302868, now seen corresponding path program 4 times [2022-02-15 13:06:45,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:45,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244458831] [2022-02-15 13:06:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:45,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:45,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:45,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244458831] [2022-02-15 13:06:45,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244458831] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:45,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649388916] [2022-02-15 13:06:45,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:45,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:45,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:45,091 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) [2022-02-15 13:06:45,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-15 13:06:45,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:45,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:45,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:06:45,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:45,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:45,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649388916] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:45,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:45,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-15 13:06:45,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109395360] [2022-02-15 13:06:45,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:45,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:45,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:45,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:45,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:45,291 INFO L87 Difference]: Start difference. First operand 672 states and 2201 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:45,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:45,890 INFO L93 Difference]: Finished difference Result 1750 states and 5112 transitions. [2022-02-15 13:06:45,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 13:06:45,891 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:06:45,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:45,897 INFO L225 Difference]: With dead ends: 1750 [2022-02-15 13:06:45,897 INFO L226 Difference]: Without dead ends: 1700 [2022-02-15 13:06:45,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=1285, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:06:45,898 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 360 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:45,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 158 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:06:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2022-02-15 13:06:45,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 740. [2022-02-15 13:06:45,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.277401894451962) internal successors, (2422), 739 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:45,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2422 transitions. [2022-02-15 13:06:45,920 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2422 transitions. Word has length 21 [2022-02-15 13:06:45,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:45,920 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2422 transitions. [2022-02-15 13:06:45,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:45,920 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2422 transitions. [2022-02-15 13:06:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:45,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:45,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:45,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:46,138 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,SelfDestructingSolverStorable16 [2022-02-15 13:06:46,139 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:46,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:46,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1344672536, now seen corresponding path program 5 times [2022-02-15 13:06:46,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:46,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712526335] [2022-02-15 13:06:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:46,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:46,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:46,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712526335] [2022-02-15 13:06:46,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712526335] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:46,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868986513] [2022-02-15 13:06:46,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:06:46,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:46,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:46,183 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) [2022-02-15 13:06:46,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-15 13:06:46,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:06:46,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:46,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:06:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:46,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:46,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868986513] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:46,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:46,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-15 13:06:46,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925017449] [2022-02-15 13:06:46,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:46,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:46,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:46,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:46,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:46,408 INFO L87 Difference]: Start difference. First operand 740 states and 2422 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2022-02-15 13:06:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:47,458 INFO L93 Difference]: Finished difference Result 2297 states and 6631 transitions. [2022-02-15 13:06:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 13:06:47,458 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 21 [2022-02-15 13:06:47,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:47,467 INFO L225 Difference]: With dead ends: 2297 [2022-02-15 13:06:47,467 INFO L226 Difference]: Without dead ends: 2297 [2022-02-15 13:06:47,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1009, Invalid=3023, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:06:47,468 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 374 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:47,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 208 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:06:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2022-02-15 13:06:47,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 756. [2022-02-15 13:06:47,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.282119205298013) internal successors, (2478), 755 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2478 transitions. [2022-02-15 13:06:47,493 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2478 transitions. Word has length 21 [2022-02-15 13:06:47,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:47,493 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 2478 transitions. [2022-02-15 13:06:47,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2022-02-15 13:06:47,494 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2478 transitions. [2022-02-15 13:06:47,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:47,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:47,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:47,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:47,713 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,SelfDestructingSolverStorable17 [2022-02-15 13:06:47,713 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:47,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:47,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1538627048, now seen corresponding path program 2 times [2022-02-15 13:06:47,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:47,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835023173] [2022-02-15 13:06:47,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:47,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:47,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:47,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835023173] [2022-02-15 13:06:47,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835023173] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:47,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820222085] [2022-02-15 13:06:47,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:47,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:47,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:47,780 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) [2022-02-15 13:06:47,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-15 13:06:47,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:47,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:47,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:47,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:47,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:47,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820222085] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:47,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:47,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-02-15 13:06:47,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717732886] [2022-02-15 13:06:47,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:47,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:06:47,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:47,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:06:47,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:47,986 INFO L87 Difference]: Start difference. First operand 756 states and 2478 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:48,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:48,573 INFO L93 Difference]: Finished difference Result 3028 states and 9113 transitions. [2022-02-15 13:06:48,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 13:06:48,574 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:06:48,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:48,584 INFO L225 Difference]: With dead ends: 3028 [2022-02-15 13:06:48,585 INFO L226 Difference]: Without dead ends: 3012 [2022-02-15 13:06:48,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=426, Invalid=1296, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:06:48,586 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 317 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:48,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 157 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:06:48,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2022-02-15 13:06:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 999. [2022-02-15 13:06:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 3.3887775551102206) internal successors, (3382), 998 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 3382 transitions. [2022-02-15 13:06:48,638 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 3382 transitions. Word has length 21 [2022-02-15 13:06:48,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:48,638 INFO L470 AbstractCegarLoop]: Abstraction has 999 states and 3382 transitions. [2022-02-15 13:06:48,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:48,638 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 3382 transitions. [2022-02-15 13:06:48,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:48,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:48,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:48,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:48,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:48,859 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:48,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:48,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1777782804, now seen corresponding path program 3 times [2022-02-15 13:06:48,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:48,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483111042] [2022-02-15 13:06:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:48,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:48,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:48,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483111042] [2022-02-15 13:06:48,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483111042] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:48,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963301241] [2022-02-15 13:06:48,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:48,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:48,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:48,896 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) [2022-02-15 13:06:48,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-15 13:06:48,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 13:06:48,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:48,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:06:48,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:49,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:49,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963301241] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:49,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:49,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-02-15 13:06:49,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245670902] [2022-02-15 13:06:49,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:49,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:06:49,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:49,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:06:49,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:06:49,075 INFO L87 Difference]: Start difference. First operand 999 states and 3382 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2022-02-15 13:06:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:49,570 INFO L93 Difference]: Finished difference Result 3180 states and 9617 transitions. [2022-02-15 13:06:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 13:06:49,570 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 21 [2022-02-15 13:06:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:49,583 INFO L225 Difference]: With dead ends: 3180 [2022-02-15 13:06:49,583 INFO L226 Difference]: Without dead ends: 3166 [2022-02-15 13:06:49,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:06:49,584 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 280 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:49,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 221 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:06:49,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2022-02-15 13:06:49,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 991. [2022-02-15 13:06:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.382828282828283) internal successors, (3349), 990 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3349 transitions. [2022-02-15 13:06:49,615 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3349 transitions. Word has length 21 [2022-02-15 13:06:49,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:49,616 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 3349 transitions. [2022-02-15 13:06:49,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2022-02-15 13:06:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3349 transitions. [2022-02-15 13:06:49,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:49,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:49,618 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:49,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:49,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:49,834 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:49,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:49,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1471548184, now seen corresponding path program 6 times [2022-02-15 13:06:49,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:49,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323935951] [2022-02-15 13:06:49,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:49,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:49,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:49,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323935951] [2022-02-15 13:06:49,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323935951] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:49,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704939] [2022-02-15 13:06:49,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:49,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:49,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:49,867 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) [2022-02-15 13:06:49,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-15 13:06:49,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:06:49,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:49,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:06:49,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:50,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:50,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704939] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:50,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:50,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-15 13:06:50,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541220479] [2022-02-15 13:06:50,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:50,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:50,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:50,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:50,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:50,078 INFO L87 Difference]: Start difference. First operand 991 states and 3349 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:50,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:50,615 INFO L93 Difference]: Finished difference Result 2213 states and 6556 transitions. [2022-02-15 13:06:50,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:06:50,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:06:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:50,621 INFO L225 Difference]: With dead ends: 2213 [2022-02-15 13:06:50,621 INFO L226 Difference]: Without dead ends: 2185 [2022-02-15 13:06:50,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=512, Invalid=1468, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 13:06:50,622 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 312 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:50,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 179 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:06:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2022-02-15 13:06:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 983. [2022-02-15 13:06:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 3.3716904276985744) internal successors, (3311), 982 states have internal predecessors, (3311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 3311 transitions. [2022-02-15 13:06:50,662 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 3311 transitions. Word has length 21 [2022-02-15 13:06:50,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:50,663 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 3311 transitions. [2022-02-15 13:06:50,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:50,663 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 3311 transitions. [2022-02-15 13:06:50,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:50,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:50,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:50,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:50,883 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,SelfDestructingSolverStorable20 [2022-02-15 13:06:50,883 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:50,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:50,883 INFO L85 PathProgramCache]: Analyzing trace with hash 734714668, now seen corresponding path program 7 times [2022-02-15 13:06:50,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:50,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431319299] [2022-02-15 13:06:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:50,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:50,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:50,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431319299] [2022-02-15 13:06:50,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431319299] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:50,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972038724] [2022-02-15 13:06:50,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:50,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:50,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:50,927 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) [2022-02-15 13:06:50,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-15 13:06:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:50,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:06:50,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:51,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:51,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972038724] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:51,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:51,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-15 13:06:51,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727779236] [2022-02-15 13:06:51,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:51,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:51,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:51,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:51,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:51,116 INFO L87 Difference]: Start difference. First operand 983 states and 3311 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:51,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:51,673 INFO L93 Difference]: Finished difference Result 2176 states and 6530 transitions. [2022-02-15 13:06:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 13:06:51,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:06:51,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:51,679 INFO L225 Difference]: With dead ends: 2176 [2022-02-15 13:06:51,679 INFO L226 Difference]: Without dead ends: 2126 [2022-02-15 13:06:51,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=1285, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:06:51,681 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 339 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:51,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 154 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:06:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2022-02-15 13:06:51,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1046. [2022-02-15 13:06:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 3.384688995215311) internal successors, (3537), 1045 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3537 transitions. [2022-02-15 13:06:51,704 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3537 transitions. Word has length 21 [2022-02-15 13:06:51,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:51,704 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 3537 transitions. [2022-02-15 13:06:51,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3537 transitions. [2022-02-15 13:06:51,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:51,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:51,706 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:51,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:51,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:51,923 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:51,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:51,923 INFO L85 PathProgramCache]: Analyzing trace with hash -548576280, now seen corresponding path program 8 times [2022-02-15 13:06:51,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:51,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921203616] [2022-02-15 13:06:51,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:51,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:51,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:51,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921203616] [2022-02-15 13:06:51,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921203616] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:51,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885097964] [2022-02-15 13:06:51,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:51,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:51,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:51,961 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) [2022-02-15 13:06:51,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-15 13:06:51,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:51,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:51,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:06:51,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:52,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:52,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885097964] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:52,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:52,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-15 13:06:52,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342730574] [2022-02-15 13:06:52,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:52,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:52,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:52,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:52,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:52,212 INFO L87 Difference]: Start difference. First operand 1046 states and 3537 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:52,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:52,988 INFO L93 Difference]: Finished difference Result 2322 states and 6923 transitions. [2022-02-15 13:06:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 13:06:52,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:06:52,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:52,994 INFO L225 Difference]: With dead ends: 2322 [2022-02-15 13:06:52,994 INFO L226 Difference]: Without dead ends: 2287 [2022-02-15 13:06:52,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=556, Invalid=1606, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 13:06:52,995 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 347 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:52,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 164 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:06:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2022-02-15 13:06:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1088. [2022-02-15 13:06:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.3679852805887767) internal successors, (3661), 1087 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:53,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3661 transitions. [2022-02-15 13:06:53,020 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3661 transitions. Word has length 21 [2022-02-15 13:06:53,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:53,020 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 3661 transitions. [2022-02-15 13:06:53,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:53,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3661 transitions. [2022-02-15 13:06:53,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:53,022 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:53,022 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:53,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:53,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:53,239 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:53,239 INFO L85 PathProgramCache]: Analyzing trace with hash 556018412, now seen corresponding path program 9 times [2022-02-15 13:06:53,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:53,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080753182] [2022-02-15 13:06:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:53,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:53,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:53,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080753182] [2022-02-15 13:06:53,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080753182] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:53,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189180024] [2022-02-15 13:06:53,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:53,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:53,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:53,273 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) [2022-02-15 13:06:53,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-15 13:06:53,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:06:53,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:53,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:06:53,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:53,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:53,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:53,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189180024] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:53,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:53,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-15 13:06:53,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324081864] [2022-02-15 13:06:53,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:53,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:53,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:53,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:53,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:53,478 INFO L87 Difference]: Start difference. First operand 1088 states and 3661 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2022-02-15 13:06:54,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:54,276 INFO L93 Difference]: Finished difference Result 2409 states and 7174 transitions. [2022-02-15 13:06:54,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 13:06:54,277 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 21 [2022-02-15 13:06:54,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:54,282 INFO L225 Difference]: With dead ends: 2409 [2022-02-15 13:06:54,282 INFO L226 Difference]: Without dead ends: 2409 [2022-02-15 13:06:54,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 13:06:54,284 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 308 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:54,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 229 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:06:54,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2022-02-15 13:06:54,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 1112. [2022-02-15 13:06:54,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.360936093609361) internal successors, (3734), 1111 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:54,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3734 transitions. [2022-02-15 13:06:54,311 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3734 transitions. Word has length 21 [2022-02-15 13:06:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:54,312 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3734 transitions. [2022-02-15 13:06:54,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2022-02-15 13:06:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3734 transitions. [2022-02-15 13:06:54,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:54,314 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:54,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:54,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:54,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-15 13:06:54,530 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:54,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1136089424, now seen corresponding path program 10 times [2022-02-15 13:06:54,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:54,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680335239] [2022-02-15 13:06:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:54,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:54,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:54,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680335239] [2022-02-15 13:06:54,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680335239] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:54,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277223662] [2022-02-15 13:06:54,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:54,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:54,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:54,572 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) [2022-02-15 13:06:54,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-15 13:06:54,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:54,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:54,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:06:54,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:54,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:54,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277223662] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:54,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:54,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-02-15 13:06:54,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724610178] [2022-02-15 13:06:54,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:54,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 13:06:54,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:54,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 13:06:54,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:06:54,688 INFO L87 Difference]: Start difference. First operand 1112 states and 3734 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:54,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:54,839 INFO L93 Difference]: Finished difference Result 1740 states and 5391 transitions. [2022-02-15 13:06:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:06:54,839 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:06:54,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:54,843 INFO L225 Difference]: With dead ends: 1740 [2022-02-15 13:06:54,844 INFO L226 Difference]: Without dead ends: 1732 [2022-02-15 13:06:54,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:06:54,844 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 107 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:54,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 72 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:54,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2022-02-15 13:06:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1128. [2022-02-15 13:06:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 3.345164152617569) internal successors, (3770), 1127 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 3770 transitions. [2022-02-15 13:06:54,866 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 3770 transitions. Word has length 21 [2022-02-15 13:06:54,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:54,866 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 3770 transitions. [2022-02-15 13:06:54,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 3770 transitions. [2022-02-15 13:06:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:54,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:54,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:54,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:55,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:55,075 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:55,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:55,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1273082712, now seen corresponding path program 11 times [2022-02-15 13:06:55,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:55,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018368165] [2022-02-15 13:06:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:55,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:55,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:55,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018368165] [2022-02-15 13:06:55,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018368165] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:55,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143730066] [2022-02-15 13:06:55,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:06:55,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:55,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:55,117 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) [2022-02-15 13:06:55,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:06:55,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:55,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-15 13:06:55,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:06:55,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:55,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:55,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143730066] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:55,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:55,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-02-15 13:06:55,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174547535] [2022-02-15 13:06:55,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:55,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:55,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:55,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:55,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:55,342 INFO L87 Difference]: Start difference. First operand 1128 states and 3770 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:56,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:56,236 INFO L93 Difference]: Finished difference Result 3058 states and 9441 transitions. [2022-02-15 13:06:56,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:06:56,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:06:56,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:56,243 INFO L225 Difference]: With dead ends: 3058 [2022-02-15 13:06:56,243 INFO L226 Difference]: Without dead ends: 3058 [2022-02-15 13:06:56,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=975, Invalid=2685, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 13:06:56,245 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 341 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:56,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 166 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:06:56,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2022-02-15 13:06:56,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 1235. [2022-02-15 13:06:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1234 states have (on average 3.4173419773095626) internal successors, (4217), 1234 states have internal predecessors, (4217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:56,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 4217 transitions. [2022-02-15 13:06:56,302 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 4217 transitions. Word has length 21 [2022-02-15 13:06:56,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:56,302 INFO L470 AbstractCegarLoop]: Abstraction has 1235 states and 4217 transitions. [2022-02-15 13:06:56,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:56,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 4217 transitions. [2022-02-15 13:06:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:56,305 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:56,305 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:56,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:56,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:56,522 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:56,522 INFO L85 PathProgramCache]: Analyzing trace with hash -236400988, now seen corresponding path program 12 times [2022-02-15 13:06:56,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:56,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99888021] [2022-02-15 13:06:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:56,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:56,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:56,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99888021] [2022-02-15 13:06:56,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99888021] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:56,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648649473] [2022-02-15 13:06:56,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:06:56,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:56,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:56,560 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) [2022-02-15 13:06:56,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-15 13:06:56,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:06:56,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:56,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:06:56,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:56,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:56,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648649473] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:56,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:56,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-02-15 13:06:56,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296018782] [2022-02-15 13:06:56,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:56,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:56,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:56,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:56,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:56,810 INFO L87 Difference]: Start difference. First operand 1235 states and 4217 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:57,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:57,628 INFO L93 Difference]: Finished difference Result 2867 states and 8754 transitions. [2022-02-15 13:06:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 13:06:57,628 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:06:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:57,633 INFO L225 Difference]: With dead ends: 2867 [2022-02-15 13:06:57,633 INFO L226 Difference]: Without dead ends: 2867 [2022-02-15 13:06:57,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=716, Invalid=1834, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:06:57,634 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 288 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:57,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 202 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:06:57,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2022-02-15 13:06:57,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 1238. [2022-02-15 13:06:57,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.4033953112368636) internal successors, (4210), 1237 states have internal predecessors, (4210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4210 transitions. [2022-02-15 13:06:57,667 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4210 transitions. Word has length 21 [2022-02-15 13:06:57,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:57,667 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 4210 transitions. [2022-02-15 13:06:57,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:57,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4210 transitions. [2022-02-15 13:06:57,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:57,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:57,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:57,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:57,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:57,904 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:57,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1223951006, now seen corresponding path program 13 times [2022-02-15 13:06:57,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:57,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828034661] [2022-02-15 13:06:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:57,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:57,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:57,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828034661] [2022-02-15 13:06:57,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828034661] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:57,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555335713] [2022-02-15 13:06:57,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:06:57,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:57,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:57,931 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) [2022-02-15 13:06:57,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-15 13:06:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:57,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:06:57,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:58,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:58,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555335713] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:58,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:58,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-15 13:06:58,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462707686] [2022-02-15 13:06:58,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:58,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:06:58,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:58,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:06:58,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:06:58,071 INFO L87 Difference]: Start difference. First operand 1238 states and 4210 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:58,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:58,225 INFO L93 Difference]: Finished difference Result 2695 states and 8625 transitions. [2022-02-15 13:06:58,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:06:58,226 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:06:58,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:58,230 INFO L225 Difference]: With dead ends: 2695 [2022-02-15 13:06:58,230 INFO L226 Difference]: Without dead ends: 2695 [2022-02-15 13:06:58,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:06:58,231 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 122 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:58,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 74 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2022-02-15 13:06:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 1632. [2022-02-15 13:06:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.5113427345187) internal successors, (5727), 1631 states have internal predecessors, (5727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5727 transitions. [2022-02-15 13:06:58,277 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5727 transitions. Word has length 21 [2022-02-15 13:06:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:58,277 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 5727 transitions. [2022-02-15 13:06:58,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:58,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5727 transitions. [2022-02-15 13:06:58,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:58,280 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:58,280 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:58,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:58,496 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,SelfDestructingSolverStorable27 [2022-02-15 13:06:58,496 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:58,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:58,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1550959386, now seen corresponding path program 14 times [2022-02-15 13:06:58,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:58,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7456583] [2022-02-15 13:06:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:58,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:58,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:58,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7456583] [2022-02-15 13:06:58,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7456583] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:58,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96693878] [2022-02-15 13:06:58,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:06:58,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:58,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:58,544 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) [2022-02-15 13:06:58,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-15 13:06:58,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:06:58,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:58,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:06:58,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:58,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:58,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96693878] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:58,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:58,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-02-15 13:06:58,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799232227] [2022-02-15 13:06:58,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:58,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 13:06:58,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:58,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 13:06:58,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:06:58,647 INFO L87 Difference]: Start difference. First operand 1632 states and 5727 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2022-02-15 13:06:58,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:58,735 INFO L93 Difference]: Finished difference Result 2484 states and 8015 transitions. [2022-02-15 13:06:58,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:06:58,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 21 [2022-02-15 13:06:58,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:58,739 INFO L225 Difference]: With dead ends: 2484 [2022-02-15 13:06:58,739 INFO L226 Difference]: Without dead ends: 2476 [2022-02-15 13:06:58,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:06:58,743 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 155 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:58,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 46 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:58,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2022-02-15 13:06:58,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1632. [2022-02-15 13:06:58,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.505211526670754) internal successors, (5717), 1631 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:58,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5717 transitions. [2022-02-15 13:06:58,774 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5717 transitions. Word has length 21 [2022-02-15 13:06:58,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:58,774 INFO L470 AbstractCegarLoop]: Abstraction has 1632 states and 5717 transitions. [2022-02-15 13:06:58,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2022-02-15 13:06:58,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5717 transitions. [2022-02-15 13:06:58,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:58,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:58,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:58,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:58,993 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,SelfDestructingSolverStorable28 [2022-02-15 13:06:58,993 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:58,993 INFO L85 PathProgramCache]: Analyzing trace with hash -67824448, now seen corresponding path program 15 times [2022-02-15 13:06:58,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:58,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090426367] [2022-02-15 13:06:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:58,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:59,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:59,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090426367] [2022-02-15 13:06:59,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090426367] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:59,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531213912] [2022-02-15 13:06:59,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:06:59,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:59,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:59,046 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) [2022-02-15 13:06:59,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-15 13:06:59,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:06:59,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:59,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:06:59,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:59,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:59,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531213912] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:59,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:59,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-02-15 13:06:59,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517603884] [2022-02-15 13:06:59,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:59,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:06:59,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:59,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:06:59,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:06:59,178 INFO L87 Difference]: Start difference. First operand 1632 states and 5717 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:59,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:06:59,325 INFO L93 Difference]: Finished difference Result 2462 states and 7934 transitions. [2022-02-15 13:06:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:06:59,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:06:59,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:06:59,330 INFO L225 Difference]: With dead ends: 2462 [2022-02-15 13:06:59,330 INFO L226 Difference]: Without dead ends: 2440 [2022-02-15 13:06:59,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:06:59,330 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:06:59,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 58 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:06:59,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2022-02-15 13:06:59,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1678. [2022-02-15 13:06:59,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.4806201550387597) internal successors, (5837), 1677 states have internal predecessors, (5837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:59,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 5837 transitions. [2022-02-15 13:06:59,360 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 5837 transitions. Word has length 21 [2022-02-15 13:06:59,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:06:59,360 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 5837 transitions. [2022-02-15 13:06:59,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:06:59,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 5837 transitions. [2022-02-15 13:06:59,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:06:59,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:06:59,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:06:59,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-15 13:06:59,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:59,580 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:06:59,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:06:59,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1112056286, now seen corresponding path program 16 times [2022-02-15 13:06:59,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:06:59,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718851031] [2022-02-15 13:06:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:06:59,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:06:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:06:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:59,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:06:59,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718851031] [2022-02-15 13:06:59,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718851031] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:06:59,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103363285] [2022-02-15 13:06:59,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:06:59,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:06:59,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:06:59,624 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) [2022-02-15 13:06:59,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-15 13:06:59,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:06:59,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:06:59,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:06:59,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:06:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:06:59,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:06:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:06:59,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103363285] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:06:59,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:06:59,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-02-15 13:06:59,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811573258] [2022-02-15 13:06:59,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:06:59,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:06:59,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:06:59,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:06:59,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:06:59,838 INFO L87 Difference]: Start difference. First operand 1678 states and 5837 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2022-02-15 13:07:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:00,459 INFO L93 Difference]: Finished difference Result 2987 states and 9432 transitions. [2022-02-15 13:07:00,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 13:07:00,459 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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 21 [2022-02-15 13:07:00,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:00,465 INFO L225 Difference]: With dead ends: 2987 [2022-02-15 13:07:00,465 INFO L226 Difference]: Without dead ends: 2987 [2022-02-15 13:07:00,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:07:00,468 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 220 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:00,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 171 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:00,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2987 states. [2022-02-15 13:07:00,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2987 to 1697. [2022-02-15 13:07:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.4929245283018866) internal successors, (5924), 1696 states have internal predecessors, (5924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:00,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5924 transitions. [2022-02-15 13:07:00,502 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5924 transitions. Word has length 21 [2022-02-15 13:07:00,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:00,502 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 5924 transitions. [2022-02-15 13:07:00,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2022-02-15 13:07:00,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5924 transitions. [2022-02-15 13:07:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:00,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:00,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:00,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:00,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:00,721 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:00,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:00,721 INFO L85 PathProgramCache]: Analyzing trace with hash 985180638, now seen corresponding path program 17 times [2022-02-15 13:07:00,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:00,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575172937] [2022-02-15 13:07:00,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:00,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:00,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:00,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575172937] [2022-02-15 13:07:00,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575172937] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:00,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789335985] [2022-02-15 13:07:00,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:00,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:00,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:00,756 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) [2022-02-15 13:07:00,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-15 13:07:00,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:00,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:00,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:07:00,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:00,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:00,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789335985] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:00,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:00,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-02-15 13:07:00,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133476532] [2022-02-15 13:07:00,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:00,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:07:00,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:00,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:07:00,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:07:00,925 INFO L87 Difference]: Start difference. First operand 1697 states and 5924 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:01,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:01,385 INFO L93 Difference]: Finished difference Result 2545 states and 8132 transitions. [2022-02-15 13:07:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 13:07:01,385 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:01,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:01,390 INFO L225 Difference]: With dead ends: 2545 [2022-02-15 13:07:01,390 INFO L226 Difference]: Without dead ends: 2531 [2022-02-15 13:07:01,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:07:01,392 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 231 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:01,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 151 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:01,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2022-02-15 13:07:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 1697. [2022-02-15 13:07:01,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.490566037735849) internal successors, (5920), 1696 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5920 transitions. [2022-02-15 13:07:01,458 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5920 transitions. Word has length 21 [2022-02-15 13:07:01,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:01,458 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 5920 transitions. [2022-02-15 13:07:01,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:01,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5920 transitions. [2022-02-15 13:07:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:01,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:01,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:01,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:01,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:01,691 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:01,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2036430370, now seen corresponding path program 18 times [2022-02-15 13:07:01,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:01,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066803753] [2022-02-15 13:07:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:01,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:01,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:01,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066803753] [2022-02-15 13:07:01,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066803753] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:01,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005931185] [2022-02-15 13:07:01,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:01,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:01,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:01,738 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) [2022-02-15 13:07:01,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-15 13:07:01,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 13:07:01,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:01,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:07:01,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:01,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:01,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005931185] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:01,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:01,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-02-15 13:07:01,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671275838] [2022-02-15 13:07:01,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:01,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:07:01,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:01,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:07:01,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:07:01,947 INFO L87 Difference]: Start difference. First operand 1697 states and 5920 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:02,535 INFO L93 Difference]: Finished difference Result 2598 states and 8275 transitions. [2022-02-15 13:07:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 13:07:02,536 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:02,540 INFO L225 Difference]: With dead ends: 2598 [2022-02-15 13:07:02,541 INFO L226 Difference]: Without dead ends: 2584 [2022-02-15 13:07:02,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=1071, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:07:02,541 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 229 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:02,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 165 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:07:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2022-02-15 13:07:02,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1693. [2022-02-15 13:07:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 3.49290780141844) internal successors, (5910), 1692 states have internal predecessors, (5910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:02,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 5910 transitions. [2022-02-15 13:07:02,573 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 5910 transitions. Word has length 21 [2022-02-15 13:07:02,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:02,573 INFO L470 AbstractCegarLoop]: Abstraction has 1693 states and 5910 transitions. [2022-02-15 13:07:02,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:02,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 5910 transitions. [2022-02-15 13:07:02,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:02,576 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:02,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:02,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:02,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-02-15 13:07:02,791 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:02,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:02,792 INFO L85 PathProgramCache]: Analyzing trace with hash -931835678, now seen corresponding path program 19 times [2022-02-15 13:07:02,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:02,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977817262] [2022-02-15 13:07:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:02,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:02,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:02,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977817262] [2022-02-15 13:07:02,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977817262] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:02,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295368612] [2022-02-15 13:07:02,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:02,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:02,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:02,855 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) [2022-02-15 13:07:02,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-15 13:07:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:02,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:07:02,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:03,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:03,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295368612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:03,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:03,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-02-15 13:07:03,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501435964] [2022-02-15 13:07:03,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:03,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:07:03,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:03,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:07:03,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:07:03,062 INFO L87 Difference]: Start difference. First operand 1693 states and 5910 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2022-02-15 13:07:03,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:03,721 INFO L93 Difference]: Finished difference Result 2692 states and 8549 transitions. [2022-02-15 13:07:03,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 13:07:03,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 21 [2022-02-15 13:07:03,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:03,726 INFO L225 Difference]: With dead ends: 2692 [2022-02-15 13:07:03,726 INFO L226 Difference]: Without dead ends: 2680 [2022-02-15 13:07:03,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=392, Invalid=1248, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:07:03,728 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 194 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:03,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 188 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:07:03,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2022-02-15 13:07:03,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1684. [2022-02-15 13:07:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.4937611408199643) internal successors, (5880), 1683 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5880 transitions. [2022-02-15 13:07:03,778 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5880 transitions. Word has length 21 [2022-02-15 13:07:03,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:03,778 INFO L470 AbstractCegarLoop]: Abstraction has 1684 states and 5880 transitions. [2022-02-15 13:07:03,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2022-02-15 13:07:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5880 transitions. [2022-02-15 13:07:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:03,781 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:03,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:03,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:03,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-02-15 13:07:03,997 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:03,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1942186098, now seen corresponding path program 1 times [2022-02-15 13:07:03,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:03,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423097376] [2022-02-15 13:07:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:03,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:04,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:04,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423097376] [2022-02-15 13:07:04,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423097376] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:04,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422945885] [2022-02-15 13:07:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:04,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:04,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:04,031 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) [2022-02-15 13:07:04,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-15 13:07:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:04,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:07:04,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:04,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:04,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422945885] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:04,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:04,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-15 13:07:04,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878920484] [2022-02-15 13:07:04,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:04,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:07:04,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:04,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:07:04,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:07:04,223 INFO L87 Difference]: Start difference. First operand 1684 states and 5880 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:04,668 INFO L93 Difference]: Finished difference Result 2346 states and 7504 transitions. [2022-02-15 13:07:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:07:04,669 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:04,673 INFO L225 Difference]: With dead ends: 2346 [2022-02-15 13:07:04,673 INFO L226 Difference]: Without dead ends: 2346 [2022-02-15 13:07:04,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:07:04,673 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 183 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:04,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 170 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:04,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2022-02-15 13:07:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1738. [2022-02-15 13:07:04,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 3.482440990213011) internal successors, (6049), 1737 states have internal predecessors, (6049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:04,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 6049 transitions. [2022-02-15 13:07:04,701 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 6049 transitions. Word has length 21 [2022-02-15 13:07:04,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:04,701 INFO L470 AbstractCegarLoop]: Abstraction has 1738 states and 6049 transitions. [2022-02-15 13:07:04,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:04,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 6049 transitions. [2022-02-15 13:07:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:04,704 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:04,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:04,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-15 13:07:04,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-02-15 13:07:04,919 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:04,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:04,920 INFO L85 PathProgramCache]: Analyzing trace with hash 57074606, now seen corresponding path program 2 times [2022-02-15 13:07:04,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:04,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924191639] [2022-02-15 13:07:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:04,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:04,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:04,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924191639] [2022-02-15 13:07:04,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924191639] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:04,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074580635] [2022-02-15 13:07:04,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:04,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:04,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:04,954 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) [2022-02-15 13:07:04,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-15 13:07:04,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:04,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:04,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:07:04,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:05,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:05,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074580635] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:05,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:05,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-02-15 13:07:05,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712910120] [2022-02-15 13:07:05,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:05,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:07:05,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:05,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:07:05,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:07:05,079 INFO L87 Difference]: Start difference. First operand 1738 states and 6049 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:05,215 INFO L93 Difference]: Finished difference Result 3182 states and 10482 transitions. [2022-02-15 13:07:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:07:05,216 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:05,221 INFO L225 Difference]: With dead ends: 3182 [2022-02-15 13:07:05,221 INFO L226 Difference]: Without dead ends: 3170 [2022-02-15 13:07:05,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:05,221 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 200 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:05,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 53 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3170 states. [2022-02-15 13:07:05,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3170 to 1964. [2022-02-15 13:07:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 3.5252165053489555) internal successors, (6920), 1963 states have internal predecessors, (6920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:05,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 6920 transitions. [2022-02-15 13:07:05,256 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 6920 transitions. Word has length 21 [2022-02-15 13:07:05,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:05,256 INFO L470 AbstractCegarLoop]: Abstraction has 1964 states and 6920 transitions. [2022-02-15 13:07:05,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:05,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 6920 transitions. [2022-02-15 13:07:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:05,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:05,259 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:05,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:05,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:05,461 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:05,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1957334190, now seen corresponding path program 3 times [2022-02-15 13:07:05,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:05,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427626785] [2022-02-15 13:07:05,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:05,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:05,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:05,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427626785] [2022-02-15 13:07:05,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427626785] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:05,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610461209] [2022-02-15 13:07:05,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:05,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:05,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:05,502 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) [2022-02-15 13:07:05,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-15 13:07:05,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:07:05,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:05,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:07:05,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:05,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:05,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610461209] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:05,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:05,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-15 13:07:05,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658806628] [2022-02-15 13:07:05,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:05,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:07:05,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:05,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:07:05,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:07:05,620 INFO L87 Difference]: Start difference. First operand 1964 states and 6920 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:05,805 INFO L93 Difference]: Finished difference Result 3443 states and 11289 transitions. [2022-02-15 13:07:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:07:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:05,811 INFO L225 Difference]: With dead ends: 3443 [2022-02-15 13:07:05,811 INFO L226 Difference]: Without dead ends: 3443 [2022-02-15 13:07:05,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:05,812 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 155 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:05,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 68 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3443 states. [2022-02-15 13:07:05,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3443 to 1967. [2022-02-15 13:07:05,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.51881993896236) internal successors, (6918), 1966 states have internal predecessors, (6918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 6918 transitions. [2022-02-15 13:07:05,848 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 6918 transitions. Word has length 21 [2022-02-15 13:07:05,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:05,848 INFO L470 AbstractCegarLoop]: Abstraction has 1967 states and 6918 transitions. [2022-02-15 13:07:05,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:05,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 6918 transitions. [2022-02-15 13:07:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:05,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:05,851 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:05,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:06,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-02-15 13:07:06,067 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:06,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:06,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2031398486, now seen corresponding path program 4 times [2022-02-15 13:07:06,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:06,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481808201] [2022-02-15 13:07:06,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:06,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:06,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:06,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481808201] [2022-02-15 13:07:06,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481808201] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:06,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445105548] [2022-02-15 13:07:06,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:06,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:06,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:06,094 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) [2022-02-15 13:07:06,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-15 13:07:06,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:06,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:06,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:07:06,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:06,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:06,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445105548] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:06,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:06,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 11 [2022-02-15 13:07:06,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657184128] [2022-02-15 13:07:06,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:06,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:07:06,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:06,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:07:06,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:07:06,327 INFO L87 Difference]: Start difference. First operand 1967 states and 6918 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2022-02-15 13:07:06,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:06,714 INFO L93 Difference]: Finished difference Result 2329 states and 7790 transitions. [2022-02-15 13:07:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:07:06,715 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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 21 [2022-02-15 13:07:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:06,718 INFO L225 Difference]: With dead ends: 2329 [2022-02-15 13:07:06,719 INFO L226 Difference]: Without dead ends: 2315 [2022-02-15 13:07:06,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:07:06,719 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 120 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:06,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 153 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-02-15 13:07:06,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1967. [2022-02-15 13:07:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.517802644964395) internal successors, (6916), 1966 states have internal predecessors, (6916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 6916 transitions. [2022-02-15 13:07:06,752 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 6916 transitions. Word has length 21 [2022-02-15 13:07:06,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:06,752 INFO L470 AbstractCegarLoop]: Abstraction has 1967 states and 6916 transitions. [2022-02-15 13:07:06,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 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) [2022-02-15 13:07:06,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 6916 transitions. [2022-02-15 13:07:06,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:06,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:06,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:06,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:06,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-15 13:07:06,971 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:06,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:06,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1038218894, now seen corresponding path program 5 times [2022-02-15 13:07:06,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:06,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737739068] [2022-02-15 13:07:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:06,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:07,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:07,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737739068] [2022-02-15 13:07:07,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737739068] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:07,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115087374] [2022-02-15 13:07:07,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:07,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:07,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:07,009 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) [2022-02-15 13:07:07,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-15 13:07:07,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:07:07,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:07,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-15 13:07:07,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:07,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:07,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115087374] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:07,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:07,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-02-15 13:07:07,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968623451] [2022-02-15 13:07:07,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:07,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:07:07,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:07,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:07:07,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:07:07,199 INFO L87 Difference]: Start difference. First operand 1967 states and 6916 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:07,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:07,392 INFO L93 Difference]: Finished difference Result 3606 states and 11938 transitions. [2022-02-15 13:07:07,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:07:07,392 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:07,398 INFO L225 Difference]: With dead ends: 3606 [2022-02-15 13:07:07,398 INFO L226 Difference]: Without dead ends: 3599 [2022-02-15 13:07:07,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:07:07,399 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 163 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:07,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 88 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3599 states. [2022-02-15 13:07:07,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3599 to 2189. [2022-02-15 13:07:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 3.537934186471664) internal successors, (7741), 2188 states have internal predecessors, (7741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:07,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 7741 transitions. [2022-02-15 13:07:07,440 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 7741 transitions. Word has length 21 [2022-02-15 13:07:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:07,440 INFO L470 AbstractCegarLoop]: Abstraction has 2189 states and 7741 transitions. [2022-02-15 13:07:07,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 7741 transitions. [2022-02-15 13:07:07,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:07,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:07,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:07,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:07,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-15 13:07:07,659 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:07,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:07,659 INFO L85 PathProgramCache]: Analyzing trace with hash -487787106, now seen corresponding path program 6 times [2022-02-15 13:07:07,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:07,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060576556] [2022-02-15 13:07:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:07,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:07,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:07,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060576556] [2022-02-15 13:07:07,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060576556] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:07,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334887959] [2022-02-15 13:07:07,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:07,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:07,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:07,695 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) [2022-02-15 13:07:07,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-15 13:07:07,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 13:07:07,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:07,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:07:07,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:07,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:07,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334887959] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:07,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:07,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-02-15 13:07:07,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126730042] [2022-02-15 13:07:07,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:07,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:07:07,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:07:07,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:07:07,885 INFO L87 Difference]: Start difference. First operand 2189 states and 7741 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2022-02-15 13:07:08,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:08,238 INFO L93 Difference]: Finished difference Result 2810 states and 9248 transitions. [2022-02-15 13:07:08,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:07:08,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 21 [2022-02-15 13:07:08,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:08,243 INFO L225 Difference]: With dead ends: 2810 [2022-02-15 13:07:08,243 INFO L226 Difference]: Without dead ends: 2764 [2022-02-15 13:07:08,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:07:08,244 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 164 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:08,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 168 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:08,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2022-02-15 13:07:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2248. [2022-02-15 13:07:08,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 3.51935914552737) internal successors, (7908), 2247 states have internal predecessors, (7908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 7908 transitions. [2022-02-15 13:07:08,327 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 7908 transitions. Word has length 21 [2022-02-15 13:07:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:08,327 INFO L470 AbstractCegarLoop]: Abstraction has 2248 states and 7908 transitions. [2022-02-15 13:07:08,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2022-02-15 13:07:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 7908 transitions. [2022-02-15 13:07:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:08,331 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:08,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:08,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-02-15 13:07:08,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-15 13:07:08,546 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:08,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1640366058, now seen corresponding path program 4 times [2022-02-15 13:07:08,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:08,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297214383] [2022-02-15 13:07:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:08,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:08,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:08,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297214383] [2022-02-15 13:07:08,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297214383] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:08,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792850574] [2022-02-15 13:07:08,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:08,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:08,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:08,624 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) [2022-02-15 13:07:08,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-15 13:07:08,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:08,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:07:08,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:08,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:08,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792850574] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:08,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:08,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-02-15 13:07:08,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453218118] [2022-02-15 13:07:08,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:08,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:07:08,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:08,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:07:08,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:07:08,822 INFO L87 Difference]: Start difference. First operand 2248 states and 7908 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:09,201 INFO L93 Difference]: Finished difference Result 3344 states and 11103 transitions. [2022-02-15 13:07:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:07:09,201 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:09,208 INFO L225 Difference]: With dead ends: 3344 [2022-02-15 13:07:09,208 INFO L226 Difference]: Without dead ends: 3330 [2022-02-15 13:07:09,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:07:09,209 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 171 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:09,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 127 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:09,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2022-02-15 13:07:09,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2210. [2022-02-15 13:07:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2209 states have (on average 3.5224083295608875) internal successors, (7781), 2209 states have internal predecessors, (7781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 7781 transitions. [2022-02-15 13:07:09,251 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 7781 transitions. Word has length 21 [2022-02-15 13:07:09,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:09,251 INFO L470 AbstractCegarLoop]: Abstraction has 2210 states and 7781 transitions. [2022-02-15 13:07:09,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 7781 transitions. [2022-02-15 13:07:09,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:09,255 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:09,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:09,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-15 13:07:09,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-02-15 13:07:09,456 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:09,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1138059314, now seen corresponding path program 5 times [2022-02-15 13:07:09,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:09,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204351925] [2022-02-15 13:07:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:09,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:09,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:09,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:09,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204351925] [2022-02-15 13:07:09,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204351925] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:09,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702005663] [2022-02-15 13:07:09,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:09,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:09,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:09,509 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) [2022-02-15 13:07:09,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-15 13:07:09,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:07:09,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:09,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:07:09,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:09,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:09,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702005663] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:09,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:09,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-02-15 13:07:09,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167316065] [2022-02-15 13:07:09,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:09,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:07:09,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:09,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:07:09,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:07:09,706 INFO L87 Difference]: Start difference. First operand 2210 states and 7781 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:10,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:10,655 INFO L93 Difference]: Finished difference Result 6661 states and 21393 transitions. [2022-02-15 13:07:10,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:07:10,655 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:10,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:10,689 INFO L225 Difference]: With dead ends: 6661 [2022-02-15 13:07:10,689 INFO L226 Difference]: Without dead ends: 6647 [2022-02-15 13:07:10,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=740, Invalid=2340, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 13:07:10,690 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 361 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:10,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 300 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:07:10,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6647 states. [2022-02-15 13:07:10,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6647 to 2933. [2022-02-15 13:07:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2932 states have (on average 3.6306275579809) internal successors, (10645), 2932 states have internal predecessors, (10645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 10645 transitions. [2022-02-15 13:07:10,756 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 10645 transitions. Word has length 21 [2022-02-15 13:07:10,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:10,756 INFO L470 AbstractCegarLoop]: Abstraction has 2933 states and 10645 transitions. [2022-02-15 13:07:10,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:10,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 10645 transitions. [2022-02-15 13:07:10,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:10,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:10,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:10,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:10,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:10,977 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:10,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:10,977 INFO L85 PathProgramCache]: Analyzing trace with hash -369540942, now seen corresponding path program 7 times [2022-02-15 13:07:10,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:10,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767544898] [2022-02-15 13:07:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:10,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:11,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:11,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767544898] [2022-02-15 13:07:11,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767544898] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:11,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050232981] [2022-02-15 13:07:11,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:11,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:11,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:11,016 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) [2022-02-15 13:07:11,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-15 13:07:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:11,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:07:11,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:11,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:11,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050232981] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:11,193 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:11,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-02-15 13:07:11,193 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65763822] [2022-02-15 13:07:11,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:11,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:11,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:11,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:11,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:11,194 INFO L87 Difference]: Start difference. First operand 2933 states and 10645 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:11,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:11,667 INFO L93 Difference]: Finished difference Result 3680 states and 12565 transitions. [2022-02-15 13:07:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 13:07:11,667 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:11,675 INFO L225 Difference]: With dead ends: 3680 [2022-02-15 13:07:11,675 INFO L226 Difference]: Without dead ends: 3672 [2022-02-15 13:07:11,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:07:11,676 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 143 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:11,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 223 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:11,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2022-02-15 13:07:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 2993. [2022-02-15 13:07:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2992 states have (on average 3.615975935828877) internal successors, (10819), 2992 states have internal predecessors, (10819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 10819 transitions. [2022-02-15 13:07:11,726 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 10819 transitions. Word has length 21 [2022-02-15 13:07:11,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:11,727 INFO L470 AbstractCegarLoop]: Abstraction has 2993 states and 10819 transitions. [2022-02-15 13:07:11,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 10819 transitions. [2022-02-15 13:07:11,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:11,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:11,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:11,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-15 13:07:11,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-02-15 13:07:11,948 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:11,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:11,948 INFO L85 PathProgramCache]: Analyzing trace with hash 78717418, now seen corresponding path program 8 times [2022-02-15 13:07:11,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:11,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700351616] [2022-02-15 13:07:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:11,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:11,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:11,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700351616] [2022-02-15 13:07:11,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700351616] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:11,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593323847] [2022-02-15 13:07:11,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:11,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:11,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:11,991 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) [2022-02-15 13:07:11,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-15 13:07:12,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:12,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:12,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:07:12,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:12,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:12,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593323847] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:12,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:12,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-02-15 13:07:12,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337730636] [2022-02-15 13:07:12,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:12,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:07:12,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:12,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:07:12,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:07:12,208 INFO L87 Difference]: Start difference. First operand 2993 states and 10819 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:12,878 INFO L93 Difference]: Finished difference Result 4006 states and 13387 transitions. [2022-02-15 13:07:12,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 13:07:12,879 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:12,885 INFO L225 Difference]: With dead ends: 4006 [2022-02-15 13:07:12,885 INFO L226 Difference]: Without dead ends: 3998 [2022-02-15 13:07:12,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=459, Invalid=1611, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 13:07:12,887 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 237 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:12,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 195 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:07:12,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3998 states. [2022-02-15 13:07:12,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3998 to 3031. [2022-02-15 13:07:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 3030 states have (on average 3.613201320132013) internal successors, (10948), 3030 states have internal predecessors, (10948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 10948 transitions. [2022-02-15 13:07:12,933 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 10948 transitions. Word has length 21 [2022-02-15 13:07:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:12,933 INFO L470 AbstractCegarLoop]: Abstraction has 3031 states and 10948 transitions. [2022-02-15 13:07:12,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 10948 transitions. [2022-02-15 13:07:12,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:12,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:12,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:12,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:13,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:13,153 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:13,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:13,154 INFO L85 PathProgramCache]: Analyzing trace with hash -48158230, now seen corresponding path program 9 times [2022-02-15 13:07:13,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:13,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036595037] [2022-02-15 13:07:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:13,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:13,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:13,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036595037] [2022-02-15 13:07:13,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036595037] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:13,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688815989] [2022-02-15 13:07:13,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:13,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:13,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:13,208 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) [2022-02-15 13:07:13,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-15 13:07:13,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 13:07:13,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:13,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:07:13,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:13,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:13,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:13,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688815989] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:13,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:13,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-02-15 13:07:13,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896038297] [2022-02-15 13:07:13,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:13,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:07:13,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:13,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:07:13,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:07:13,404 INFO L87 Difference]: Start difference. First operand 3031 states and 10948 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2022-02-15 13:07:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:13,986 INFO L93 Difference]: Finished difference Result 3847 states and 12978 transitions. [2022-02-15 13:07:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 13:07:13,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 21 [2022-02-15 13:07:13,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:13,994 INFO L225 Difference]: With dead ends: 3847 [2022-02-15 13:07:13,994 INFO L226 Difference]: Without dead ends: 3826 [2022-02-15 13:07:13,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=1278, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:07:13,995 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 188 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:13,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 287 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:07:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2022-02-15 13:07:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 2972. [2022-02-15 13:07:14,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 2971 states have (on average 3.6226859643217773) internal successors, (10763), 2971 states have internal predecessors, (10763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:14,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 10763 transitions. [2022-02-15 13:07:14,051 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 10763 transitions. Word has length 21 [2022-02-15 13:07:14,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:14,051 INFO L470 AbstractCegarLoop]: Abstraction has 2972 states and 10763 transitions. [2022-02-15 13:07:14,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2022-02-15 13:07:14,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 10763 transitions. [2022-02-15 13:07:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:14,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:14,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:14,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:14,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-02-15 13:07:14,271 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:14,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:14,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1428493522, now seen corresponding path program 10 times [2022-02-15 13:07:14,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:14,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761460058] [2022-02-15 13:07:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:14,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:14,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:14,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761460058] [2022-02-15 13:07:14,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761460058] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:14,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921491057] [2022-02-15 13:07:14,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:14,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:14,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:14,312 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) [2022-02-15 13:07:14,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-15 13:07:14,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:14,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:14,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:07:14,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:14,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:14,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921491057] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:14,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:14,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-02-15 13:07:14,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542441350] [2022-02-15 13:07:14,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:14,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:14,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:14,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:14,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:14,524 INFO L87 Difference]: Start difference. First operand 2972 states and 10763 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:15,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:15,239 INFO L93 Difference]: Finished difference Result 4280 states and 14653 transitions. [2022-02-15 13:07:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 13:07:15,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:15,248 INFO L225 Difference]: With dead ends: 4280 [2022-02-15 13:07:15,248 INFO L226 Difference]: Without dead ends: 4272 [2022-02-15 13:07:15,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=1225, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:07:15,248 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 151 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:15,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 315 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:07:15,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4272 states. [2022-02-15 13:07:15,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4272 to 2956. [2022-02-15 13:07:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 3.632148900169205) internal successors, (10733), 2955 states have internal predecessors, (10733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 10733 transitions. [2022-02-15 13:07:15,305 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 10733 transitions. Word has length 21 [2022-02-15 13:07:15,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:15,305 INFO L470 AbstractCegarLoop]: Abstraction has 2956 states and 10733 transitions. [2022-02-15 13:07:15,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 10733 transitions. [2022-02-15 13:07:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:15,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:15,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:15,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:15,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-02-15 13:07:15,512 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:15,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:15,512 INFO L85 PathProgramCache]: Analyzing trace with hash -981882646, now seen corresponding path program 6 times [2022-02-15 13:07:15,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:15,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915181791] [2022-02-15 13:07:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:15,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:15,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:15,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915181791] [2022-02-15 13:07:15,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915181791] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:15,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40134523] [2022-02-15 13:07:15,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:15,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:15,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:15,560 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) [2022-02-15 13:07:15,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-15 13:07:15,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:07:15,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:15,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:07:15,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:15,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:15,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40134523] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:15,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:15,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-02-15 13:07:15,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728832929] [2022-02-15 13:07:15,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:15,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:07:15,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:15,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:07:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:07:15,733 INFO L87 Difference]: Start difference. First operand 2956 states and 10733 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:16,724 INFO L93 Difference]: Finished difference Result 5648 states and 18229 transitions. [2022-02-15 13:07:16,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 13:07:16,724 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:16,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:16,736 INFO L225 Difference]: With dead ends: 5648 [2022-02-15 13:07:16,736 INFO L226 Difference]: Without dead ends: 5608 [2022-02-15 13:07:16,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=775, Invalid=3131, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 13:07:16,737 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 461 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:16,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 263 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:07:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5608 states. [2022-02-15 13:07:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5608 to 2636. [2022-02-15 13:07:16,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 2635 states have (on average 3.5874762808349145) internal successors, (9453), 2635 states have internal predecessors, (9453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 9453 transitions. [2022-02-15 13:07:16,817 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 9453 transitions. Word has length 21 [2022-02-15 13:07:16,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:16,817 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 9453 transitions. [2022-02-15 13:07:16,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 9453 transitions. [2022-02-15 13:07:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:16,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:16,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:16,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-02-15 13:07:17,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-15 13:07:17,038 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:17,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:17,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1147980128, now seen corresponding path program 7 times [2022-02-15 13:07:17,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:17,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794320094] [2022-02-15 13:07:17,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:17,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:17,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:17,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794320094] [2022-02-15 13:07:17,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794320094] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:17,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981233284] [2022-02-15 13:07:17,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:17,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:17,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:17,089 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) [2022-02-15 13:07:17,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-15 13:07:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:17,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:07:17,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:17,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:17,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981233284] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:17,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:17,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-02-15 13:07:17,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511756103] [2022-02-15 13:07:17,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:17,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:07:17,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:17,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:07:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:07:17,255 INFO L87 Difference]: Start difference. First operand 2636 states and 9453 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:18,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:18,055 INFO L93 Difference]: Finished difference Result 6339 states and 20851 transitions. [2022-02-15 13:07:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 13:07:18,055 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:18,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:18,069 INFO L225 Difference]: With dead ends: 6339 [2022-02-15 13:07:18,070 INFO L226 Difference]: Without dead ends: 6319 [2022-02-15 13:07:18,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=757, Invalid=2435, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 13:07:18,072 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 501 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:18,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 160 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6319 states. [2022-02-15 13:07:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6319 to 2792. [2022-02-15 13:07:18,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 3.637764242207094) internal successors, (10153), 2791 states have internal predecessors, (10153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 10153 transitions. [2022-02-15 13:07:18,159 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 10153 transitions. Word has length 21 [2022-02-15 13:07:18,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:18,159 INFO L470 AbstractCegarLoop]: Abstraction has 2792 states and 10153 transitions. [2022-02-15 13:07:18,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 10153 transitions. [2022-02-15 13:07:18,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:18,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:18,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:18,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:18,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-02-15 13:07:18,383 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:18,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash -169422684, now seen corresponding path program 8 times [2022-02-15 13:07:18,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:18,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142958573] [2022-02-15 13:07:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:18,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:18,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:18,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142958573] [2022-02-15 13:07:18,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142958573] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:18,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436283975] [2022-02-15 13:07:18,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:18,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:18,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:18,422 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) [2022-02-15 13:07:18,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-15 13:07:18,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:18,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:18,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:07:18,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:18,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:18,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436283975] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:18,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:18,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-02-15 13:07:18,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542457362] [2022-02-15 13:07:18,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:18,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:07:18,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:18,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:07:18,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:07:18,558 INFO L87 Difference]: Start difference. First operand 2792 states and 10153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2022-02-15 13:07:19,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:19,118 INFO L93 Difference]: Finished difference Result 6781 states and 22584 transitions. [2022-02-15 13:07:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 13:07:19,118 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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 21 [2022-02-15 13:07:19,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:19,133 INFO L225 Difference]: With dead ends: 6781 [2022-02-15 13:07:19,133 INFO L226 Difference]: Without dead ends: 6781 [2022-02-15 13:07:19,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=604, Invalid=1652, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 13:07:19,133 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 438 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:19,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 156 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6781 states. [2022-02-15 13:07:19,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6781 to 2837. [2022-02-15 13:07:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2836 states have (on average 3.6361071932299014) internal successors, (10312), 2836 states have internal predecessors, (10312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 10312 transitions. [2022-02-15 13:07:19,209 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 10312 transitions. Word has length 21 [2022-02-15 13:07:19,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:19,209 INFO L470 AbstractCegarLoop]: Abstraction has 2837 states and 10312 transitions. [2022-02-15 13:07:19,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 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) [2022-02-15 13:07:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 10312 transitions. [2022-02-15 13:07:19,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:19,214 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:19,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:19,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-02-15 13:07:19,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-02-15 13:07:19,428 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:19,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:19,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1853295848, now seen corresponding path program 9 times [2022-02-15 13:07:19,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:19,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200912917] [2022-02-15 13:07:19,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:19,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:19,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:19,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200912917] [2022-02-15 13:07:19,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200912917] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:19,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753359952] [2022-02-15 13:07:19,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:19,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:19,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:19,468 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) [2022-02-15 13:07:19,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-15 13:07:19,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 13:07:19,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:19,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:07:19,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:19,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:19,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753359952] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:19,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:19,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-02-15 13:07:19,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818751664] [2022-02-15 13:07:19,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:19,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:07:19,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:19,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:07:19,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:07:19,621 INFO L87 Difference]: Start difference. First operand 2837 states and 10312 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:20,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:20,207 INFO L93 Difference]: Finished difference Result 4771 states and 15849 transitions. [2022-02-15 13:07:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:07:20,208 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:20,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:20,217 INFO L225 Difference]: With dead ends: 4771 [2022-02-15 13:07:20,218 INFO L226 Difference]: Without dead ends: 4751 [2022-02-15 13:07:20,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:07:20,218 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 277 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:20,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 166 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:20,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2022-02-15 13:07:20,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 2847. [2022-02-15 13:07:20,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 3.635628952916374) internal successors, (10347), 2846 states have internal predecessors, (10347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 10347 transitions. [2022-02-15 13:07:20,295 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 10347 transitions. Word has length 21 [2022-02-15 13:07:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:20,295 INFO L470 AbstractCegarLoop]: Abstraction has 2847 states and 10347 transitions. [2022-02-15 13:07:20,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:20,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 10347 transitions. [2022-02-15 13:07:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:20,300 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:20,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:20,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-02-15 13:07:20,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-02-15 13:07:20,515 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:20,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:20,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1140493464, now seen corresponding path program 10 times [2022-02-15 13:07:20,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:20,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043784814] [2022-02-15 13:07:20,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:20,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:20,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:20,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043784814] [2022-02-15 13:07:20,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043784814] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:20,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653481556] [2022-02-15 13:07:20,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:20,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:20,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:20,545 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:20,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-15 13:07:20,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:20,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:20,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:07:20,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:20,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:20,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653481556] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:20,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:20,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-02-15 13:07:20,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187727746] [2022-02-15 13:07:20,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:20,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:07:20,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:20,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:07:20,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:07:20,726 INFO L87 Difference]: Start difference. First operand 2847 states and 10347 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:21,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:21,389 INFO L93 Difference]: Finished difference Result 4772 states and 15704 transitions. [2022-02-15 13:07:21,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 13:07:21,389 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:21,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:21,399 INFO L225 Difference]: With dead ends: 4772 [2022-02-15 13:07:21,399 INFO L226 Difference]: Without dead ends: 4744 [2022-02-15 13:07:21,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=613, Invalid=1739, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 13:07:21,400 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 304 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:21,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 149 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:07:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2022-02-15 13:07:21,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 2845. [2022-02-15 13:07:21,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 3.6353727144866386) internal successors, (10339), 2844 states have internal predecessors, (10339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:21,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 10339 transitions. [2022-02-15 13:07:21,452 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 10339 transitions. Word has length 21 [2022-02-15 13:07:21,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:21,452 INFO L470 AbstractCegarLoop]: Abstraction has 2845 states and 10339 transitions. [2022-02-15 13:07:21,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:21,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 10339 transitions. [2022-02-15 13:07:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:21,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:21,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:21,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-02-15 13:07:21,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-02-15 13:07:21,673 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:21,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:21,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1138871444, now seen corresponding path program 11 times [2022-02-15 13:07:21,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:21,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764073190] [2022-02-15 13:07:21,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:21,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:21,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:21,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764073190] [2022-02-15 13:07:21,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764073190] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:21,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159015141] [2022-02-15 13:07:21,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:21,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:21,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:21,695 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:21,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-15 13:07:21,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:07:21,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:21,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:07:21,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:21,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:21,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159015141] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:21,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:21,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-02-15 13:07:21,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320756847] [2022-02-15 13:07:21,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:21,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:07:21,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:21,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:07:21,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:07:21,859 INFO L87 Difference]: Start difference. First operand 2845 states and 10339 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:22,482 INFO L93 Difference]: Finished difference Result 6771 states and 22668 transitions. [2022-02-15 13:07:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 13:07:22,482 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:22,495 INFO L225 Difference]: With dead ends: 6771 [2022-02-15 13:07:22,495 INFO L226 Difference]: Without dead ends: 6771 [2022-02-15 13:07:22,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=479, Invalid=1081, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:07:22,496 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 245 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:22,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 172 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:22,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6771 states. [2022-02-15 13:07:22,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6771 to 2907. [2022-02-15 13:07:22,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 2906 states have (on average 3.6593255333792154) internal successors, (10634), 2906 states have internal predecessors, (10634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:22,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 10634 transitions. [2022-02-15 13:07:22,559 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 10634 transitions. Word has length 21 [2022-02-15 13:07:22,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:22,559 INFO L470 AbstractCegarLoop]: Abstraction has 2907 states and 10634 transitions. [2022-02-15 13:07:22,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:22,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 10634 transitions. [2022-02-15 13:07:22,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 13:07:22,564 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:22,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:22,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-02-15 13:07:22,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:22,771 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:22,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:22,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1036153892, now seen corresponding path program 12 times [2022-02-15 13:07:22,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:22,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765731778] [2022-02-15 13:07:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:22,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:22,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:22,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765731778] [2022-02-15 13:07:22,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765731778] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:22,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554350904] [2022-02-15 13:07:22,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:22,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:22,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:22,814 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:22,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-15 13:07:22,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-15 13:07:22,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:22,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:07:22,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:22,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:22,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554350904] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:22,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:22,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-02-15 13:07:22,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986550] [2022-02-15 13:07:22,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:22,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:07:22,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:22,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:07:22,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:07:22,961 INFO L87 Difference]: Start difference. First operand 2907 states and 10634 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:23,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:23,512 INFO L93 Difference]: Finished difference Result 5977 states and 19851 transitions. [2022-02-15 13:07:23,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 13:07:23,512 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-02-15 13:07:23,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:23,524 INFO L225 Difference]: With dead ends: 5977 [2022-02-15 13:07:23,524 INFO L226 Difference]: Without dead ends: 5951 [2022-02-15 13:07:23,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 13:07:23,525 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 253 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:23,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 199 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2022-02-15 13:07:23,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 2903. [2022-02-15 13:07:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 3.6574776016540316) internal successors, (10614), 2902 states have internal predecessors, (10614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 10614 transitions. [2022-02-15 13:07:23,589 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 10614 transitions. Word has length 21 [2022-02-15 13:07:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:23,590 INFO L470 AbstractCegarLoop]: Abstraction has 2903 states and 10614 transitions. [2022-02-15 13:07:23,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 10614 transitions. [2022-02-15 13:07:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:07:23,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:23,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:23,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:23,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-02-15 13:07:23,809 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:23,810 INFO L85 PathProgramCache]: Analyzing trace with hash 766836878, now seen corresponding path program 20 times [2022-02-15 13:07:23,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:23,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027974629] [2022-02-15 13:07:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:23,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:23,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:23,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027974629] [2022-02-15 13:07:23,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027974629] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:23,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945367352] [2022-02-15 13:07:23,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:23,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:23,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:23,843 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:23,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-15 13:07:23,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:23,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:23,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:07:23,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:24,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:24,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945367352] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:24,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:24,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 10 [2022-02-15 13:07:24,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544448720] [2022-02-15 13:07:24,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:24,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:07:24,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:24,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:07:24,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:07:24,157 INFO L87 Difference]: Start difference. First operand 2903 states and 10614 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:24,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:24,266 INFO L93 Difference]: Finished difference Result 4177 states and 14782 transitions. [2022-02-15 13:07:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:07:24,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:07:24,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:24,275 INFO L225 Difference]: With dead ends: 4177 [2022-02-15 13:07:24,275 INFO L226 Difference]: Without dead ends: 4147 [2022-02-15 13:07:24,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:07:24,275 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 87 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:24,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 252 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:24,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2022-02-15 13:07:24,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 3663. [2022-02-15 13:07:24,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 3.671764063353359) internal successors, (13446), 3662 states have internal predecessors, (13446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:24,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 13446 transitions. [2022-02-15 13:07:24,334 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 13446 transitions. Word has length 23 [2022-02-15 13:07:24,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:24,334 INFO L470 AbstractCegarLoop]: Abstraction has 3663 states and 13446 transitions. [2022-02-15 13:07:24,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:24,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 13446 transitions. [2022-02-15 13:07:24,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:07:24,340 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:24,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:24,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-02-15 13:07:24,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:24,546 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:24,546 INFO L85 PathProgramCache]: Analyzing trace with hash 728482628, now seen corresponding path program 21 times [2022-02-15 13:07:24,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:24,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513212292] [2022-02-15 13:07:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:24,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:24,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:24,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513212292] [2022-02-15 13:07:24,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513212292] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:24,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077549599] [2022-02-15 13:07:24,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:24,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:24,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:24,611 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:24,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-15 13:07:24,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:07:24,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:24,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:07:24,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:24,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:07:24,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077549599] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:24,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:24,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 10 [2022-02-15 13:07:24,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565084692] [2022-02-15 13:07:24,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:24,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:07:24,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:24,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:07:24,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:07:24,903 INFO L87 Difference]: Start difference. First operand 3663 states and 13446 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:25,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:25,022 INFO L93 Difference]: Finished difference Result 4935 states and 17632 transitions. [2022-02-15 13:07:25,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:07:25,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:07:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:25,033 INFO L225 Difference]: With dead ends: 4935 [2022-02-15 13:07:25,033 INFO L226 Difference]: Without dead ends: 4886 [2022-02-15 13:07:25,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:07:25,034 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 80 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:25,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 301 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4886 states. [2022-02-15 13:07:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4886 to 4276. [2022-02-15 13:07:25,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4276 states, 4275 states have (on average 3.705497076023392) internal successors, (15841), 4275 states have internal predecessors, (15841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 15841 transitions. [2022-02-15 13:07:25,110 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 15841 transitions. Word has length 23 [2022-02-15 13:07:25,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:25,110 INFO L470 AbstractCegarLoop]: Abstraction has 4276 states and 15841 transitions. [2022-02-15 13:07:25,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:25,110 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 15841 transitions. [2022-02-15 13:07:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:07:25,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:25,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:25,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-02-15 13:07:25,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:25,331 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:25,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:25,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1508260362, now seen corresponding path program 13 times [2022-02-15 13:07:25,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:25,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346432375] [2022-02-15 13:07:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:25,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:25,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:25,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346432375] [2022-02-15 13:07:25,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346432375] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:25,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293229628] [2022-02-15 13:07:25,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:25,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:25,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:25,403 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:25,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-15 13:07:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:25,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-15 13:07:25,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:25,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:07:25,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293229628] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:25,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:25,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 12 [2022-02-15 13:07:25,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483797390] [2022-02-15 13:07:25,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:25,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:07:25,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:25,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:07:25,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:07:25,683 INFO L87 Difference]: Start difference. First operand 4276 states and 15841 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:25,815 INFO L93 Difference]: Finished difference Result 5177 states and 18578 transitions. [2022-02-15 13:07:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:07:25,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-15 13:07:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:25,825 INFO L225 Difference]: With dead ends: 5177 [2022-02-15 13:07:25,826 INFO L226 Difference]: Without dead ends: 5147 [2022-02-15 13:07:25,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:07:25,826 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 109 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:25,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 192 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:25,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2022-02-15 13:07:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 4699. [2022-02-15 13:07:25,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4699 states, 4698 states have (on average 3.691996594295445) internal successors, (17345), 4698 states have internal predecessors, (17345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4699 states to 4699 states and 17345 transitions. [2022-02-15 13:07:25,903 INFO L78 Accepts]: Start accepts. Automaton has 4699 states and 17345 transitions. Word has length 23 [2022-02-15 13:07:25,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:25,903 INFO L470 AbstractCegarLoop]: Abstraction has 4699 states and 17345 transitions. [2022-02-15 13:07:25,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4699 states and 17345 transitions. [2022-02-15 13:07:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:25,911 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:25,911 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:25,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:26,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-02-15 13:07:26,127 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:26,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:26,127 INFO L85 PathProgramCache]: Analyzing trace with hash -160336528, now seen corresponding path program 22 times [2022-02-15 13:07:26,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:26,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102826918] [2022-02-15 13:07:26,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:26,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:26,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:26,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102826918] [2022-02-15 13:07:26,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102826918] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:26,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784732766] [2022-02-15 13:07:26,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:26,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:26,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:26,172 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:26,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-15 13:07:26,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:26,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:26,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:07:26,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:26,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:26,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784732766] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:26,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:26,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-15 13:07:26,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149839759] [2022-02-15 13:07:26,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:26,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:07:26,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:26,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:07:26,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:07:26,360 INFO L87 Difference]: Start difference. First operand 4699 states and 17345 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:26,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:26,634 INFO L93 Difference]: Finished difference Result 8376 states and 29016 transitions. [2022-02-15 13:07:26,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:07:26,634 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:26,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:26,653 INFO L225 Difference]: With dead ends: 8376 [2022-02-15 13:07:26,653 INFO L226 Difference]: Without dead ends: 8376 [2022-02-15 13:07:26,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:07:26,653 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 238 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:26,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 151 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:07:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2022-02-15 13:07:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 5256. [2022-02-15 13:07:26,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 5255 states have (on average 3.7069457659372027) internal successors, (19480), 5255 states have internal predecessors, (19480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:26,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 19480 transitions. [2022-02-15 13:07:26,821 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 19480 transitions. Word has length 25 [2022-02-15 13:07:26,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:26,821 INFO L470 AbstractCegarLoop]: Abstraction has 5256 states and 19480 transitions. [2022-02-15 13:07:26,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:26,821 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 19480 transitions. [2022-02-15 13:07:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:26,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:26,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:26,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:27,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-02-15 13:07:27,043 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:27,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:27,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1841814858, now seen corresponding path program 14 times [2022-02-15 13:07:27,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:27,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885289998] [2022-02-15 13:07:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:27,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:27,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:27,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885289998] [2022-02-15 13:07:27,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885289998] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:27,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333441165] [2022-02-15 13:07:27,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:27,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:27,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:27,091 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:27,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-15 13:07:27,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:27,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:27,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:27,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:27,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:27,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333441165] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:27,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:27,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-15 13:07:27,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699796696] [2022-02-15 13:07:27,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:27,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:07:27,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:27,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:07:27,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:07:27,354 INFO L87 Difference]: Start difference. First operand 5256 states and 19480 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:28,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:28,031 INFO L93 Difference]: Finished difference Result 16483 states and 56277 transitions. [2022-02-15 13:07:28,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 13:07:28,032 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:28,074 INFO L225 Difference]: With dead ends: 16483 [2022-02-15 13:07:28,074 INFO L226 Difference]: Without dead ends: 16469 [2022-02-15 13:07:28,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:07:28,075 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 285 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:28,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 238 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:07:28,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16469 states. [2022-02-15 13:07:28,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16469 to 7242. [2022-02-15 13:07:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 7241 states have (on average 3.7090180914238364) internal successors, (26857), 7241 states have internal predecessors, (26857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 26857 transitions. [2022-02-15 13:07:28,312 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 26857 transitions. Word has length 25 [2022-02-15 13:07:28,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:28,312 INFO L470 AbstractCegarLoop]: Abstraction has 7242 states and 26857 transitions. [2022-02-15 13:07:28,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:28,312 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 26857 transitions. [2022-02-15 13:07:28,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:28,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:28,325 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:28,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:28,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-02-15 13:07:28,541 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:28,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1366799892, now seen corresponding path program 23 times [2022-02-15 13:07:28,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:28,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788233398] [2022-02-15 13:07:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:28,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:28,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:28,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788233398] [2022-02-15 13:07:28,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788233398] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:28,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268288029] [2022-02-15 13:07:28,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:28,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:28,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:28,596 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:28,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-15 13:07:28,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:07:28,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:28,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:07:28,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:28,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:28,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268288029] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:28,895 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:28,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-15 13:07:28,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658070368] [2022-02-15 13:07:28,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:28,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:28,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:28,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:28,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:28,896 INFO L87 Difference]: Start difference. First operand 7242 states and 26857 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:30,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:30,081 INFO L93 Difference]: Finished difference Result 11227 states and 38311 transitions. [2022-02-15 13:07:30,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 13:07:30,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:30,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:30,108 INFO L225 Difference]: With dead ends: 11227 [2022-02-15 13:07:30,108 INFO L226 Difference]: Without dead ends: 11149 [2022-02-15 13:07:30,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1184, Invalid=3928, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 13:07:30,109 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 448 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:30,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 295 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:07:30,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11149 states. [2022-02-15 13:07:30,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11149 to 7430. [2022-02-15 13:07:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.7025171624713957) internal successors, (27506), 7429 states have internal predecessors, (27506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 27506 transitions. [2022-02-15 13:07:30,307 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 27506 transitions. Word has length 25 [2022-02-15 13:07:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:30,307 INFO L470 AbstractCegarLoop]: Abstraction has 7430 states and 27506 transitions. [2022-02-15 13:07:30,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:30,307 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 27506 transitions. [2022-02-15 13:07:30,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:30,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:30,319 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:30,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-02-15 13:07:30,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-15 13:07:30,525 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:30,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1557416792, now seen corresponding path program 24 times [2022-02-15 13:07:30,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:30,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691044756] [2022-02-15 13:07:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:30,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:30,569 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:30,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691044756] [2022-02-15 13:07:30,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691044756] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:30,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810055728] [2022-02-15 13:07:30,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:30,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:30,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:30,570 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:30,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-15 13:07:30,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:07:30,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:30,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:07:30,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:30,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:30,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810055728] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:30,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:30,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-15 13:07:30,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214215363] [2022-02-15 13:07:30,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:30,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:30,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:30,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:30,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:30,823 INFO L87 Difference]: Start difference. First operand 7430 states and 27506 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:32,898 INFO L93 Difference]: Finished difference Result 13553 states and 44980 transitions. [2022-02-15 13:07:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-15 13:07:32,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:32,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:32,929 INFO L225 Difference]: With dead ends: 13553 [2022-02-15 13:07:32,929 INFO L226 Difference]: Without dead ends: 13553 [2022-02-15 13:07:32,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5966 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3518, Invalid=11244, Unknown=0, NotChecked=0, Total=14762 [2022-02-15 13:07:32,930 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 631 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:32,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 302 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:07:32,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13553 states. [2022-02-15 13:07:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13553 to 7458. [2022-02-15 13:07:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7458 states, 7457 states have (on average 3.7017567386348396) internal successors, (27604), 7457 states have internal predecessors, (27604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 27604 transitions. [2022-02-15 13:07:33,130 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 27604 transitions. Word has length 25 [2022-02-15 13:07:33,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:33,131 INFO L470 AbstractCegarLoop]: Abstraction has 7458 states and 27604 transitions. [2022-02-15 13:07:33,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:33,131 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 27604 transitions. [2022-02-15 13:07:33,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:33,146 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:33,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:33,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:33,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-15 13:07:33,359 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:33,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:33,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1325882792, now seen corresponding path program 15 times [2022-02-15 13:07:33,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:33,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895912015] [2022-02-15 13:07:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:33,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:33,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:33,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895912015] [2022-02-15 13:07:33,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895912015] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:33,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922298120] [2022-02-15 13:07:33,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:33,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:33,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:33,392 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:33,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-15 13:07:33,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:07:33,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:33,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:33,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:33,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:33,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922298120] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:33,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:33,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-15 13:07:33,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946011612] [2022-02-15 13:07:33,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:33,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:07:33,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:33,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:07:33,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:07:33,642 INFO L87 Difference]: Start difference. First operand 7458 states and 27604 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-02-15 13:07:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:34,875 INFO L93 Difference]: Finished difference Result 18954 states and 64865 transitions. [2022-02-15 13:07:34,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 13:07:34,875 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 25 [2022-02-15 13:07:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:34,923 INFO L225 Difference]: With dead ends: 18954 [2022-02-15 13:07:34,923 INFO L226 Difference]: Without dead ends: 18932 [2022-02-15 13:07:34,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1214, Invalid=4638, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 13:07:34,924 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 398 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:34,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 344 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:07:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18932 states. [2022-02-15 13:07:35,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18932 to 8787. [2022-02-15 13:07:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8787 states, 8786 states have (on average 3.766332802185295) internal successors, (33091), 8786 states have internal predecessors, (33091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8787 states to 8787 states and 33091 transitions. [2022-02-15 13:07:35,173 INFO L78 Accepts]: Start accepts. Automaton has 8787 states and 33091 transitions. Word has length 25 [2022-02-15 13:07:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:35,173 INFO L470 AbstractCegarLoop]: Abstraction has 8787 states and 33091 transitions. [2022-02-15 13:07:35,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-02-15 13:07:35,173 INFO L276 IsEmpty]: Start isEmpty. Operand 8787 states and 33091 transitions. [2022-02-15 13:07:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:35,187 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:35,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:35,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:35,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:35,403 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:35,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:35,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1990527060, now seen corresponding path program 16 times [2022-02-15 13:07:35,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:35,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197912364] [2022-02-15 13:07:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:35,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:35,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:35,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197912364] [2022-02-15 13:07:35,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197912364] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:35,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699991516] [2022-02-15 13:07:35,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:35,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:35,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:35,460 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:35,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-15 13:07:35,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:35,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:35,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:07:35,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:35,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:35,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699991516] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:35,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:35,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-15 13:07:35,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845127228] [2022-02-15 13:07:35,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:35,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:07:35,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:35,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:07:35,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:07:35,711 INFO L87 Difference]: Start difference. First operand 8787 states and 33091 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:37,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:37,037 INFO L93 Difference]: Finished difference Result 21846 states and 74430 transitions. [2022-02-15 13:07:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:07:37,038 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:37,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:37,088 INFO L225 Difference]: With dead ends: 21846 [2022-02-15 13:07:37,089 INFO L226 Difference]: Without dead ends: 21804 [2022-02-15 13:07:37,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=954, Invalid=3206, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:07:37,090 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 353 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:37,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 459 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:07:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21804 states. [2022-02-15 13:07:37,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21804 to 7140. [2022-02-15 13:07:37,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 7139 states have (on average 3.7089228183218936) internal successors, (26478), 7139 states have internal predecessors, (26478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:37,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 26478 transitions. [2022-02-15 13:07:37,403 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 26478 transitions. Word has length 25 [2022-02-15 13:07:37,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:37,403 INFO L470 AbstractCegarLoop]: Abstraction has 7140 states and 26478 transitions. [2022-02-15 13:07:37,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:37,403 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 26478 transitions. [2022-02-15 13:07:37,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:37,414 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:37,414 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:37,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:37,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:37,623 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:37,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:37,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1684292440, now seen corresponding path program 25 times [2022-02-15 13:07:37,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:37,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884458429] [2022-02-15 13:07:37,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:37,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:37,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:37,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884458429] [2022-02-15 13:07:37,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884458429] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:37,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811605688] [2022-02-15 13:07:37,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:37,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:37,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:37,671 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:37,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-15 13:07:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:37,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:07:37,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:37,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:37,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811605688] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:37,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:37,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-15 13:07:37,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11102739] [2022-02-15 13:07:37,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:37,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:37,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:37,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:37,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:37,948 INFO L87 Difference]: Start difference. First operand 7140 states and 26478 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:39,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:39,219 INFO L93 Difference]: Finished difference Result 11568 states and 38925 transitions. [2022-02-15 13:07:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 13:07:39,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:39,247 INFO L225 Difference]: With dead ends: 11568 [2022-02-15 13:07:39,247 INFO L226 Difference]: Without dead ends: 11533 [2022-02-15 13:07:39,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1690, Invalid=5116, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 13:07:39,249 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 542 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:39,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 289 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:07:39,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11533 states. [2022-02-15 13:07:39,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11533 to 7088. [2022-02-15 13:07:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7088 states, 7087 states have (on average 3.709891350359814) internal successors, (26292), 7087 states have internal predecessors, (26292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7088 states to 7088 states and 26292 transitions. [2022-02-15 13:07:39,483 INFO L78 Accepts]: Start accepts. Automaton has 7088 states and 26292 transitions. Word has length 25 [2022-02-15 13:07:39,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:39,483 INFO L470 AbstractCegarLoop]: Abstraction has 7088 states and 26292 transitions. [2022-02-15 13:07:39,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:39,483 INFO L276 IsEmpty]: Start isEmpty. Operand 7088 states and 26292 transitions. [2022-02-15 13:07:39,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:39,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:39,495 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:39,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-02-15 13:07:39,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:39,710 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:39,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:39,710 INFO L85 PathProgramCache]: Analyzing trace with hash 774400428, now seen corresponding path program 26 times [2022-02-15 13:07:39,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:39,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062478962] [2022-02-15 13:07:39,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:39,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:39,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:39,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062478962] [2022-02-15 13:07:39,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062478962] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:39,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179867206] [2022-02-15 13:07:39,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:39,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:39,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:39,754 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:39,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-15 13:07:39,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:39,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:39,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:07:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:39,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:40,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179867206] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:40,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:40,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-15 13:07:40,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458233272] [2022-02-15 13:07:40,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:40,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:40,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:40,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:40,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:40,011 INFO L87 Difference]: Start difference. First operand 7088 states and 26292 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:40,990 INFO L93 Difference]: Finished difference Result 11527 states and 38863 transitions. [2022-02-15 13:07:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 13:07:40,991 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:40,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:41,017 INFO L225 Difference]: With dead ends: 11527 [2022-02-15 13:07:41,017 INFO L226 Difference]: Without dead ends: 11443 [2022-02-15 13:07:41,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1490, Invalid=4830, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 13:07:41,018 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 480 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:41,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 278 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:07:41,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11443 states. [2022-02-15 13:07:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11443 to 7218. [2022-02-15 13:07:41,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 3.6953027573784123) internal successors, (26669), 7217 states have internal predecessors, (26669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 26669 transitions. [2022-02-15 13:07:41,260 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 26669 transitions. Word has length 25 [2022-02-15 13:07:41,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:41,261 INFO L470 AbstractCegarLoop]: Abstraction has 7218 states and 26669 transitions. [2022-02-15 13:07:41,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:41,261 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 26669 transitions. [2022-02-15 13:07:41,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:41,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:41,273 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:41,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-02-15 13:07:41,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:41,487 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:41,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:41,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1196321260, now seen corresponding path program 27 times [2022-02-15 13:07:41,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:41,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414479759] [2022-02-15 13:07:41,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:41,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:41,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:41,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414479759] [2022-02-15 13:07:41,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414479759] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:41,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310455115] [2022-02-15 13:07:41,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:41,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:41,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:41,554 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:41,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-15 13:07:41,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:07:41,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:41,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:07:41,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:41,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:41,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310455115] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:41,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:41,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-15 13:07:41,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776808776] [2022-02-15 13:07:41,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:41,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:41,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:41,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:41,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:41,758 INFO L87 Difference]: Start difference. First operand 7218 states and 26669 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:42,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:42,849 INFO L93 Difference]: Finished difference Result 11296 states and 38475 transitions. [2022-02-15 13:07:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 13:07:42,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:42,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:42,877 INFO L225 Difference]: With dead ends: 11296 [2022-02-15 13:07:42,877 INFO L226 Difference]: Without dead ends: 11218 [2022-02-15 13:07:42,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1184, Invalid=3928, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 13:07:42,879 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 501 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:42,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 244 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:07:42,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11218 states. [2022-02-15 13:07:43,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11218 to 7595. [2022-02-15 13:07:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7595 states, 7594 states have (on average 3.6906768501448513) internal successors, (28027), 7594 states have internal predecessors, (28027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:43,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7595 states to 7595 states and 28027 transitions. [2022-02-15 13:07:43,062 INFO L78 Accepts]: Start accepts. Automaton has 7595 states and 28027 transitions. Word has length 25 [2022-02-15 13:07:43,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:43,063 INFO L470 AbstractCegarLoop]: Abstraction has 7595 states and 28027 transitions. [2022-02-15 13:07:43,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:43,063 INFO L276 IsEmpty]: Start isEmpty. Operand 7595 states and 28027 transitions. [2022-02-15 13:07:43,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:43,076 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:43,076 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:43,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:43,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-15 13:07:43,292 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:43,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:43,292 INFO L85 PathProgramCache]: Analyzing trace with hash 609334184, now seen corresponding path program 28 times [2022-02-15 13:07:43,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:43,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350536752] [2022-02-15 13:07:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:43,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:43,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:43,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350536752] [2022-02-15 13:07:43,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350536752] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:43,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614207987] [2022-02-15 13:07:43,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:43,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:43,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:43,346 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:43,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:43,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:43,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:07:43,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:43,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-15 13:07:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:43,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:43,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614207987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:43,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:43,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-15 13:07:43,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406233685] [2022-02-15 13:07:43,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:43,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:43,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:43,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:43,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:43,556 INFO L87 Difference]: Start difference. First operand 7595 states and 28027 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:45,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:45,014 INFO L93 Difference]: Finished difference Result 12317 states and 41373 transitions. [2022-02-15 13:07:45,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-15 13:07:45,014 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:45,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:45,041 INFO L225 Difference]: With dead ends: 12317 [2022-02-15 13:07:45,041 INFO L226 Difference]: Without dead ends: 12212 [2022-02-15 13:07:45,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1776, Invalid=5880, Unknown=0, NotChecked=0, Total=7656 [2022-02-15 13:07:45,043 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 570 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:45,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 276 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:07:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12212 states. [2022-02-15 13:07:45,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12212 to 7949. [2022-02-15 13:07:45,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7949 states, 7948 states have (on average 3.665450427780574) internal successors, (29133), 7948 states have internal predecessors, (29133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7949 states to 7949 states and 29133 transitions. [2022-02-15 13:07:45,218 INFO L78 Accepts]: Start accepts. Automaton has 7949 states and 29133 transitions. Word has length 25 [2022-02-15 13:07:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:45,218 INFO L470 AbstractCegarLoop]: Abstraction has 7949 states and 29133 transitions. [2022-02-15 13:07:45,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 7949 states and 29133 transitions. [2022-02-15 13:07:45,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:45,231 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:45,231 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:45,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-02-15 13:07:45,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-02-15 13:07:45,445 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:45,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:45,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1801800616, now seen corresponding path program 29 times [2022-02-15 13:07:45,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:45,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15288041] [2022-02-15 13:07:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:45,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:45,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:45,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15288041] [2022-02-15 13:07:45,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15288041] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:45,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772770509] [2022-02-15 13:07:45,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:45,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:45,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:45,498 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:45,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-15 13:07:45,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:07:45,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:45,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:07:45,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:45,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:45,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772770509] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:45,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:45,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-15 13:07:45,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67553190] [2022-02-15 13:07:45,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:45,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:45,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:45,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:45,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:45,753 INFO L87 Difference]: Start difference. First operand 7949 states and 29133 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:47,212 INFO L93 Difference]: Finished difference Result 12441 states and 41823 transitions. [2022-02-15 13:07:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 13:07:47,212 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:47,237 INFO L225 Difference]: With dead ends: 12441 [2022-02-15 13:07:47,238 INFO L226 Difference]: Without dead ends: 12392 [2022-02-15 13:07:47,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3281 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2096, Invalid=6460, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 13:07:47,239 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 615 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:47,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 277 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:07:47,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12392 states. [2022-02-15 13:07:47,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12392 to 8090. [2022-02-15 13:07:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8090 states, 8089 states have (on average 3.658795895660774) internal successors, (29596), 8089 states have internal predecessors, (29596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8090 states to 8090 states and 29596 transitions. [2022-02-15 13:07:47,430 INFO L78 Accepts]: Start accepts. Automaton has 8090 states and 29596 transitions. Word has length 25 [2022-02-15 13:07:47,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:47,430 INFO L470 AbstractCegarLoop]: Abstraction has 8090 states and 29596 transitions. [2022-02-15 13:07:47,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 8090 states and 29596 transitions. [2022-02-15 13:07:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:47,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:47,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:47,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:47,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-15 13:07:47,659 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:47,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1388571988, now seen corresponding path program 30 times [2022-02-15 13:07:47,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:47,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456949700] [2022-02-15 13:07:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:47,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:47,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:47,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456949700] [2022-02-15 13:07:47,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456949700] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:47,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655697443] [2022-02-15 13:07:47,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:47,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:47,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:47,736 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:47,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-15 13:07:47,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:07:47,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:47,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:07:47,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:47,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:48,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655697443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:48,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:48,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-15 13:07:48,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144218859] [2022-02-15 13:07:48,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:48,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:07:48,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:48,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:07:48,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:07:48,029 INFO L87 Difference]: Start difference. First operand 8090 states and 29596 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:49,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:49,977 INFO L93 Difference]: Finished difference Result 12974 states and 43200 transitions. [2022-02-15 13:07:49,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-15 13:07:49,977 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:49,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:50,007 INFO L225 Difference]: With dead ends: 12974 [2022-02-15 13:07:50,008 INFO L226 Difference]: Without dead ends: 12962 [2022-02-15 13:07:50,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5226 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3102, Invalid=9330, Unknown=0, NotChecked=0, Total=12432 [2022-02-15 13:07:50,008 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 627 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:50,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 355 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:07:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12962 states. [2022-02-15 13:07:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12962 to 7898. [2022-02-15 13:07:50,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7898 states, 7897 states have (on average 3.6521463847030518) internal successors, (28841), 7897 states have internal predecessors, (28841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:50,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7898 states to 7898 states and 28841 transitions. [2022-02-15 13:07:50,194 INFO L78 Accepts]: Start accepts. Automaton has 7898 states and 28841 transitions. Word has length 25 [2022-02-15 13:07:50,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:50,194 INFO L470 AbstractCegarLoop]: Abstraction has 7898 states and 28841 transitions. [2022-02-15 13:07:50,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:50,194 INFO L276 IsEmpty]: Start isEmpty. Operand 7898 states and 28841 transitions. [2022-02-15 13:07:50,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:50,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:50,207 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:50,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-02-15 13:07:50,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:50,423 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1214287472, now seen corresponding path program 31 times [2022-02-15 13:07:50,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:50,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740771127] [2022-02-15 13:07:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:50,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:50,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:50,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740771127] [2022-02-15 13:07:50,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740771127] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:50,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723661904] [2022-02-15 13:07:50,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:50,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:50,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:50,471 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:50,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-15 13:07:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:50,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:07:50,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:50,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:50,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:50,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723661904] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:50,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:50,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-02-15 13:07:50,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018952643] [2022-02-15 13:07:50,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:50,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:07:50,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:50,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:07:50,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:07:50,620 INFO L87 Difference]: Start difference. First operand 7898 states and 28841 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:50,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:50,839 INFO L93 Difference]: Finished difference Result 10133 states and 35170 transitions. [2022-02-15 13:07:50,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:07:50,840 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:50,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:50,862 INFO L225 Difference]: With dead ends: 10133 [2022-02-15 13:07:50,862 INFO L226 Difference]: Without dead ends: 10125 [2022-02-15 13:07:50,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-02-15 13:07:50,863 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 129 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:50,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 96 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10125 states. [2022-02-15 13:07:50,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10125 to 7507. [2022-02-15 13:07:50,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7507 states, 7506 states have (on average 3.642685851318945) internal successors, (27342), 7506 states have internal predecessors, (27342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7507 states to 7507 states and 27342 transitions. [2022-02-15 13:07:51,017 INFO L78 Accepts]: Start accepts. Automaton has 7507 states and 27342 transitions. Word has length 25 [2022-02-15 13:07:51,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:51,017 INFO L470 AbstractCegarLoop]: Abstraction has 7507 states and 27342 transitions. [2022-02-15 13:07:51,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:51,017 INFO L276 IsEmpty]: Start isEmpty. Operand 7507 states and 27342 transitions. [2022-02-15 13:07:51,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:51,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:51,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:51,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:51,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:51,239 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:51,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:51,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1146236264, now seen corresponding path program 32 times [2022-02-15 13:07:51,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:51,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344501941] [2022-02-15 13:07:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:51,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:51,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:51,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344501941] [2022-02-15 13:07:51,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344501941] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:51,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602625299] [2022-02-15 13:07:51,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:07:51,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:51,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:51,308 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:51,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-15 13:07:51,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:07:51,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:51,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:07:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:51,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:51,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602625299] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:51,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:51,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-02-15 13:07:51,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310394148] [2022-02-15 13:07:51,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:51,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:51,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:51,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:51,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:51,587 INFO L87 Difference]: Start difference. First operand 7507 states and 27342 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:53,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:53,471 INFO L93 Difference]: Finished difference Result 16117 states and 55172 transitions. [2022-02-15 13:07:53,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-15 13:07:53,471 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:53,510 INFO L225 Difference]: With dead ends: 16117 [2022-02-15 13:07:53,510 INFO L226 Difference]: Without dead ends: 16117 [2022-02-15 13:07:53,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4013 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2608, Invalid=8104, Unknown=0, NotChecked=0, Total=10712 [2022-02-15 13:07:53,512 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 526 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:53,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 277 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:07:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16117 states. [2022-02-15 13:07:53,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16117 to 8358. [2022-02-15 13:07:53,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8358 states, 8357 states have (on average 3.7146105061624985) internal successors, (31043), 8357 states have internal predecessors, (31043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8358 states to 8358 states and 31043 transitions. [2022-02-15 13:07:53,738 INFO L78 Accepts]: Start accepts. Automaton has 8358 states and 31043 transitions. Word has length 25 [2022-02-15 13:07:53,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:53,739 INFO L470 AbstractCegarLoop]: Abstraction has 8358 states and 31043 transitions. [2022-02-15 13:07:53,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:53,739 INFO L276 IsEmpty]: Start isEmpty. Operand 8358 states and 31043 transitions. [2022-02-15 13:07:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:53,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:53,753 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:53,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:53,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-15 13:07:53,967 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:53,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash -2112049308, now seen corresponding path program 33 times [2022-02-15 13:07:53,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:53,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300624202] [2022-02-15 13:07:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:53,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:54,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:54,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300624202] [2022-02-15 13:07:54,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300624202] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:54,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720886769] [2022-02-15 13:07:54,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:07:54,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:54,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:54,006 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:54,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-15 13:07:54,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:07:54,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:54,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:07:54,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:54,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:54,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720886769] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:54,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:54,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-02-15 13:07:54,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63198880] [2022-02-15 13:07:54,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:54,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:07:54,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:54,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:07:54,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:07:54,271 INFO L87 Difference]: Start difference. First operand 8358 states and 31043 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:55,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:55,477 INFO L93 Difference]: Finished difference Result 15503 states and 53080 transitions. [2022-02-15 13:07:55,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 13:07:55,477 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:55,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:55,516 INFO L225 Difference]: With dead ends: 15503 [2022-02-15 13:07:55,516 INFO L226 Difference]: Without dead ends: 15491 [2022-02-15 13:07:55,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1859, Invalid=5113, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 13:07:55,518 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 534 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:55,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [534 Valid, 267 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:07:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15491 states. [2022-02-15 13:07:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15491 to 8184. [2022-02-15 13:07:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8184 states, 8183 states have (on average 3.682756935109373) internal successors, (30136), 8183 states have internal predecessors, (30136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8184 states to 8184 states and 30136 transitions. [2022-02-15 13:07:55,750 INFO L78 Accepts]: Start accepts. Automaton has 8184 states and 30136 transitions. Word has length 25 [2022-02-15 13:07:55,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:55,750 INFO L470 AbstractCegarLoop]: Abstraction has 8184 states and 30136 transitions. [2022-02-15 13:07:55,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 8184 states and 30136 transitions. [2022-02-15 13:07:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:55,764 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:55,764 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:55,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:55,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:55,968 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:55,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1678098526, now seen corresponding path program 34 times [2022-02-15 13:07:55,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:55,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694075593] [2022-02-15 13:07:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:55,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:56,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:56,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694075593] [2022-02-15 13:07:56,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694075593] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:56,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609788003] [2022-02-15 13:07:56,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:07:56,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:56,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:56,032 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:56,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-15 13:07:56,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:07:56,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:56,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:07:56,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:56,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:56,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609788003] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:56,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:56,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-02-15 13:07:56,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637599289] [2022-02-15 13:07:56,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:56,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:07:56,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:56,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:07:56,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:07:56,183 INFO L87 Difference]: Start difference. First operand 8184 states and 30136 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:56,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:56,492 INFO L93 Difference]: Finished difference Result 19877 states and 69697 transitions. [2022-02-15 13:07:56,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:07:56,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:56,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:56,540 INFO L225 Difference]: With dead ends: 19877 [2022-02-15 13:07:56,540 INFO L226 Difference]: Without dead ends: 19877 [2022-02-15 13:07:56,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:07:56,541 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 204 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:56,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 133 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:56,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19877 states. [2022-02-15 13:07:56,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19877 to 12617. [2022-02-15 13:07:56,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12617 states, 12616 states have (on average 3.797717184527584) internal successors, (47912), 12616 states have internal predecessors, (47912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12617 states to 12617 states and 47912 transitions. [2022-02-15 13:07:56,855 INFO L78 Accepts]: Start accepts. Automaton has 12617 states and 47912 transitions. Word has length 25 [2022-02-15 13:07:56,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:56,856 INFO L470 AbstractCegarLoop]: Abstraction has 12617 states and 47912 transitions. [2022-02-15 13:07:56,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 12617 states and 47912 transitions. [2022-02-15 13:07:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:56,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:56,879 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:56,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-02-15 13:07:57,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:57,094 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:57,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:57,095 INFO L85 PathProgramCache]: Analyzing trace with hash -158041622, now seen corresponding path program 35 times [2022-02-15 13:07:57,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:57,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487487329] [2022-02-15 13:07:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:57,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:57,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:57,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487487329] [2022-02-15 13:07:57,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487487329] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:57,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575188055] [2022-02-15 13:07:57,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:07:57,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:57,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:57,138 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:57,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-15 13:07:57,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:07:57,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:57,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:07:57,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:57,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:57,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575188055] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:57,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:57,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-02-15 13:07:57,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79951109] [2022-02-15 13:07:57,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:57,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:07:57,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:57,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:07:57,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:07:57,258 INFO L87 Difference]: Start difference. First operand 12617 states and 47912 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:57,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:57,487 INFO L93 Difference]: Finished difference Result 16989 states and 60544 transitions. [2022-02-15 13:07:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:07:57,488 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:57,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:57,530 INFO L225 Difference]: With dead ends: 16989 [2022-02-15 13:07:57,530 INFO L226 Difference]: Without dead ends: 16975 [2022-02-15 13:07:57,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:07:57,530 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 240 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:57,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 77 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:57,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16975 states. [2022-02-15 13:07:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16975 to 11442. [2022-02-15 13:07:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11442 states, 11441 states have (on average 3.776942574949742) internal successors, (43212), 11441 states have internal predecessors, (43212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:57,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11442 states to 11442 states and 43212 transitions. [2022-02-15 13:07:57,834 INFO L78 Accepts]: Start accepts. Automaton has 11442 states and 43212 transitions. Word has length 25 [2022-02-15 13:07:57,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:57,834 INFO L470 AbstractCegarLoop]: Abstraction has 11442 states and 43212 transitions. [2022-02-15 13:07:57,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:57,835 INFO L276 IsEmpty]: Start isEmpty. Operand 11442 states and 43212 transitions. [2022-02-15 13:07:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:57,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:57,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:57,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:58,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-02-15 13:07:58,069 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:58,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1325093316, now seen corresponding path program 36 times [2022-02-15 13:07:58,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:58,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073547098] [2022-02-15 13:07:58,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:58,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:58,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:58,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073547098] [2022-02-15 13:07:58,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073547098] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:58,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176571732] [2022-02-15 13:07:58,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:07:58,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:58,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:58,140 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:58,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-15 13:07:58,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 13:07:58,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:07:58,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:07:58,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:58,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:58,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176571732] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:58,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:58,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-02-15 13:07:58,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822442909] [2022-02-15 13:07:58,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:58,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:07:58,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:07:58,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:07:58,286 INFO L87 Difference]: Start difference. First operand 11442 states and 43212 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:58,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:07:58,563 INFO L93 Difference]: Finished difference Result 15660 states and 55413 transitions. [2022-02-15 13:07:58,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:07:58,563 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:07:58,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:07:58,601 INFO L225 Difference]: With dead ends: 15660 [2022-02-15 13:07:58,601 INFO L226 Difference]: Without dead ends: 15638 [2022-02-15 13:07:58,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:07:58,601 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 282 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:07:58,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 86 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:07:58,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15638 states. [2022-02-15 13:07:58,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15638 to 11012. [2022-02-15 13:07:58,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11012 states, 11011 states have (on average 3.757606030333303) internal successors, (41375), 11011 states have internal predecessors, (41375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11012 states to 11012 states and 41375 transitions. [2022-02-15 13:07:58,926 INFO L78 Accepts]: Start accepts. Automaton has 11012 states and 41375 transitions. Word has length 25 [2022-02-15 13:07:58,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:07:58,926 INFO L470 AbstractCegarLoop]: Abstraction has 11012 states and 41375 transitions. [2022-02-15 13:07:58,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:07:58,926 INFO L276 IsEmpty]: Start isEmpty. Operand 11012 states and 41375 transitions. [2022-02-15 13:07:58,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:07:58,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:07:58,947 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:07:58,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-15 13:07:59,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:59,160 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:07:59,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:07:59,160 INFO L85 PathProgramCache]: Analyzing trace with hash 347211234, now seen corresponding path program 37 times [2022-02-15 13:07:59,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:07:59,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652664775] [2022-02-15 13:07:59,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:07:59,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:07:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:59,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:59,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:07:59,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652664775] [2022-02-15 13:07:59,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652664775] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:07:59,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489347395] [2022-02-15 13:07:59,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:07:59,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:07:59,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:07:59,201 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:07:59,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-15 13:07:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:07:59,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:07:59,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:07:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:07:59,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:07:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:07:59,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489347395] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:07:59,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:07:59,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-15 13:07:59,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880142982] [2022-02-15 13:07:59,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:07:59,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:07:59,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:07:59,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:07:59,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:07:59,451 INFO L87 Difference]: Start difference. First operand 11012 states and 41375 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:00,845 INFO L93 Difference]: Finished difference Result 15192 states and 53704 transitions. [2022-02-15 13:08:00,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-15 13:08:00,846 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:00,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:00,887 INFO L225 Difference]: With dead ends: 15192 [2022-02-15 13:08:00,887 INFO L226 Difference]: Without dead ends: 15192 [2022-02-15 13:08:00,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3636 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2098, Invalid=7802, Unknown=0, NotChecked=0, Total=9900 [2022-02-15 13:08:00,889 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 373 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:00,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 236 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:08:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15192 states. [2022-02-15 13:08:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15192 to 11138. [2022-02-15 13:08:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11138 states, 11137 states have (on average 3.764658346053695) internal successors, (41927), 11137 states have internal predecessors, (41927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11138 states to 11138 states and 41927 transitions. [2022-02-15 13:08:01,143 INFO L78 Accepts]: Start accepts. Automaton has 11138 states and 41927 transitions. Word has length 25 [2022-02-15 13:08:01,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:01,143 INFO L470 AbstractCegarLoop]: Abstraction has 11138 states and 41927 transitions. [2022-02-15 13:08:01,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 11138 states and 41927 transitions. [2022-02-15 13:08:01,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:01,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:01,207 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:01,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:01,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-02-15 13:08:01,422 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:01,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:01,423 INFO L85 PathProgramCache]: Analyzing trace with hash 220335586, now seen corresponding path program 38 times [2022-02-15 13:08:01,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:01,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524305518] [2022-02-15 13:08:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:01,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:01,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:01,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524305518] [2022-02-15 13:08:01,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524305518] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:01,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361198218] [2022-02-15 13:08:01,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:08:01,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:01,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:01,469 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:01,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-15 13:08:01,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:08:01,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:01,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:08:01,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:01,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:08:01,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361198218] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:01,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:01,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-15 13:08:01,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585417065] [2022-02-15 13:08:01,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:01,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:08:01,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:01,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:08:01,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:08:01,724 INFO L87 Difference]: Start difference. First operand 11138 states and 41927 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-02-15 13:08:02,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:02,445 INFO L93 Difference]: Finished difference Result 13833 states and 49529 transitions. [2022-02-15 13:08:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 13:08:02,446 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 25 [2022-02-15 13:08:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:02,480 INFO L225 Difference]: With dead ends: 13833 [2022-02-15 13:08:02,480 INFO L226 Difference]: Without dead ends: 13812 [2022-02-15 13:08:02,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=858, Invalid=2802, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 13:08:02,482 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 399 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:02,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 233 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:02,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13812 states. [2022-02-15 13:08:02,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13812 to 11138. [2022-02-15 13:08:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11138 states, 11137 states have (on average 3.7639400197539734) internal successors, (41919), 11137 states have internal predecessors, (41919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11138 states to 11138 states and 41919 transitions. [2022-02-15 13:08:02,727 INFO L78 Accepts]: Start accepts. Automaton has 11138 states and 41919 transitions. Word has length 25 [2022-02-15 13:08:02,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:02,727 INFO L470 AbstractCegarLoop]: Abstraction has 11138 states and 41919 transitions. [2022-02-15 13:08:02,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-02-15 13:08:02,727 INFO L276 IsEmpty]: Start isEmpty. Operand 11138 states and 41919 transitions. [2022-02-15 13:08:02,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:02,747 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:02,747 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:02,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-02-15 13:08:02,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-02-15 13:08:02,957 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:02,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1493691874, now seen corresponding path program 39 times [2022-02-15 13:08:02,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:02,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229133976] [2022-02-15 13:08:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:02,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:02,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:02,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229133976] [2022-02-15 13:08:02,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229133976] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:02,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390430139] [2022-02-15 13:08:02,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:08:02,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:02,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:02,999 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:03,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-15 13:08:03,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:08:03,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:03,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:08:03,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:03,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:03,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390430139] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:03,260 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:03,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-15 13:08:03,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392110334] [2022-02-15 13:08:03,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:03,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:08:03,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:03,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:08:03,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:08:03,260 INFO L87 Difference]: Start difference. First operand 11138 states and 41919 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-02-15 13:08:04,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:04,392 INFO L93 Difference]: Finished difference Result 14424 states and 51191 transitions. [2022-02-15 13:08:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:08:04,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 25 [2022-02-15 13:08:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:04,426 INFO L225 Difference]: With dead ends: 14424 [2022-02-15 13:08:04,426 INFO L226 Difference]: Without dead ends: 14396 [2022-02-15 13:08:04,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=887, Invalid=2895, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 13:08:04,426 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 386 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:04,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 233 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:08:04,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14396 states. [2022-02-15 13:08:04,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14396 to 11195. [2022-02-15 13:08:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11195 states, 11194 states have (on average 3.7634447025192066) internal successors, (42128), 11194 states have internal predecessors, (42128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:04,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11195 states to 11195 states and 42128 transitions. [2022-02-15 13:08:04,658 INFO L78 Accepts]: Start accepts. Automaton has 11195 states and 42128 transitions. Word has length 25 [2022-02-15 13:08:04,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:04,658 INFO L470 AbstractCegarLoop]: Abstraction has 11195 states and 42128 transitions. [2022-02-15 13:08:04,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-02-15 13:08:04,658 INFO L276 IsEmpty]: Start isEmpty. Operand 11195 states and 42128 transitions. [2022-02-15 13:08:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:04,677 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:04,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:04,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-02-15 13:08:04,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:04,882 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:04,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:04,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1696680730, now seen corresponding path program 40 times [2022-02-15 13:08:04,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:04,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102671910] [2022-02-15 13:08:04,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:04,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:04,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:04,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102671910] [2022-02-15 13:08:04,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102671910] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:04,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882895304] [2022-02-15 13:08:04,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:08:04,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:04,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:04,944 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:04,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-15 13:08:04,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:08:04,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:04,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:08:04,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:05,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:05,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882895304] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:05,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:05,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-15 13:08:05,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402268738] [2022-02-15 13:08:05,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:05,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:08:05,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:05,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:08:05,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:08:05,132 INFO L87 Difference]: Start difference. First operand 11195 states and 42128 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:06,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:06,427 INFO L93 Difference]: Finished difference Result 14912 states and 52543 transitions. [2022-02-15 13:08:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 13:08:06,428 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:06,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:06,468 INFO L225 Difference]: With dead ends: 14912 [2022-02-15 13:08:06,468 INFO L226 Difference]: Without dead ends: 14900 [2022-02-15 13:08:06,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1308, Invalid=4392, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 13:08:06,469 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 349 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:06,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 331 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:08:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14900 states. [2022-02-15 13:08:06,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14900 to 11138. [2022-02-15 13:08:06,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11138 states, 11137 states have (on average 3.7660949986531382) internal successors, (41943), 11137 states have internal predecessors, (41943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:06,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11138 states to 11138 states and 41943 transitions. [2022-02-15 13:08:06,750 INFO L78 Accepts]: Start accepts. Automaton has 11138 states and 41943 transitions. Word has length 25 [2022-02-15 13:08:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:06,751 INFO L470 AbstractCegarLoop]: Abstraction has 11138 states and 41943 transitions. [2022-02-15 13:08:06,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 11138 states and 41943 transitions. [2022-02-15 13:08:06,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:06,770 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:06,770 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:06,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:06,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:06,977 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:06,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1229977822, now seen corresponding path program 41 times [2022-02-15 13:08:06,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:06,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187863721] [2022-02-15 13:08:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:06,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:07,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:07,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187863721] [2022-02-15 13:08:07,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187863721] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:07,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867852076] [2022-02-15 13:08:07,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:08:07,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:07,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:07,027 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:07,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-15 13:08:07,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:08:07,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:07,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:08:07,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:07,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:07,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867852076] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:07,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:07,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2022-02-15 13:08:07,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897486332] [2022-02-15 13:08:07,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:07,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:08:07,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:07,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:08:07,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:08:07,289 INFO L87 Difference]: Start difference. First operand 11138 states and 41943 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2022-02-15 13:08:08,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:08,102 INFO L93 Difference]: Finished difference Result 14340 states and 51496 transitions. [2022-02-15 13:08:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 13:08:08,102 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 25 [2022-02-15 13:08:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:08,145 INFO L225 Difference]: With dead ends: 14340 [2022-02-15 13:08:08,145 INFO L226 Difference]: Without dead ends: 14277 [2022-02-15 13:08:08,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=683, Invalid=2397, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 13:08:08,146 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 420 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:08,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 203 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:08,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14277 states. [2022-02-15 13:08:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14277 to 11984. [2022-02-15 13:08:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11984 states, 11983 states have (on average 3.751397813569223) internal successors, (44953), 11983 states have internal predecessors, (44953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11984 states to 11984 states and 44953 transitions. [2022-02-15 13:08:08,416 INFO L78 Accepts]: Start accepts. Automaton has 11984 states and 44953 transitions. Word has length 25 [2022-02-15 13:08:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:08,416 INFO L470 AbstractCegarLoop]: Abstraction has 11984 states and 44953 transitions. [2022-02-15 13:08:08,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2022-02-15 13:08:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 11984 states and 44953 transitions. [2022-02-15 13:08:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:08,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:08,437 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:08,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:08,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-02-15 13:08:08,652 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:08,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:08,653 INFO L85 PathProgramCache]: Analyzing trace with hash 73924450, now seen corresponding path program 42 times [2022-02-15 13:08:08,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:08,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622587366] [2022-02-15 13:08:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:08,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:08,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:08,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622587366] [2022-02-15 13:08:08,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622587366] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:08,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36061539] [2022-02-15 13:08:08,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:08:08,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:08,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:08,704 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:08,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-15 13:08:08,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:08:08,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:08,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:08:08,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:08,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:08,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36061539] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:08,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:08,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-15 13:08:08,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917862605] [2022-02-15 13:08:08,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:08,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:08:08,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:08,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:08:08,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:08:08,995 INFO L87 Difference]: Start difference. First operand 11984 states and 44953 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-02-15 13:08:09,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:09,872 INFO L93 Difference]: Finished difference Result 15051 states and 53533 transitions. [2022-02-15 13:08:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:08:09,872 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 25 [2022-02-15 13:08:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:09,912 INFO L225 Difference]: With dead ends: 15051 [2022-02-15 13:08:09,912 INFO L226 Difference]: Without dead ends: 15037 [2022-02-15 13:08:09,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 13:08:09,913 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 365 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:09,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 206 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:09,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15037 states. [2022-02-15 13:08:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15037 to 12440. [2022-02-15 13:08:10,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12440 states, 12439 states have (on average 3.7323739850470297) internal successors, (46427), 12439 states have internal predecessors, (46427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:10,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12440 states to 12440 states and 46427 transitions. [2022-02-15 13:08:10,207 INFO L78 Accepts]: Start accepts. Automaton has 12440 states and 46427 transitions. Word has length 25 [2022-02-15 13:08:10,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:10,207 INFO L470 AbstractCegarLoop]: Abstraction has 12440 states and 46427 transitions. [2022-02-15 13:08:10,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-02-15 13:08:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 12440 states and 46427 transitions. [2022-02-15 13:08:10,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:10,231 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:10,231 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:10,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-02-15 13:08:10,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-02-15 13:08:10,440 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:10,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:10,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1178519142, now seen corresponding path program 43 times [2022-02-15 13:08:10,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:10,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508865409] [2022-02-15 13:08:10,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:10,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:10,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:10,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508865409] [2022-02-15 13:08:10,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508865409] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:10,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086183106] [2022-02-15 13:08:10,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:08:10,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:10,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:10,494 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:10,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-15 13:08:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:10,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:08:10,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:10,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:10,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:10,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086183106] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:10,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:10,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 14 [2022-02-15 13:08:10,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362904840] [2022-02-15 13:08:10,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:10,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:08:10,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:10,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:08:10,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:08:10,712 INFO L87 Difference]: Start difference. First operand 12440 states and 46427 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:11,839 INFO L93 Difference]: Finished difference Result 15646 states and 55056 transitions. [2022-02-15 13:08:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 13:08:11,839 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:11,874 INFO L225 Difference]: With dead ends: 15646 [2022-02-15 13:08:11,875 INFO L226 Difference]: Without dead ends: 15634 [2022-02-15 13:08:11,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=971, Invalid=3061, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:08:11,875 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 352 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:11,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 260 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:08:11,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15634 states. [2022-02-15 13:08:12,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15634 to 12392. [2022-02-15 13:08:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12392 states, 12391 states have (on average 3.7316600758615124) internal successors, (46239), 12391 states have internal predecessors, (46239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12392 states to 12392 states and 46239 transitions. [2022-02-15 13:08:12,185 INFO L78 Accepts]: Start accepts. Automaton has 12392 states and 46239 transitions. Word has length 25 [2022-02-15 13:08:12,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:12,185 INFO L470 AbstractCegarLoop]: Abstraction has 12392 states and 46239 transitions. [2022-02-15 13:08:12,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:12,186 INFO L276 IsEmpty]: Start isEmpty. Operand 12392 states and 46239 transitions. [2022-02-15 13:08:12,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:12,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:12,210 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:12,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:12,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:12,426 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:12,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:12,426 INFO L85 PathProgramCache]: Analyzing trace with hash 786211702, now seen corresponding path program 17 times [2022-02-15 13:08:12,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:12,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24486035] [2022-02-15 13:08:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:12,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:12,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:12,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24486035] [2022-02-15 13:08:12,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24486035] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:12,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394769630] [2022-02-15 13:08:12,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:08:12,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:12,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:12,470 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:12,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-15 13:08:12,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:08:12,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:12,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:08:12,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:12,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:12,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:12,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394769630] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:12,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:12,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-15 13:08:12,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146263181] [2022-02-15 13:08:12,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:12,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:08:12,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:12,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:08:12,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:08:12,654 INFO L87 Difference]: Start difference. First operand 12392 states and 46239 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:13,500 INFO L93 Difference]: Finished difference Result 15611 states and 55117 transitions. [2022-02-15 13:08:13,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 13:08:13,500 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:13,539 INFO L225 Difference]: With dead ends: 15611 [2022-02-15 13:08:13,539 INFO L226 Difference]: Without dead ends: 15611 [2022-02-15 13:08:13,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1262, Invalid=3708, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 13:08:13,540 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 378 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:13,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 263 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:08:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15611 states. [2022-02-15 13:08:13,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15611 to 12615. [2022-02-15 13:08:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12615 states, 12614 states have (on average 3.7307753289995245) internal successors, (47060), 12614 states have internal predecessors, (47060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12615 states to 12615 states and 47060 transitions. [2022-02-15 13:08:13,815 INFO L78 Accepts]: Start accepts. Automaton has 12615 states and 47060 transitions. Word has length 25 [2022-02-15 13:08:13,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:13,815 INFO L470 AbstractCegarLoop]: Abstraction has 12615 states and 47060 transitions. [2022-02-15 13:08:13,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 12615 states and 47060 transitions. [2022-02-15 13:08:13,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:13,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:13,839 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:13,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:14,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:14,052 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:14,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1098899790, now seen corresponding path program 18 times [2022-02-15 13:08:14,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:14,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448563324] [2022-02-15 13:08:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:14,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:14,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:14,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448563324] [2022-02-15 13:08:14,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448563324] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:14,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775343302] [2022-02-15 13:08:14,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:08:14,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:14,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:14,090 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:14,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-15 13:08:14,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:08:14,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:14,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:08:14,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:14,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:14,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775343302] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:14,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:14,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-15 13:08:14,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651752907] [2022-02-15 13:08:14,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:14,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:08:14,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:14,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:08:14,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:08:14,255 INFO L87 Difference]: Start difference. First operand 12615 states and 47060 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2022-02-15 13:08:15,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:15,416 INFO L93 Difference]: Finished difference Result 38637 states and 135899 transitions. [2022-02-15 13:08:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 13:08:15,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 25 [2022-02-15 13:08:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:15,541 INFO L225 Difference]: With dead ends: 38637 [2022-02-15 13:08:15,541 INFO L226 Difference]: Without dead ends: 38575 [2022-02-15 13:08:15,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1053, Invalid=3503, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:08:15,542 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 498 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:15,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 249 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:15,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38575 states. [2022-02-15 13:08:16,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38575 to 15744. [2022-02-15 13:08:16,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15744 states, 15743 states have (on average 3.8201740456075717) internal successors, (60141), 15743 states have internal predecessors, (60141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:16,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15744 states to 15744 states and 60141 transitions. [2022-02-15 13:08:16,123 INFO L78 Accepts]: Start accepts. Automaton has 15744 states and 60141 transitions. Word has length 25 [2022-02-15 13:08:16,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:16,123 INFO L470 AbstractCegarLoop]: Abstraction has 15744 states and 60141 transitions. [2022-02-15 13:08:16,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2022-02-15 13:08:16,123 INFO L276 IsEmpty]: Start isEmpty. Operand 15744 states and 60141 transitions. [2022-02-15 13:08:16,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:16,154 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:16,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:16,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:16,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-02-15 13:08:16,370 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:16,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:16,370 INFO L85 PathProgramCache]: Analyzing trace with hash 801359794, now seen corresponding path program 19 times [2022-02-15 13:08:16,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:16,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749417527] [2022-02-15 13:08:16,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:16,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:16,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:16,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749417527] [2022-02-15 13:08:16,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749417527] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:16,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540340301] [2022-02-15 13:08:16,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:08:16,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:16,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:16,408 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:16,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-15 13:08:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:16,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:08:16,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:16,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:16,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540340301] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:16,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:16,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-15 13:08:16,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349705036] [2022-02-15 13:08:16,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:16,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:08:16,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:16,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:08:16,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:08:16,566 INFO L87 Difference]: Start difference. First operand 15744 states and 60141 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:17,580 INFO L93 Difference]: Finished difference Result 48113 states and 167521 transitions. [2022-02-15 13:08:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 13:08:17,580 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:17,737 INFO L225 Difference]: With dead ends: 48113 [2022-02-15 13:08:17,737 INFO L226 Difference]: Without dead ends: 48057 [2022-02-15 13:08:17,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=867, Invalid=2673, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 13:08:17,738 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 365 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:17,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 357 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48057 states. [2022-02-15 13:08:18,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48057 to 16563. [2022-02-15 13:08:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16563 states, 16562 states have (on average 3.779193334138389) internal successors, (62591), 16562 states have internal predecessors, (62591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16563 states to 16563 states and 62591 transitions. [2022-02-15 13:08:18,596 INFO L78 Accepts]: Start accepts. Automaton has 16563 states and 62591 transitions. Word has length 25 [2022-02-15 13:08:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:18,596 INFO L470 AbstractCegarLoop]: Abstraction has 16563 states and 62591 transitions. [2022-02-15 13:08:18,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 16563 states and 62591 transitions. [2022-02-15 13:08:18,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:18,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:18,625 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:18,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-02-15 13:08:18,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:18,839 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:18,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:18,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1107594414, now seen corresponding path program 20 times [2022-02-15 13:08:18,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:18,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307931536] [2022-02-15 13:08:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:18,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:18,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:18,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307931536] [2022-02-15 13:08:18,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307931536] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:18,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522580364] [2022-02-15 13:08:18,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:08:18,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:18,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:18,879 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:18,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-15 13:08:18,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:08:18,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:18,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:08:18,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:19,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:19,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522580364] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:19,128 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:19,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2022-02-15 13:08:19,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897466398] [2022-02-15 13:08:19,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:19,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:08:19,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:19,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:08:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:08:19,128 INFO L87 Difference]: Start difference. First operand 16563 states and 62591 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2022-02-15 13:08:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:20,145 INFO L93 Difference]: Finished difference Result 19098 states and 69360 transitions. [2022-02-15 13:08:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 13:08:20,145 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 25 [2022-02-15 13:08:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:20,195 INFO L225 Difference]: With dead ends: 19098 [2022-02-15 13:08:20,195 INFO L226 Difference]: Without dead ends: 19063 [2022-02-15 13:08:20,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=951, Invalid=3081, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 13:08:20,196 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 374 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:20,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 221 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:20,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19063 states. [2022-02-15 13:08:20,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19063 to 16487. [2022-02-15 13:08:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16487 states, 16486 states have (on average 3.782057503336164) internal successors, (62351), 16486 states have internal predecessors, (62351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:20,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16487 states to 16487 states and 62351 transitions. [2022-02-15 13:08:20,603 INFO L78 Accepts]: Start accepts. Automaton has 16487 states and 62351 transitions. Word has length 25 [2022-02-15 13:08:20,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:20,603 INFO L470 AbstractCegarLoop]: Abstraction has 16487 states and 62351 transitions. [2022-02-15 13:08:20,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2022-02-15 13:08:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 16487 states and 62351 transitions. [2022-02-15 13:08:20,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:20,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:20,750 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:20,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-02-15 13:08:20,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:20,951 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:20,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:20,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1643761502, now seen corresponding path program 21 times [2022-02-15 13:08:20,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:20,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345078942] [2022-02-15 13:08:20,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:20,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:08:20,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:20,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345078942] [2022-02-15 13:08:20,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345078942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:20,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856075500] [2022-02-15 13:08:20,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:08:20,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:20,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:20,990 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:20,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-15 13:08:21,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:08:21,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:21,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:08:21,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:21,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:08:21,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856075500] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:21,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:21,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2022-02-15 13:08:21,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940461017] [2022-02-15 13:08:21,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:21,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:08:21,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:21,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:08:21,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:08:21,253 INFO L87 Difference]: Start difference. First operand 16487 states and 62351 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2022-02-15 13:08:22,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:22,022 INFO L93 Difference]: Finished difference Result 19001 states and 69178 transitions. [2022-02-15 13:08:22,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 13:08:22,022 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 25 [2022-02-15 13:08:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:22,074 INFO L225 Difference]: With dead ends: 19001 [2022-02-15 13:08:22,074 INFO L226 Difference]: Without dead ends: 18959 [2022-02-15 13:08:22,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 13:08:22,076 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 299 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:22,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 279 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18959 states. [2022-02-15 13:08:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18959 to 16471. [2022-02-15 13:08:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16471 states, 16470 states have (on average 3.7820886460230723) internal successors, (62291), 16470 states have internal predecessors, (62291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16471 states to 16471 states and 62291 transitions. [2022-02-15 13:08:22,490 INFO L78 Accepts]: Start accepts. Automaton has 16471 states and 62291 transitions. Word has length 25 [2022-02-15 13:08:22,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:22,490 INFO L470 AbstractCegarLoop]: Abstraction has 16471 states and 62291 transitions. [2022-02-15 13:08:22,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2022-02-15 13:08:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 16471 states and 62291 transitions. [2022-02-15 13:08:22,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:22,523 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:22,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:22,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:22,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:22,738 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:22,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:22,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1360200822, now seen corresponding path program 22 times [2022-02-15 13:08:22,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:22,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149911092] [2022-02-15 13:08:22,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:22,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:22,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:22,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149911092] [2022-02-15 13:08:22,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149911092] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:22,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50369069] [2022-02-15 13:08:22,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:08:22,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:22,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:22,770 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:22,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-15 13:08:22,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:08:22,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:22,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:08:22,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:22,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:22,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50369069] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:22,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:22,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-15 13:08:22,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917812583] [2022-02-15 13:08:22,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:22,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:08:22,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:22,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:08:22,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:08:22,925 INFO L87 Difference]: Start difference. First operand 16471 states and 62291 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:23,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:23,868 INFO L93 Difference]: Finished difference Result 28929 states and 102768 transitions. [2022-02-15 13:08:23,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 13:08:23,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:23,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:23,960 INFO L225 Difference]: With dead ends: 28929 [2022-02-15 13:08:23,960 INFO L226 Difference]: Without dead ends: 28845 [2022-02-15 13:08:23,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=523, Invalid=1927, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 13:08:23,961 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 272 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:23,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 187 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:23,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28845 states. [2022-02-15 13:08:24,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28845 to 16976. [2022-02-15 13:08:24,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16976 states, 16975 states have (on average 3.786215022091311) internal successors, (64271), 16975 states have internal predecessors, (64271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16976 states to 16976 states and 64271 transitions. [2022-02-15 13:08:24,447 INFO L78 Accepts]: Start accepts. Automaton has 16976 states and 64271 transitions. Word has length 25 [2022-02-15 13:08:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:24,447 INFO L470 AbstractCegarLoop]: Abstraction has 16976 states and 64271 transitions. [2022-02-15 13:08:24,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:24,447 INFO L276 IsEmpty]: Start isEmpty. Operand 16976 states and 64271 transitions. [2022-02-15 13:08:24,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:24,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:24,478 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:24,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:24,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-02-15 13:08:24,691 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:24,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:24,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1101811746, now seen corresponding path program 23 times [2022-02-15 13:08:24,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:24,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642806241] [2022-02-15 13:08:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:24,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:24,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:24,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642806241] [2022-02-15 13:08:24,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642806241] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:24,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398748058] [2022-02-15 13:08:24,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:08:24,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:24,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:24,760 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:24,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-15 13:08:24,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:08:24,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:24,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:08:24,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:24,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:25,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398748058] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:25,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:25,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-02-15 13:08:25,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581966412] [2022-02-15 13:08:25,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:25,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:08:25,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:25,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:08:25,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:08:25,018 INFO L87 Difference]: Start difference. First operand 16976 states and 64271 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:26,094 INFO L93 Difference]: Finished difference Result 20172 states and 73083 transitions. [2022-02-15 13:08:26,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 13:08:26,094 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:26,147 INFO L225 Difference]: With dead ends: 20172 [2022-02-15 13:08:26,147 INFO L226 Difference]: Without dead ends: 20094 [2022-02-15 13:08:26,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=925, Invalid=3631, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:08:26,147 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 301 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:26,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 412 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 947 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:26,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20094 states. [2022-02-15 13:08:26,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20094 to 17422. [2022-02-15 13:08:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17422 states, 17421 states have (on average 3.769818035704035) internal successors, (65674), 17421 states have internal predecessors, (65674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:26,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17422 states to 17422 states and 65674 transitions. [2022-02-15 13:08:26,547 INFO L78 Accepts]: Start accepts. Automaton has 17422 states and 65674 transitions. Word has length 25 [2022-02-15 13:08:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:26,547 INFO L470 AbstractCegarLoop]: Abstraction has 17422 states and 65674 transitions. [2022-02-15 13:08:26,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:26,547 INFO L276 IsEmpty]: Start isEmpty. Operand 17422 states and 65674 transitions. [2022-02-15 13:08:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:26,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:26,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:26,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:26,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-02-15 13:08:26,796 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:26,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:26,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1500037906, now seen corresponding path program 24 times [2022-02-15 13:08:26,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:26,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692798297] [2022-02-15 13:08:26,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:26,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:26,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:26,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692798297] [2022-02-15 13:08:26,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692798297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:26,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417439003] [2022-02-15 13:08:26,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:08:26,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:26,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:26,837 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:26,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-15 13:08:26,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:08:26,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:26,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:08:26,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:27,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:27,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417439003] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:27,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:27,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-15 13:08:27,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577903773] [2022-02-15 13:08:27,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:27,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:08:27,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:27,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:08:27,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:08:27,058 INFO L87 Difference]: Start difference. First operand 17422 states and 65674 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:28,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:28,008 INFO L93 Difference]: Finished difference Result 34778 states and 124552 transitions. [2022-02-15 13:08:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 13:08:28,008 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:28,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:28,110 INFO L225 Difference]: With dead ends: 34778 [2022-02-15 13:08:28,111 INFO L226 Difference]: Without dead ends: 34701 [2022-02-15 13:08:28,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:08:28,111 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 250 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:28,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 256 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:08:28,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34701 states. [2022-02-15 13:08:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34701 to 17827. [2022-02-15 13:08:28,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17827 states, 17826 states have (on average 3.773869628632335) internal successors, (67273), 17826 states have internal predecessors, (67273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:28,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17827 states to 17827 states and 67273 transitions. [2022-02-15 13:08:28,716 INFO L78 Accepts]: Start accepts. Automaton has 17827 states and 67273 transitions. Word has length 25 [2022-02-15 13:08:28,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:28,716 INFO L470 AbstractCegarLoop]: Abstraction has 17827 states and 67273 transitions. [2022-02-15 13:08:28,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 17827 states and 67273 transitions. [2022-02-15 13:08:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:28,750 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:28,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:28,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:28,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-02-15 13:08:28,951 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:28,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:28,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1114485558, now seen corresponding path program 25 times [2022-02-15 13:08:28,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:28,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685402810] [2022-02-15 13:08:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:28,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:28,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:28,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685402810] [2022-02-15 13:08:28,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685402810] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:28,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090959908] [2022-02-15 13:08:28,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:08:28,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:28,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:28,988 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:28,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-15 13:08:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:29,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:08:29,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:29,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:29,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090959908] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:29,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:29,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-15 13:08:29,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337550685] [2022-02-15 13:08:29,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:29,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:08:29,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:29,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:08:29,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:08:29,210 INFO L87 Difference]: Start difference. First operand 17827 states and 67273 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:30,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:30,680 INFO L93 Difference]: Finished difference Result 35331 states and 124349 transitions. [2022-02-15 13:08:30,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 13:08:30,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:30,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:30,778 INFO L225 Difference]: With dead ends: 35331 [2022-02-15 13:08:30,779 INFO L226 Difference]: Without dead ends: 35205 [2022-02-15 13:08:30,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1474, Invalid=5006, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 13:08:30,780 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 317 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1371 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:30,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 439 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1371 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:08:30,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35205 states. [2022-02-15 13:08:31,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35205 to 18164. [2022-02-15 13:08:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18164 states, 18163 states have (on average 3.7771843858393437) internal successors, (68605), 18163 states have internal predecessors, (68605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18164 states to 18164 states and 68605 transitions. [2022-02-15 13:08:31,389 INFO L78 Accepts]: Start accepts. Automaton has 18164 states and 68605 transitions. Word has length 25 [2022-02-15 13:08:31,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:31,389 INFO L470 AbstractCegarLoop]: Abstraction has 18164 states and 68605 transitions. [2022-02-15 13:08:31,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 18164 states and 68605 transitions. [2022-02-15 13:08:31,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:31,425 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:31,425 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:31,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:31,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-02-15 13:08:31,640 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:31,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:31,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1979778250, now seen corresponding path program 26 times [2022-02-15 13:08:31,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:31,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116520615] [2022-02-15 13:08:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:31,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:31,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:31,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116520615] [2022-02-15 13:08:31,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116520615] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:31,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699349036] [2022-02-15 13:08:31,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:08:31,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:31,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:31,676 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:31,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-15 13:08:31,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:08:31,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:31,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:08:31,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:31,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:31,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699349036] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:31,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:31,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-15 13:08:31,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187676929] [2022-02-15 13:08:31,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:31,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:08:31,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:31,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:08:31,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:08:31,843 INFO L87 Difference]: Start difference. First operand 18164 states and 68605 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:33,051 INFO L93 Difference]: Finished difference Result 38580 states and 136606 transitions. [2022-02-15 13:08:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 13:08:33,052 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:33,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:33,385 INFO L225 Difference]: With dead ends: 38580 [2022-02-15 13:08:33,385 INFO L226 Difference]: Without dead ends: 38566 [2022-02-15 13:08:33,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1329, Invalid=4073, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 13:08:33,385 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 390 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:33,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 439 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:08:33,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38566 states. [2022-02-15 13:08:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38566 to 21322. [2022-02-15 13:08:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21322 states, 21321 states have (on average 3.8229445147976175) internal successors, (81509), 21321 states have internal predecessors, (81509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21322 states to 21322 states and 81509 transitions. [2022-02-15 13:08:34,185 INFO L78 Accepts]: Start accepts. Automaton has 21322 states and 81509 transitions. Word has length 25 [2022-02-15 13:08:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:34,185 INFO L470 AbstractCegarLoop]: Abstraction has 21322 states and 81509 transitions. [2022-02-15 13:08:34,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand 21322 states and 81509 transitions. [2022-02-15 13:08:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:34,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:34,230 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:34,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:34,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:34,445 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:34,446 INFO L85 PathProgramCache]: Analyzing trace with hash 807588790, now seen corresponding path program 27 times [2022-02-15 13:08:34,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:34,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151757050] [2022-02-15 13:08:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:34,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:34,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:34,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151757050] [2022-02-15 13:08:34,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151757050] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:34,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10700081] [2022-02-15 13:08:34,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:08:34,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:34,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:34,481 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:34,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-15 13:08:34,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:08:34,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:34,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:08:34,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:34,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:34,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10700081] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:34,691 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:34,691 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2022-02-15 13:08:34,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687014192] [2022-02-15 13:08:34,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:34,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:08:34,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:34,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:08:34,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:08:34,696 INFO L87 Difference]: Start difference. First operand 21322 states and 81509 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:35,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:35,736 INFO L93 Difference]: Finished difference Result 24183 states and 89452 transitions. [2022-02-15 13:08:35,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 13:08:35,736 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:35,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:35,809 INFO L225 Difference]: With dead ends: 24183 [2022-02-15 13:08:35,809 INFO L226 Difference]: Without dead ends: 24175 [2022-02-15 13:08:35,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=859, Invalid=2681, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 13:08:35,810 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 292 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:35,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 259 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:08:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24175 states. [2022-02-15 13:08:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24175 to 21580. [2022-02-15 13:08:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21580 states, 21579 states have (on average 3.812780944436721) internal successors, (82276), 21579 states have internal predecessors, (82276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21580 states to 21580 states and 82276 transitions. [2022-02-15 13:08:36,359 INFO L78 Accepts]: Start accepts. Automaton has 21580 states and 82276 transitions. Word has length 25 [2022-02-15 13:08:36,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:36,359 INFO L470 AbstractCegarLoop]: Abstraction has 21580 states and 82276 transitions. [2022-02-15 13:08:36,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 21580 states and 82276 transitions. [2022-02-15 13:08:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:36,398 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:36,398 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:36,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-02-15 13:08:36,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:36,607 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:36,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:36,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1255847150, now seen corresponding path program 28 times [2022-02-15 13:08:36,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:36,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616872879] [2022-02-15 13:08:36,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:36,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:36,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:36,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616872879] [2022-02-15 13:08:36,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616872879] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:36,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586916408] [2022-02-15 13:08:36,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:08:36,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:36,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:36,654 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:36,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-15 13:08:36,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:08:36,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:36,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:08:36,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:36,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:36,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586916408] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:36,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:36,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2022-02-15 13:08:36,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190180955] [2022-02-15 13:08:36,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:36,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:08:36,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:36,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:08:36,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:08:36,893 INFO L87 Difference]: Start difference. First operand 21580 states and 82276 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:38,421 INFO L93 Difference]: Finished difference Result 25283 states and 92457 transitions. [2022-02-15 13:08:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-15 13:08:38,422 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:38,495 INFO L225 Difference]: With dead ends: 25283 [2022-02-15 13:08:38,495 INFO L226 Difference]: Without dead ends: 25275 [2022-02-15 13:08:38,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1403, Invalid=4917, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 13:08:38,496 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 393 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:38,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 251 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:08:38,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25275 states. [2022-02-15 13:08:39,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25275 to 21934. [2022-02-15 13:08:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21934 states, 21933 states have (on average 3.803902794875302) internal successors, (83431), 21933 states have internal predecessors, (83431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21934 states to 21934 states and 83431 transitions. [2022-02-15 13:08:39,117 INFO L78 Accepts]: Start accepts. Automaton has 21934 states and 83431 transitions. Word has length 25 [2022-02-15 13:08:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:39,117 INFO L470 AbstractCegarLoop]: Abstraction has 21934 states and 83431 transitions. [2022-02-15 13:08:39,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 21934 states and 83431 transitions. [2022-02-15 13:08:39,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:39,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:39,159 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:39,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:39,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:39,368 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:39,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:39,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1128971502, now seen corresponding path program 29 times [2022-02-15 13:08:39,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:39,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692900317] [2022-02-15 13:08:39,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:39,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:39,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:39,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692900317] [2022-02-15 13:08:39,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692900317] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:39,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666407191] [2022-02-15 13:08:39,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:08:39,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:39,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:39,411 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:39,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-15 13:08:39,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:08:39,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:39,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:08:39,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:39,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:39,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666407191] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:39,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:39,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 15 [2022-02-15 13:08:39,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555763245] [2022-02-15 13:08:39,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:39,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:08:39,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:39,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:08:39,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:08:39,655 INFO L87 Difference]: Start difference. First operand 21934 states and 83431 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2022-02-15 13:08:40,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:40,707 INFO L93 Difference]: Finished difference Result 24656 states and 90778 transitions. [2022-02-15 13:08:40,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 13:08:40,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 25 [2022-02-15 13:08:40,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:40,790 INFO L225 Difference]: With dead ends: 24656 [2022-02-15 13:08:40,790 INFO L226 Difference]: Without dead ends: 24628 [2022-02-15 13:08:40,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=824, Invalid=2958, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 13:08:40,790 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 415 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:40,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 223 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:40,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24628 states. [2022-02-15 13:08:41,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24628 to 21762. [2022-02-15 13:08:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21762 states, 21761 states have (on average 3.806580579936584) internal successors, (82835), 21761 states have internal predecessors, (82835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21762 states to 21762 states and 82835 transitions. [2022-02-15 13:08:41,380 INFO L78 Accepts]: Start accepts. Automaton has 21762 states and 82835 transitions. Word has length 25 [2022-02-15 13:08:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:41,380 INFO L470 AbstractCegarLoop]: Abstraction has 21762 states and 82835 transitions. [2022-02-15 13:08:41,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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) [2022-02-15 13:08:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 21762 states and 82835 transitions. [2022-02-15 13:08:41,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:41,422 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:41,422 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:41,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-02-15 13:08:41,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:41,624 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:41,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:41,625 INFO L85 PathProgramCache]: Analyzing trace with hash -251363790, now seen corresponding path program 30 times [2022-02-15 13:08:41,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:41,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472820412] [2022-02-15 13:08:41,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:41,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:41,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:41,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472820412] [2022-02-15 13:08:41,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472820412] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:41,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603828958] [2022-02-15 13:08:41,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:08:41,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:41,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:41,664 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:41,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-15 13:08:41,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:08:41,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:41,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:08:41,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:41,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:41,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603828958] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:41,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:41,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-15 13:08:41,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377817660] [2022-02-15 13:08:41,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:41,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:08:41,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:41,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:08:41,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:08:41,905 INFO L87 Difference]: Start difference. First operand 21762 states and 82835 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:43,230 INFO L93 Difference]: Finished difference Result 31351 states and 113770 transitions. [2022-02-15 13:08:43,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 13:08:43,230 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:43,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:43,330 INFO L225 Difference]: With dead ends: 31351 [2022-02-15 13:08:43,330 INFO L226 Difference]: Without dead ends: 31343 [2022-02-15 13:08:43,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2370 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1734, Invalid=5406, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 13:08:43,330 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 377 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:43,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 277 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:08:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31343 states. [2022-02-15 13:08:43,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31343 to 21682. [2022-02-15 13:08:43,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21682 states, 21681 states have (on average 3.808726534753932) internal successors, (82577), 21681 states have internal predecessors, (82577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:44,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21682 states to 21682 states and 82577 transitions. [2022-02-15 13:08:44,049 INFO L78 Accepts]: Start accepts. Automaton has 21682 states and 82577 transitions. Word has length 25 [2022-02-15 13:08:44,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:44,049 INFO L470 AbstractCegarLoop]: Abstraction has 21682 states and 82577 transitions. [2022-02-15 13:08:44,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:44,050 INFO L276 IsEmpty]: Start isEmpty. Operand 21682 states and 82577 transitions. [2022-02-15 13:08:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:44,096 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:44,096 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:44,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-02-15 13:08:44,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:44,309 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:44,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:44,309 INFO L85 PathProgramCache]: Analyzing trace with hash 195247086, now seen corresponding path program 31 times [2022-02-15 13:08:44,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:44,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876966161] [2022-02-15 13:08:44,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:44,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:44,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:44,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876966161] [2022-02-15 13:08:44,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876966161] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:44,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464067960] [2022-02-15 13:08:44,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:08:44,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:44,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:44,359 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:44,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:08:44,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:44,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-15 13:08:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:44,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:44,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464067960] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:44,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:44,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-02-15 13:08:44,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727785886] [2022-02-15 13:08:44,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:44,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:08:44,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:44,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:08:44,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:08:44,582 INFO L87 Difference]: Start difference. First operand 21682 states and 82577 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:45,847 INFO L93 Difference]: Finished difference Result 32460 states and 116584 transitions. [2022-02-15 13:08:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:08:45,847 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:45,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:45,953 INFO L225 Difference]: With dead ends: 32460 [2022-02-15 13:08:45,954 INFO L226 Difference]: Without dead ends: 32406 [2022-02-15 13:08:45,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=966, Invalid=3456, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 13:08:45,954 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 366 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:45,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 243 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:08:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32406 states. [2022-02-15 13:08:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32406 to 17305. [2022-02-15 13:08:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17305 states, 17304 states have (on average 3.7786061026352287) internal successors, (65385), 17304 states have internal predecessors, (65385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17305 states to 17305 states and 65385 transitions. [2022-02-15 13:08:46,546 INFO L78 Accepts]: Start accepts. Automaton has 17305 states and 65385 transitions. Word has length 25 [2022-02-15 13:08:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:46,546 INFO L470 AbstractCegarLoop]: Abstraction has 17305 states and 65385 transitions. [2022-02-15 13:08:46,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:46,546 INFO L276 IsEmpty]: Start isEmpty. Operand 17305 states and 65385 transitions. [2022-02-15 13:08:46,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:46,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:46,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:46,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:46,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-02-15 13:08:46,792 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:46,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:46,793 INFO L85 PathProgramCache]: Analyzing trace with hash -330182600, now seen corresponding path program 32 times [2022-02-15 13:08:46,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:46,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076439895] [2022-02-15 13:08:46,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:46,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:46,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:46,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076439895] [2022-02-15 13:08:46,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076439895] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:46,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457454735] [2022-02-15 13:08:46,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:08:46,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:46,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:46,833 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:46,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-15 13:08:46,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:08:46,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:46,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:08:46,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:47,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:08:47,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457454735] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:47,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:47,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-15 13:08:47,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207768300] [2022-02-15 13:08:47,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:47,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:08:47,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:47,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:08:47,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:08:47,053 INFO L87 Difference]: Start difference. First operand 17305 states and 65385 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:48,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:48,592 INFO L93 Difference]: Finished difference Result 36778 states and 129120 transitions. [2022-02-15 13:08:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 13:08:48,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:48,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:48,705 INFO L225 Difference]: With dead ends: 36778 [2022-02-15 13:08:48,705 INFO L226 Difference]: Without dead ends: 36631 [2022-02-15 13:08:48,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1592, Invalid=5214, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 13:08:48,706 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 299 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:48,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 347 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:08:48,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36631 states. [2022-02-15 13:08:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36631 to 18807. [2022-02-15 13:08:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18807 states, 18806 states have (on average 3.787089226842497) internal successors, (71220), 18806 states have internal predecessors, (71220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18807 states to 18807 states and 71220 transitions. [2022-02-15 13:08:49,464 INFO L78 Accepts]: Start accepts. Automaton has 18807 states and 71220 transitions. Word has length 25 [2022-02-15 13:08:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:49,464 INFO L470 AbstractCegarLoop]: Abstraction has 18807 states and 71220 transitions. [2022-02-15 13:08:49,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:49,465 INFO L276 IsEmpty]: Start isEmpty. Operand 18807 states and 71220 transitions. [2022-02-15 13:08:49,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:49,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:49,504 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:49,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-02-15 13:08:49,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-02-15 13:08:49,719 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:49,719 INFO L85 PathProgramCache]: Analyzing trace with hash -661165984, now seen corresponding path program 33 times [2022-02-15 13:08:49,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:49,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696256162] [2022-02-15 13:08:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:49,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:49,779 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:49,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696256162] [2022-02-15 13:08:49,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696256162] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:49,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896891177] [2022-02-15 13:08:49,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:08:49,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:49,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:49,780 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:49,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-15 13:08:49,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:08:49,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:49,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:08:49,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:49,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:50,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896891177] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:50,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:50,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-15 13:08:50,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62024049] [2022-02-15 13:08:50,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:50,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:08:50,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:50,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:08:50,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:08:50,040 INFO L87 Difference]: Start difference. First operand 18807 states and 71220 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:51,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:51,588 INFO L93 Difference]: Finished difference Result 38461 states and 136607 transitions. [2022-02-15 13:08:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-15 13:08:51,588 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:51,700 INFO L225 Difference]: With dead ends: 38461 [2022-02-15 13:08:51,700 INFO L226 Difference]: Without dead ends: 38441 [2022-02-15 13:08:51,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1643, Invalid=5667, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 13:08:51,701 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 416 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:51,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 327 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:08:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38441 states. [2022-02-15 13:08:52,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38441 to 19701. [2022-02-15 13:08:52,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19701 states, 19700 states have (on average 3.814517766497462) internal successors, (75146), 19700 states have internal predecessors, (75146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19701 states to 19701 states and 75146 transitions. [2022-02-15 13:08:52,426 INFO L78 Accepts]: Start accepts. Automaton has 19701 states and 75146 transitions. Word has length 25 [2022-02-15 13:08:52,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:52,426 INFO L470 AbstractCegarLoop]: Abstraction has 19701 states and 75146 transitions. [2022-02-15 13:08:52,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand 19701 states and 75146 transitions. [2022-02-15 13:08:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:52,462 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:52,462 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:52,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-02-15 13:08:52,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:52,675 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:52,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:52,675 INFO L85 PathProgramCache]: Analyzing trace with hash 317391460, now seen corresponding path program 34 times [2022-02-15 13:08:52,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:52,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151109029] [2022-02-15 13:08:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:52,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:52,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:52,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151109029] [2022-02-15 13:08:52,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151109029] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:52,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433361250] [2022-02-15 13:08:52,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:08:52,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:52,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:52,707 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:52,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-15 13:08:52,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:08:52,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:08:52,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:52,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:52,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433361250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:52,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:52,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-15 13:08:52,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795626624] [2022-02-15 13:08:52,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:52,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:08:52,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:52,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:08:52,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:08:52,998 INFO L87 Difference]: Start difference. First operand 19701 states and 75146 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:54,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:54,149 INFO L93 Difference]: Finished difference Result 42407 states and 150603 transitions. [2022-02-15 13:08:54,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 13:08:54,149 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:54,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:54,279 INFO L225 Difference]: With dead ends: 42407 [2022-02-15 13:08:54,279 INFO L226 Difference]: Without dead ends: 42407 [2022-02-15 13:08:54,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1245, Invalid=3585, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:08:54,280 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 352 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:54,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 283 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:08:54,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42407 states. [2022-02-15 13:08:54,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42407 to 19861. [2022-02-15 13:08:55,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19861 states, 19860 states have (on average 3.8128398791540787) internal successors, (75723), 19860 states have internal predecessors, (75723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:55,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19861 states to 19861 states and 75723 transitions. [2022-02-15 13:08:55,090 INFO L78 Accepts]: Start accepts. Automaton has 19861 states and 75723 transitions. Word has length 25 [2022-02-15 13:08:55,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:55,090 INFO L470 AbstractCegarLoop]: Abstraction has 19861 states and 75723 transitions. [2022-02-15 13:08:55,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:55,090 INFO L276 IsEmpty]: Start isEmpty. Operand 19861 states and 75723 transitions. [2022-02-15 13:08:55,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:55,202 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:55,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:55,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:55,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:55,415 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:55,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1954857304, now seen corresponding path program 35 times [2022-02-15 13:08:55,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:55,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99918045] [2022-02-15 13:08:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:55,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:55,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:55,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99918045] [2022-02-15 13:08:55,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99918045] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:55,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682926052] [2022-02-15 13:08:55,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:08:55,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:55,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:55,476 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:55,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-15 13:08:55,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:08:55,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:55,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:08:55,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:55,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:55,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682926052] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:55,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:55,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-15 13:08:55,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324670986] [2022-02-15 13:08:55,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:55,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:08:55,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:55,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:08:55,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:08:55,704 INFO L87 Difference]: Start difference. First operand 19861 states and 75723 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:57,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:57,126 INFO L93 Difference]: Finished difference Result 29050 states and 104041 transitions. [2022-02-15 13:08:57,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-15 13:08:57,126 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:08:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:57,202 INFO L225 Difference]: With dead ends: 29050 [2022-02-15 13:08:57,202 INFO L226 Difference]: Without dead ends: 29030 [2022-02-15 13:08:57,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2589 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1603, Invalid=6053, Unknown=0, NotChecked=0, Total=7656 [2022-02-15 13:08:57,203 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 357 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:57,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 265 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:08:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29030 states. [2022-02-15 13:08:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29030 to 19891. [2022-02-15 13:08:57,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19891 states, 19890 states have (on average 3.8126696832579188) internal successors, (75834), 19890 states have internal predecessors, (75834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19891 states to 19891 states and 75834 transitions. [2022-02-15 13:08:57,790 INFO L78 Accepts]: Start accepts. Automaton has 19891 states and 75834 transitions. Word has length 25 [2022-02-15 13:08:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:08:57,790 INFO L470 AbstractCegarLoop]: Abstraction has 19891 states and 75834 transitions. [2022-02-15 13:08:57,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:08:57,790 INFO L276 IsEmpty]: Start isEmpty. Operand 19891 states and 75834 transitions. [2022-02-15 13:08:57,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:08:57,826 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:08:57,826 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:08:57,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-02-15 13:08:58,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:58,041 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:08:58,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:08:58,042 INFO L85 PathProgramCache]: Analyzing trace with hash -653679320, now seen corresponding path program 36 times [2022-02-15 13:08:58,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:08:58,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754286463] [2022-02-15 13:08:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:08:58,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:08:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:08:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:58,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:08:58,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754286463] [2022-02-15 13:08:58,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754286463] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:08:58,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041299168] [2022-02-15 13:08:58,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:08:58,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:08:58,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:08:58,089 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:08:58,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-15 13:08:58,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:08:58,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:08:58,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:08:58,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:08:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:58,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:08:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:08:58,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041299168] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:08:58,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:08:58,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-15 13:08:58,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042271094] [2022-02-15 13:08:58,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:08:58,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:08:58,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:08:58,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:08:58,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:08:58,300 INFO L87 Difference]: Start difference. First operand 19891 states and 75834 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-02-15 13:08:59,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:08:59,438 INFO L93 Difference]: Finished difference Result 27444 states and 99436 transitions. [2022-02-15 13:08:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 13:08:59,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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 25 [2022-02-15 13:08:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:08:59,519 INFO L225 Difference]: With dead ends: 27444 [2022-02-15 13:08:59,519 INFO L226 Difference]: Without dead ends: 27416 [2022-02-15 13:08:59,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=988, Invalid=3568, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 13:08:59,520 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 335 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:08:59,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 238 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:08:59,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27416 states. [2022-02-15 13:08:59,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27416 to 19843. [2022-02-15 13:08:59,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19843 states, 19842 states have (on average 3.81267009374055) internal successors, (75651), 19842 states have internal predecessors, (75651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:00,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19843 states to 19843 states and 75651 transitions. [2022-02-15 13:09:00,163 INFO L78 Accepts]: Start accepts. Automaton has 19843 states and 75651 transitions. Word has length 25 [2022-02-15 13:09:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:00,163 INFO L470 AbstractCegarLoop]: Abstraction has 19843 states and 75651 transitions. [2022-02-15 13:09:00,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 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) [2022-02-15 13:09:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand 19843 states and 75651 transitions. [2022-02-15 13:09:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:00,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:00,198 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:00,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-02-15 13:09:00,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-02-15 13:09:00,411 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:00,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:00,411 INFO L85 PathProgramCache]: Analyzing trace with hash -652057300, now seen corresponding path program 37 times [2022-02-15 13:09:00,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:00,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899813913] [2022-02-15 13:09:00,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:00,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:00,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:00,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899813913] [2022-02-15 13:09:00,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899813913] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:00,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753367772] [2022-02-15 13:09:00,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:09:00,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:00,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:00,445 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:00,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-15 13:09:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:00,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:09:00,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:00,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:00,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753367772] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:00,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:00,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-15 13:09:00,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122811325] [2022-02-15 13:09:00,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:00,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:09:00,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:00,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:09:00,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:09:00,632 INFO L87 Difference]: Start difference. First operand 19843 states and 75651 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:02,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:02,164 INFO L93 Difference]: Finished difference Result 44907 states and 159794 transitions. [2022-02-15 13:09:02,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 13:09:02,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:02,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:02,507 INFO L225 Difference]: With dead ends: 44907 [2022-02-15 13:09:02,507 INFO L226 Difference]: Without dead ends: 44907 [2022-02-15 13:09:02,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1347, Invalid=4055, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 13:09:02,508 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 356 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:02,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 322 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:09:02,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44907 states. [2022-02-15 13:09:03,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44907 to 20040. [2022-02-15 13:09:03,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20040 states, 20039 states have (on average 3.822945256749339) internal successors, (76608), 20039 states have internal predecessors, (76608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:03,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20040 states to 20040 states and 76608 transitions. [2022-02-15 13:09:03,468 INFO L78 Accepts]: Start accepts. Automaton has 20040 states and 76608 transitions. Word has length 25 [2022-02-15 13:09:03,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:03,468 INFO L470 AbstractCegarLoop]: Abstraction has 20040 states and 76608 transitions. [2022-02-15 13:09:03,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:03,469 INFO L276 IsEmpty]: Start isEmpty. Operand 20040 states and 76608 transitions. [2022-02-15 13:09:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:03,502 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:03,503 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:03,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-02-15 13:09:03,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-02-15 13:09:03,715 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:03,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1522968036, now seen corresponding path program 38 times [2022-02-15 13:09:03,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:03,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359656544] [2022-02-15 13:09:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:03,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:03,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:03,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359656544] [2022-02-15 13:09:03,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359656544] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:03,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391376668] [2022-02-15 13:09:03,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:09:03,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:03,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:03,773 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:03,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-15 13:09:03,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:09:03,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:03,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:09:03,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:03,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:03,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391376668] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:03,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:03,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-02-15 13:09:03,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150455792] [2022-02-15 13:09:03,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:03,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 13:09:03,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:03,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 13:09:03,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:09:03,969 INFO L87 Difference]: Start difference. First operand 20040 states and 76608 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:05,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:05,106 INFO L93 Difference]: Finished difference Result 38585 states and 138924 transitions. [2022-02-15 13:09:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 13:09:05,106 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:05,227 INFO L225 Difference]: With dead ends: 38585 [2022-02-15 13:09:05,227 INFO L226 Difference]: Without dead ends: 38559 [2022-02-15 13:09:05,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1087, Invalid=3605, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:09:05,228 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 303 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:05,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 313 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:09:05,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38559 states. [2022-02-15 13:09:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38559 to 18199. [2022-02-15 13:09:05,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18199 states, 18198 states have (on average 3.7716232553027806) internal successors, (68636), 18198 states have internal predecessors, (68636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18199 states to 18199 states and 68636 transitions. [2022-02-15 13:09:05,899 INFO L78 Accepts]: Start accepts. Automaton has 18199 states and 68636 transitions. Word has length 25 [2022-02-15 13:09:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:05,899 INFO L470 AbstractCegarLoop]: Abstraction has 18199 states and 68636 transitions. [2022-02-15 13:09:05,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 18199 states and 68636 transitions. [2022-02-15 13:09:05,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:05,936 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:05,936 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:05,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:06,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-02-15 13:09:06,151 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:06,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:06,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1679166192, now seen corresponding path program 39 times [2022-02-15 13:09:06,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:06,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364046871] [2022-02-15 13:09:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:06,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:06,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:06,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364046871] [2022-02-15 13:09:06,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364046871] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:06,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546434965] [2022-02-15 13:09:06,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:09:06,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:06,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:06,195 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:06,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-15 13:09:06,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:09:06,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:06,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:09:06,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:06,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:06,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546434965] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:06,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:06,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2022-02-15 13:09:06,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010388445] [2022-02-15 13:09:06,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:06,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:09:06,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:06,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:09:06,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:09:06,441 INFO L87 Difference]: Start difference. First operand 18199 states and 68636 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:07,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:07,706 INFO L93 Difference]: Finished difference Result 40360 states and 142259 transitions. [2022-02-15 13:09:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:09:07,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:07,833 INFO L225 Difference]: With dead ends: 40360 [2022-02-15 13:09:07,833 INFO L226 Difference]: Without dead ends: 40255 [2022-02-15 13:09:07,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=979, Invalid=3311, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 13:09:07,834 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 332 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:07,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 360 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:09:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40255 states. [2022-02-15 13:09:08,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40255 to 20551. [2022-02-15 13:09:08,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20551 states, 20550 states have (on average 3.7790267639902675) internal successors, (77659), 20550 states have internal predecessors, (77659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:08,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20551 states to 20551 states and 77659 transitions. [2022-02-15 13:09:08,674 INFO L78 Accepts]: Start accepts. Automaton has 20551 states and 77659 transitions. Word has length 25 [2022-02-15 13:09:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:08,674 INFO L470 AbstractCegarLoop]: Abstraction has 20551 states and 77659 transitions. [2022-02-15 13:09:08,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:08,674 INFO L276 IsEmpty]: Start isEmpty. Operand 20551 states and 77659 transitions. [2022-02-15 13:09:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:08,718 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:08,718 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:08,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:08,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-15 13:09:08,933 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:08,934 INFO L85 PathProgramCache]: Analyzing trace with hash 279298928, now seen corresponding path program 40 times [2022-02-15 13:09:08,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:08,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620516833] [2022-02-15 13:09:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:08,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:08,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:08,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620516833] [2022-02-15 13:09:08,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620516833] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:08,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984971716] [2022-02-15 13:09:08,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:09:08,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:08,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:08,970 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:08,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-15 13:09:08,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:09:08,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:08,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:08,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:09,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:09,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984971716] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:09,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:09,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-15 13:09:09,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171880957] [2022-02-15 13:09:09,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:09,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:09:09,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:09,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:09:09,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:09:09,130 INFO L87 Difference]: Start difference. First operand 20551 states and 77659 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:09,847 INFO L93 Difference]: Finished difference Result 22941 states and 84154 transitions. [2022-02-15 13:09:09,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 13:09:09,847 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:09,915 INFO L225 Difference]: With dead ends: 22941 [2022-02-15 13:09:09,915 INFO L226 Difference]: Without dead ends: 22933 [2022-02-15 13:09:09,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=830, Invalid=2710, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 13:09:09,916 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 263 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:09,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 332 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:09,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22933 states. [2022-02-15 13:09:10,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22933 to 20586. [2022-02-15 13:09:10,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20586 states, 20585 states have (on average 3.780616954092786) internal successors, (77824), 20585 states have internal predecessors, (77824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20586 states to 20586 states and 77824 transitions. [2022-02-15 13:09:10,512 INFO L78 Accepts]: Start accepts. Automaton has 20586 states and 77824 transitions. Word has length 25 [2022-02-15 13:09:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:10,512 INFO L470 AbstractCegarLoop]: Abstraction has 20586 states and 77824 transitions. [2022-02-15 13:09:10,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 20586 states and 77824 transitions. [2022-02-15 13:09:10,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:10,553 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:10,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:10,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:10,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:10,769 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:10,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:10,770 INFO L85 PathProgramCache]: Analyzing trace with hash -187524200, now seen corresponding path program 41 times [2022-02-15 13:09:10,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:10,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504884701] [2022-02-15 13:09:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:10,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:10,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:10,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504884701] [2022-02-15 13:09:10,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504884701] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:10,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027876679] [2022-02-15 13:09:10,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:09:10,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:10,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:10,815 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:10,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-15 13:09:10,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:09:10,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:10,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:10,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:10,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:09:10,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027876679] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:10,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:10,994 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-02-15 13:09:10,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133093646] [2022-02-15 13:09:10,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:10,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:09:10,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:10,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:09:10,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:09:10,995 INFO L87 Difference]: Start difference. First operand 20586 states and 77824 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:11,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:11,818 INFO L93 Difference]: Finished difference Result 23579 states and 86042 transitions. [2022-02-15 13:09:11,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 13:09:11,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:11,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:11,893 INFO L225 Difference]: With dead ends: 23579 [2022-02-15 13:09:11,893 INFO L226 Difference]: Without dead ends: 23571 [2022-02-15 13:09:11,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=761, Invalid=2545, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 13:09:11,894 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 307 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:11,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 260 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:09:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23571 states. [2022-02-15 13:09:12,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23571 to 20830. [2022-02-15 13:09:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20830 states, 20829 states have (on average 3.7727207259109896) internal successors, (78582), 20829 states have internal predecessors, (78582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20830 states to 20830 states and 78582 transitions. [2022-02-15 13:09:12,500 INFO L78 Accepts]: Start accepts. Automaton has 20830 states and 78582 transitions. Word has length 25 [2022-02-15 13:09:12,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:12,500 INFO L470 AbstractCegarLoop]: Abstraction has 20830 states and 78582 transitions. [2022-02-15 13:09:12,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 20830 states and 78582 transitions. [2022-02-15 13:09:12,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:12,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:12,543 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:12,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:12,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-02-15 13:09:12,759 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:12,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:12,759 INFO L85 PathProgramCache]: Analyzing trace with hash -314399848, now seen corresponding path program 42 times [2022-02-15 13:09:12,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:12,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20654764] [2022-02-15 13:09:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:12,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:12,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:12,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20654764] [2022-02-15 13:09:12,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20654764] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:12,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332530240] [2022-02-15 13:09:12,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:09:12,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:12,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:12,787 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:12,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-15 13:09:12,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:09:12,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:12,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:12,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:12,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:13,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332530240] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:13,026 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:13,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 15 [2022-02-15 13:09:13,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112332249] [2022-02-15 13:09:13,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:13,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 13:09:13,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:13,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 13:09:13,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-15 13:09:13,027 INFO L87 Difference]: Start difference. First operand 20830 states and 78582 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:14,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:14,001 INFO L93 Difference]: Finished difference Result 23174 states and 84978 transitions. [2022-02-15 13:09:14,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:09:14,001 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:14,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:14,062 INFO L225 Difference]: With dead ends: 23174 [2022-02-15 13:09:14,062 INFO L226 Difference]: Without dead ends: 23153 [2022-02-15 13:09:14,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=580, Invalid=2072, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:09:14,063 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 304 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:14,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 211 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:09:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23153 states. [2022-02-15 13:09:14,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23153 to 20830. [2022-02-15 13:09:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20830 states, 20829 states have (on average 3.772144606078064) internal successors, (78570), 20829 states have internal predecessors, (78570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:14,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20830 states to 20830 states and 78570 transitions. [2022-02-15 13:09:14,594 INFO L78 Accepts]: Start accepts. Automaton has 20830 states and 78570 transitions. Word has length 25 [2022-02-15 13:09:14,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:14,594 INFO L470 AbstractCegarLoop]: Abstraction has 20830 states and 78570 transitions. [2022-02-15 13:09:14,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:14,594 INFO L276 IsEmpty]: Start isEmpty. Operand 20830 states and 78570 transitions. [2022-02-15 13:09:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:14,633 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:14,633 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:14,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:14,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:14,849 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:14,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:14,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2144293020, now seen corresponding path program 43 times [2022-02-15 13:09:14,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:14,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115807824] [2022-02-15 13:09:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:14,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:14,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:14,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115807824] [2022-02-15 13:09:14,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115807824] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:14,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918940780] [2022-02-15 13:09:14,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:09:14,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:14,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:14,905 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:14,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-15 13:09:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:14,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:14,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:15,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:15,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918940780] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:15,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:15,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-15 13:09:15,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233312792] [2022-02-15 13:09:15,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:15,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:09:15,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:15,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:09:15,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:09:15,153 INFO L87 Difference]: Start difference. First operand 20830 states and 78570 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:16,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:16,015 INFO L93 Difference]: Finished difference Result 22869 states and 84154 transitions. [2022-02-15 13:09:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 13:09:16,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:16,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:16,072 INFO L225 Difference]: With dead ends: 22869 [2022-02-15 13:09:16,072 INFO L226 Difference]: Without dead ends: 22827 [2022-02-15 13:09:16,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=575, Invalid=2181, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:09:16,073 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 231 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:16,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 247 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:09:16,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22827 states. [2022-02-15 13:09:16,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22827 to 20880. [2022-02-15 13:09:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20880 states, 20879 states have (on average 3.7699602471382727) internal successors, (78713), 20879 states have internal predecessors, (78713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:16,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20880 states to 20880 states and 78713 transitions. [2022-02-15 13:09:16,670 INFO L78 Accepts]: Start accepts. Automaton has 20880 states and 78713 transitions. Word has length 25 [2022-02-15 13:09:16,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:16,670 INFO L470 AbstractCegarLoop]: Abstraction has 20880 states and 78713 transitions. [2022-02-15 13:09:16,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 20880 states and 78713 transitions. [2022-02-15 13:09:16,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:16,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:16,703 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:16,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:16,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:16,918 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:16,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:16,918 INFO L85 PathProgramCache]: Analyzing trace with hash -617290344, now seen corresponding path program 44 times [2022-02-15 13:09:16,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:16,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591541450] [2022-02-15 13:09:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:16,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:16,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:16,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591541450] [2022-02-15 13:09:16,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591541450] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:16,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027811024] [2022-02-15 13:09:16,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:09:16,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:16,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:16,965 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:16,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-15 13:09:16,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:09:16,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:16,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:16,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:17,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:17,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027811024] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:17,194 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:17,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-15 13:09:17,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115865446] [2022-02-15 13:09:17,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:17,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:09:17,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:17,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:09:17,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:09:17,195 INFO L87 Difference]: Start difference. First operand 20880 states and 78713 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:18,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:18,641 INFO L93 Difference]: Finished difference Result 25298 states and 91065 transitions. [2022-02-15 13:09:18,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 13:09:18,641 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:18,705 INFO L225 Difference]: With dead ends: 25298 [2022-02-15 13:09:18,705 INFO L226 Difference]: Without dead ends: 25290 [2022-02-15 13:09:18,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2118 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1533, Invalid=4629, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 13:09:18,705 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 408 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:18,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 280 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:09:18,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25290 states. [2022-02-15 13:09:19,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25290 to 20938. [2022-02-15 13:09:19,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20938 states, 20937 states have (on average 3.7672063810479055) internal successors, (78874), 20937 states have internal predecessors, (78874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20938 states to 20938 states and 78874 transitions. [2022-02-15 13:09:19,223 INFO L78 Accepts]: Start accepts. Automaton has 20938 states and 78874 transitions. Word has length 25 [2022-02-15 13:09:19,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:19,223 INFO L470 AbstractCegarLoop]: Abstraction has 20938 states and 78874 transitions. [2022-02-15 13:09:19,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:19,224 INFO L276 IsEmpty]: Start isEmpty. Operand 20938 states and 78874 transitions. [2022-02-15 13:09:19,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:19,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:19,259 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:19,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:19,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:19,475 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:19,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:19,475 INFO L85 PathProgramCache]: Analyzing trace with hash -744165992, now seen corresponding path program 45 times [2022-02-15 13:09:19,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:19,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67819296] [2022-02-15 13:09:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:19,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:19,530 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:19,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67819296] [2022-02-15 13:09:19,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67819296] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:19,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573188536] [2022-02-15 13:09:19,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:09:19,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:19,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:19,534 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:19,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-15 13:09:19,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:09:19,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:19,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:19,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:19,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:19,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573188536] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:19,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:19,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-15 13:09:19,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295444832] [2022-02-15 13:09:19,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:19,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:09:19,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:19,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:09:19,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:09:19,786 INFO L87 Difference]: Start difference. First operand 20938 states and 78874 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:20,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:20,881 INFO L93 Difference]: Finished difference Result 24738 states and 89541 transitions. [2022-02-15 13:09:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 13:09:20,881 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:20,955 INFO L225 Difference]: With dead ends: 24738 [2022-02-15 13:09:20,956 INFO L226 Difference]: Without dead ends: 24724 [2022-02-15 13:09:20,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1176, Invalid=3794, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 13:09:20,956 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 402 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:20,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 292 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:09:20,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24724 states. [2022-02-15 13:09:21,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24724 to 20870. [2022-02-15 13:09:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20870 states, 20869 states have (on average 3.767502036513489) internal successors, (78624), 20869 states have internal predecessors, (78624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 78624 transitions. [2022-02-15 13:09:21,522 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 78624 transitions. Word has length 25 [2022-02-15 13:09:21,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:21,522 INFO L470 AbstractCegarLoop]: Abstraction has 20870 states and 78624 transitions. [2022-02-15 13:09:21,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:21,522 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 78624 transitions. [2022-02-15 13:09:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:21,562 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:21,562 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:21,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:21,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-02-15 13:09:21,779 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:21,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:21,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1714526876, now seen corresponding path program 46 times [2022-02-15 13:09:21,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:21,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71798184] [2022-02-15 13:09:21,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:21,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:21,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:21,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71798184] [2022-02-15 13:09:21,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71798184] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:21,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487344275] [2022-02-15 13:09:21,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:09:21,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:21,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:21,836 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:21,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-15 13:09:21,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:09:21,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:21,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:21,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:22,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:22,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487344275] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:22,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:22,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-15 13:09:22,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201947982] [2022-02-15 13:09:22,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:22,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:09:22,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:22,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:09:22,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:09:22,125 INFO L87 Difference]: Start difference. First operand 20870 states and 78624 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:23,108 INFO L93 Difference]: Finished difference Result 24543 states and 89002 transitions. [2022-02-15 13:09:23,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 13:09:23,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:23,168 INFO L225 Difference]: With dead ends: 24543 [2022-02-15 13:09:23,168 INFO L226 Difference]: Without dead ends: 24501 [2022-02-15 13:09:23,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=881, Invalid=3025, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 13:09:23,168 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 393 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:23,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 282 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:09:23,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24501 states. [2022-02-15 13:09:23,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24501 to 20870. [2022-02-15 13:09:23,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20870 states, 20869 states have (on average 3.764626958646797) internal successors, (78564), 20869 states have internal predecessors, (78564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:23,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 78564 transitions. [2022-02-15 13:09:23,652 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 78564 transitions. Word has length 25 [2022-02-15 13:09:23,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:23,652 INFO L470 AbstractCegarLoop]: Abstraction has 20870 states and 78564 transitions. [2022-02-15 13:09:23,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:23,652 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 78564 transitions. [2022-02-15 13:09:23,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:23,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:23,690 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:23,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:23,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:23,892 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash -122616932, now seen corresponding path program 47 times [2022-02-15 13:09:23,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:23,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696224612] [2022-02-15 13:09:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:23,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:23,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:23,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696224612] [2022-02-15 13:09:23,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696224612] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:23,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676514125] [2022-02-15 13:09:23,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:09:23,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:23,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:23,956 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:23,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-15 13:09:23,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:09:23,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:23,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:23,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:24,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:24,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676514125] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:24,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:24,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-02-15 13:09:24,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144918852] [2022-02-15 13:09:24,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:24,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:09:24,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:24,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:09:24,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:09:24,164 INFO L87 Difference]: Start difference. First operand 20870 states and 78564 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:25,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:25,374 INFO L93 Difference]: Finished difference Result 25180 states and 90786 transitions. [2022-02-15 13:09:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 13:09:25,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:25,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:25,546 INFO L225 Difference]: With dead ends: 25180 [2022-02-15 13:09:25,546 INFO L226 Difference]: Without dead ends: 25174 [2022-02-15 13:09:25,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1521, Invalid=4641, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 13:09:25,547 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 380 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:25,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 387 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:09:25,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25174 states. [2022-02-15 13:09:25,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25174 to 20939. [2022-02-15 13:09:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20939 states, 20938 states have (on average 3.7627280542554207) internal successors, (78784), 20938 states have internal predecessors, (78784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20939 states to 20939 states and 78784 transitions. [2022-02-15 13:09:26,100 INFO L78 Accepts]: Start accepts. Automaton has 20939 states and 78784 transitions. Word has length 25 [2022-02-15 13:09:26,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:26,100 INFO L470 AbstractCegarLoop]: Abstraction has 20939 states and 78784 transitions. [2022-02-15 13:09:26,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:26,100 INFO L276 IsEmpty]: Start isEmpty. Operand 20939 states and 78784 transitions. [2022-02-15 13:09:26,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:26,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:26,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:26,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-02-15 13:09:26,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:26,361 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:26,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:26,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1464786516, now seen corresponding path program 48 times [2022-02-15 13:09:26,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:26,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314511905] [2022-02-15 13:09:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:26,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:26,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:26,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314511905] [2022-02-15 13:09:26,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314511905] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:26,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148864921] [2022-02-15 13:09:26,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:09:26,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:26,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:26,425 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:26,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-15 13:09:26,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:09:26,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:26,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:09:26,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:26,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:26,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148864921] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:26,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:26,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2022-02-15 13:09:26,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199708889] [2022-02-15 13:09:26,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:26,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:09:26,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:26,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:09:26,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:09:26,690 INFO L87 Difference]: Start difference. First operand 20939 states and 78784 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:28,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:28,123 INFO L93 Difference]: Finished difference Result 58125 states and 204380 transitions. [2022-02-15 13:09:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 13:09:28,139 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:28,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:28,573 INFO L225 Difference]: With dead ends: 58125 [2022-02-15 13:09:28,574 INFO L226 Difference]: Without dead ends: 58111 [2022-02-15 13:09:28,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1068, Invalid=4188, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 13:09:28,574 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 427 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:28,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 388 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:09:28,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58111 states. [2022-02-15 13:09:29,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58111 to 26073. [2022-02-15 13:09:29,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26073 states, 26072 states have (on average 3.828973611537281) internal successors, (99829), 26072 states have internal predecessors, (99829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:29,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26073 states to 26073 states and 99829 transitions. [2022-02-15 13:09:29,762 INFO L78 Accepts]: Start accepts. Automaton has 26073 states and 99829 transitions. Word has length 25 [2022-02-15 13:09:29,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:29,762 INFO L470 AbstractCegarLoop]: Abstraction has 26073 states and 99829 transitions. [2022-02-15 13:09:29,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:29,762 INFO L276 IsEmpty]: Start isEmpty. Operand 26073 states and 99829 transitions. [2022-02-15 13:09:29,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:29,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:29,822 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:29,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:30,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-02-15 13:09:30,037 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:30,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:30,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1012330792, now seen corresponding path program 49 times [2022-02-15 13:09:30,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:30,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728112721] [2022-02-15 13:09:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:30,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:30,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:30,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728112721] [2022-02-15 13:09:30,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728112721] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:30,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206895257] [2022-02-15 13:09:30,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:09:30,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:30,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:30,091 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:30,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-15 13:09:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:30,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:30,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:30,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:30,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206895257] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:30,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:30,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-02-15 13:09:30,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978252575] [2022-02-15 13:09:30,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:30,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:09:30,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:30,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:09:30,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:09:30,396 INFO L87 Difference]: Start difference. First operand 26073 states and 99829 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:32,616 INFO L93 Difference]: Finished difference Result 48693 states and 178339 transitions. [2022-02-15 13:09:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-15 13:09:32,616 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:32,773 INFO L225 Difference]: With dead ends: 48693 [2022-02-15 13:09:32,773 INFO L226 Difference]: Without dead ends: 48685 [2022-02-15 13:09:32,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4289 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2572, Invalid=9418, Unknown=0, NotChecked=0, Total=11990 [2022-02-15 13:09:32,774 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 505 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:32,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 493 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:09:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48685 states. [2022-02-15 13:09:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48685 to 26268. [2022-02-15 13:09:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26268 states, 26267 states have (on average 3.834012258727681) internal successors, (100708), 26267 states have internal predecessors, (100708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26268 states to 26268 states and 100708 transitions. [2022-02-15 13:09:33,785 INFO L78 Accepts]: Start accepts. Automaton has 26268 states and 100708 transitions. Word has length 25 [2022-02-15 13:09:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:33,786 INFO L470 AbstractCegarLoop]: Abstraction has 26268 states and 100708 transitions. [2022-02-15 13:09:33,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 26268 states and 100708 transitions. [2022-02-15 13:09:33,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:33,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:33,836 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:33,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-02-15 13:09:34,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-02-15 13:09:34,052 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:34,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:34,053 INFO L85 PathProgramCache]: Analyzing trace with hash 640471336, now seen corresponding path program 50 times [2022-02-15 13:09:34,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:34,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36534656] [2022-02-15 13:09:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:34,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:34,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:34,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36534656] [2022-02-15 13:09:34,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36534656] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:34,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853917023] [2022-02-15 13:09:34,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:09:34,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:34,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:34,096 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:34,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-15 13:09:34,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:09:34,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:34,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:34,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:34,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:34,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853917023] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:34,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:34,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-02-15 13:09:34,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455090005] [2022-02-15 13:09:34,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:34,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:09:34,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:34,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:09:34,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:09:34,333 INFO L87 Difference]: Start difference. First operand 26268 states and 100708 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:36,242 INFO L93 Difference]: Finished difference Result 44483 states and 163225 transitions. [2022-02-15 13:09:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 13:09:36,242 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:36,388 INFO L225 Difference]: With dead ends: 44483 [2022-02-15 13:09:36,389 INFO L226 Difference]: Without dead ends: 44477 [2022-02-15 13:09:36,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2307 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1624, Invalid=5348, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 13:09:36,389 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 320 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:36,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 521 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:09:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44477 states. [2022-02-15 13:09:37,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44477 to 26193. [2022-02-15 13:09:37,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26193 states, 26192 states have (on average 3.831589798411729) internal successors, (100357), 26192 states have internal predecessors, (100357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26193 states to 26193 states and 100357 transitions. [2022-02-15 13:09:37,407 INFO L78 Accepts]: Start accepts. Automaton has 26193 states and 100357 transitions. Word has length 25 [2022-02-15 13:09:37,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:37,407 INFO L470 AbstractCegarLoop]: Abstraction has 26193 states and 100357 transitions. [2022-02-15 13:09:37,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:37,407 INFO L276 IsEmpty]: Start isEmpty. Operand 26193 states and 100357 transitions. [2022-02-15 13:09:37,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:37,465 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:37,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:37,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-02-15 13:09:37,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-02-15 13:09:37,679 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:37,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:37,680 INFO L85 PathProgramCache]: Analyzing trace with hash 710238820, now seen corresponding path program 51 times [2022-02-15 13:09:37,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:37,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987395664] [2022-02-15 13:09:37,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:37,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:37,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:37,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987395664] [2022-02-15 13:09:37,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987395664] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:37,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925854393] [2022-02-15 13:09:37,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:09:37,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:37,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:37,733 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:37,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-15 13:09:37,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:09:37,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:37,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:09:37,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:37,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:37,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925854393] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:37,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:37,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2022-02-15 13:09:37,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789644719] [2022-02-15 13:09:37,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:37,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 13:09:37,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:37,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 13:09:37,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-02-15 13:09:37,965 INFO L87 Difference]: Start difference. First operand 26193 states and 100357 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:39,266 INFO L93 Difference]: Finished difference Result 52333 states and 186074 transitions. [2022-02-15 13:09:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 13:09:39,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:39,457 INFO L225 Difference]: With dead ends: 52333 [2022-02-15 13:09:39,457 INFO L226 Difference]: Without dead ends: 52301 [2022-02-15 13:09:39,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=965, Invalid=4005, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 13:09:39,458 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 567 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:39,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 314 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:09:39,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52301 states. [2022-02-15 13:09:40,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52301 to 26092. [2022-02-15 13:09:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26092 states, 26091 states have (on average 3.825495381549193) internal successors, (99811), 26091 states have internal predecessors, (99811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26092 states to 26092 states and 99811 transitions. [2022-02-15 13:09:40,560 INFO L78 Accepts]: Start accepts. Automaton has 26092 states and 99811 transitions. Word has length 25 [2022-02-15 13:09:40,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:40,560 INFO L470 AbstractCegarLoop]: Abstraction has 26092 states and 99811 transitions. [2022-02-15 13:09:40,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:40,560 INFO L276 IsEmpty]: Start isEmpty. Operand 26092 states and 99811 transitions. [2022-02-15 13:09:40,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:40,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:40,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:40,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:40,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:40,821 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:40,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:40,821 INFO L85 PathProgramCache]: Analyzing trace with hash -296212516, now seen corresponding path program 52 times [2022-02-15 13:09:40,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:40,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322773249] [2022-02-15 13:09:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:40,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:40,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:40,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:40,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322773249] [2022-02-15 13:09:40,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322773249] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:40,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924253277] [2022-02-15 13:09:40,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:09:40,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:40,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:40,873 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:40,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-15 13:09:40,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:09:40,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:40,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:40,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:41,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:41,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924253277] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:41,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:41,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-02-15 13:09:41,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567741591] [2022-02-15 13:09:41,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:41,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:09:41,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:41,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:09:41,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:09:41,185 INFO L87 Difference]: Start difference. First operand 26092 states and 99811 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:42,841 INFO L93 Difference]: Finished difference Result 34759 states and 128404 transitions. [2022-02-15 13:09:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 13:09:42,841 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:42,961 INFO L225 Difference]: With dead ends: 34759 [2022-02-15 13:09:42,961 INFO L226 Difference]: Without dead ends: 34753 [2022-02-15 13:09:42,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=923, Invalid=3769, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 13:09:42,962 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 250 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:42,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 538 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:09:43,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34753 states. [2022-02-15 13:09:43,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34753 to 26308. [2022-02-15 13:09:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26308 states, 26307 states have (on average 3.821644429239366) internal successors, (100536), 26307 states have internal predecessors, (100536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:43,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26308 states to 26308 states and 100536 transitions. [2022-02-15 13:09:43,871 INFO L78 Accepts]: Start accepts. Automaton has 26308 states and 100536 transitions. Word has length 25 [2022-02-15 13:09:43,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:43,871 INFO L470 AbstractCegarLoop]: Abstraction has 26308 states and 100536 transitions. [2022-02-15 13:09:43,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:43,872 INFO L276 IsEmpty]: Start isEmpty. Operand 26308 states and 100536 transitions. [2022-02-15 13:09:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:43,929 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:43,929 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:43,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-02-15 13:09:44,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-02-15 13:09:44,145 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:44,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:44,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1840364470, now seen corresponding path program 53 times [2022-02-15 13:09:44,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:44,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812254740] [2022-02-15 13:09:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:44,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:44,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:44,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812254740] [2022-02-15 13:09:44,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812254740] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:44,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485771487] [2022-02-15 13:09:44,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:09:44,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:44,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:44,205 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:44,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-15 13:09:44,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:09:44,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:44,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:09:44,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:44,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:44,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485771487] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:44,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:44,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-02-15 13:09:44,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086988519] [2022-02-15 13:09:44,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:44,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:44,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:44,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:44,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:44,375 INFO L87 Difference]: Start difference. First operand 26308 states and 100536 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:45,691 INFO L93 Difference]: Finished difference Result 53460 states and 191246 transitions. [2022-02-15 13:09:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-15 13:09:45,691 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:45,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:45,867 INFO L225 Difference]: With dead ends: 53460 [2022-02-15 13:09:45,868 INFO L226 Difference]: Without dead ends: 53392 [2022-02-15 13:09:45,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1361, Invalid=5445, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 13:09:45,868 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 513 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:45,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 377 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:09:46,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53392 states. [2022-02-15 13:09:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53392 to 26763. [2022-02-15 13:09:46,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26763 states, 26762 states have (on average 3.8272176967341753) internal successors, (102424), 26762 states have internal predecessors, (102424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26763 states to 26763 states and 102424 transitions. [2022-02-15 13:09:47,049 INFO L78 Accepts]: Start accepts. Automaton has 26763 states and 102424 transitions. Word has length 25 [2022-02-15 13:09:47,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:47,049 INFO L470 AbstractCegarLoop]: Abstraction has 26763 states and 102424 transitions. [2022-02-15 13:09:47,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:47,049 INFO L276 IsEmpty]: Start isEmpty. Operand 26763 states and 102424 transitions. [2022-02-15 13:09:47,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:47,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:47,107 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:47,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-02-15 13:09:47,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-02-15 13:09:47,322 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:47,323 INFO L85 PathProgramCache]: Analyzing trace with hash -57991460, now seen corresponding path program 54 times [2022-02-15 13:09:47,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:47,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44529915] [2022-02-15 13:09:47,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:47,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:47,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:47,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44529915] [2022-02-15 13:09:47,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44529915] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:47,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247874627] [2022-02-15 13:09:47,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:09:47,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:47,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:47,380 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:47,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-15 13:09:47,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:09:47,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:47,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:47,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:47,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:47,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247874627] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:47,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:47,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-02-15 13:09:47,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514922154] [2022-02-15 13:09:47,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:47,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:09:47,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:47,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:09:47,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:09:47,669 INFO L87 Difference]: Start difference. First operand 26763 states and 102424 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:49,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:49,146 INFO L93 Difference]: Finished difference Result 30227 states and 112282 transitions. [2022-02-15 13:09:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 13:09:49,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:49,256 INFO L225 Difference]: With dead ends: 30227 [2022-02-15 13:09:49,256 INFO L226 Difference]: Without dead ends: 30199 [2022-02-15 13:09:49,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=998, Invalid=3972, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 13:09:49,257 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 356 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:49,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 481 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:09:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30199 states. [2022-02-15 13:09:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30199 to 26742. [2022-02-15 13:09:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26742 states, 26741 states have (on average 3.828016902883213) internal successors, (102365), 26741 states have internal predecessors, (102365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26742 states to 26742 states and 102365 transitions. [2022-02-15 13:09:50,211 INFO L78 Accepts]: Start accepts. Automaton has 26742 states and 102365 transitions. Word has length 25 [2022-02-15 13:09:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:50,212 INFO L470 AbstractCegarLoop]: Abstraction has 26742 states and 102365 transitions. [2022-02-15 13:09:50,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 26742 states and 102365 transitions. [2022-02-15 13:09:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:50,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:50,296 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:50,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-02-15 13:09:50,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-02-15 13:09:50,499 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:50,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:50,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1046603232, now seen corresponding path program 55 times [2022-02-15 13:09:50,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:50,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439333197] [2022-02-15 13:09:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:50,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:50,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:50,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439333197] [2022-02-15 13:09:50,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439333197] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:50,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617098899] [2022-02-15 13:09:50,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:09:50,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:50,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:50,550 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:50,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-15 13:09:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:50,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:50,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:50,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:50,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617098899] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:50,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:50,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-02-15 13:09:50,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040849643] [2022-02-15 13:09:50,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:50,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:09:50,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:50,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:09:50,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:09:50,816 INFO L87 Difference]: Start difference. First operand 26742 states and 102365 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:52,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:52,413 INFO L93 Difference]: Finished difference Result 30755 states and 113595 transitions. [2022-02-15 13:09:52,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 13:09:52,413 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:52,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:52,516 INFO L225 Difference]: With dead ends: 30755 [2022-02-15 13:09:52,516 INFO L226 Difference]: Without dead ends: 30743 [2022-02-15 13:09:52,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1458, Invalid=5682, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 13:09:52,517 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 381 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:52,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 434 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:09:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30743 states. [2022-02-15 13:09:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30743 to 26432. [2022-02-15 13:09:53,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26432 states, 26431 states have (on average 3.833907154477697) internal successors, (101334), 26431 states have internal predecessors, (101334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:53,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26432 states to 26432 states and 101334 transitions. [2022-02-15 13:09:53,333 INFO L78 Accepts]: Start accepts. Automaton has 26432 states and 101334 transitions. Word has length 25 [2022-02-15 13:09:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:53,333 INFO L470 AbstractCegarLoop]: Abstraction has 26432 states and 101334 transitions. [2022-02-15 13:09:53,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 26432 states and 101334 transitions. [2022-02-15 13:09:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:53,388 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:53,388 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:53,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-02-15 13:09:53,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-02-15 13:09:53,604 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:53,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:53,604 INFO L85 PathProgramCache]: Analyzing trace with hash -431477204, now seen corresponding path program 56 times [2022-02-15 13:09:53,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:53,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295630322] [2022-02-15 13:09:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:53,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:53,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:53,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295630322] [2022-02-15 13:09:53,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295630322] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:53,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965786360] [2022-02-15 13:09:53,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:09:53,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:53,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:53,660 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:53,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-15 13:09:53,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:09:53,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:53,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:53,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:53,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:54,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965786360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:54,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:54,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 19 [2022-02-15 13:09:54,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626829268] [2022-02-15 13:09:54,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:54,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:09:54,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:54,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:09:54,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:09:54,033 INFO L87 Difference]: Start difference. First operand 26432 states and 101334 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:54,970 INFO L93 Difference]: Finished difference Result 30975 states and 114847 transitions. [2022-02-15 13:09:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 13:09:54,970 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:55,062 INFO L225 Difference]: With dead ends: 30975 [2022-02-15 13:09:55,063 INFO L226 Difference]: Without dead ends: 30963 [2022-02-15 13:09:55,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=779, Invalid=2643, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 13:09:55,064 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 330 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:55,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 339 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:09:55,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30963 states. [2022-02-15 13:09:55,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30963 to 26545. [2022-02-15 13:09:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26545 states, 26544 states have (on average 3.8366109101868595) internal successors, (101839), 26544 states have internal predecessors, (101839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:55,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26545 states to 26545 states and 101839 transitions. [2022-02-15 13:09:55,897 INFO L78 Accepts]: Start accepts. Automaton has 26545 states and 101839 transitions. Word has length 25 [2022-02-15 13:09:55,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:55,898 INFO L470 AbstractCegarLoop]: Abstraction has 26545 states and 101839 transitions. [2022-02-15 13:09:55,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:55,898 INFO L276 IsEmpty]: Start isEmpty. Operand 26545 states and 101839 transitions. [2022-02-15 13:09:55,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:55,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:55,959 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:55,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-02-15 13:09:56,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:56,171 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:56,172 INFO L85 PathProgramCache]: Analyzing trace with hash 115487400, now seen corresponding path program 57 times [2022-02-15 13:09:56,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:56,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409794359] [2022-02-15 13:09:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:56,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:56,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:56,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:56,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409794359] [2022-02-15 13:09:56,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409794359] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:56,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514611541] [2022-02-15 13:09:56,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:09:56,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:56,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:56,222 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:56,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-15 13:09:56,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:09:56,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:56,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:56,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:56,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:09:56,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514611541] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:56,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:56,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2022-02-15 13:09:56,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495057521] [2022-02-15 13:09:56,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:56,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:09:56,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:56,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:09:56,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:09:56,485 INFO L87 Difference]: Start difference. First operand 26545 states and 101839 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:09:57,784 INFO L93 Difference]: Finished difference Result 30437 states and 112928 transitions. [2022-02-15 13:09:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 13:09:57,784 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:09:57,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:09:57,903 INFO L225 Difference]: With dead ends: 30437 [2022-02-15 13:09:57,904 INFO L226 Difference]: Without dead ends: 30425 [2022-02-15 13:09:57,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1196, Invalid=4206, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 13:09:57,904 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 308 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:09:57,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 439 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:09:57,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30425 states. [2022-02-15 13:09:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30425 to 26710. [2022-02-15 13:09:58,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26710 states, 26709 states have (on average 3.832640682915871) internal successors, (102366), 26709 states have internal predecessors, (102366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26710 states to 26710 states and 102366 transitions. [2022-02-15 13:09:58,781 INFO L78 Accepts]: Start accepts. Automaton has 26710 states and 102366 transitions. Word has length 25 [2022-02-15 13:09:58,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:09:58,781 INFO L470 AbstractCegarLoop]: Abstraction has 26710 states and 102366 transitions. [2022-02-15 13:09:58,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:09:58,781 INFO L276 IsEmpty]: Start isEmpty. Operand 26710 states and 102366 transitions. [2022-02-15 13:09:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:09:58,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:09:58,837 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:09:58,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-02-15 13:09:59,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:59,052 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:09:59,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:09:59,052 INFO L85 PathProgramCache]: Analyzing trace with hash -584285904, now seen corresponding path program 58 times [2022-02-15 13:09:59,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:09:59,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796912821] [2022-02-15 13:09:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:09:59,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:09:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:09:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:59,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:09:59,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796912821] [2022-02-15 13:09:59,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796912821] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:09:59,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589577961] [2022-02-15 13:09:59,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:09:59,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:09:59,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:09:59,092 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:09:59,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-15 13:09:59,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:09:59,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:09:59,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:09:59,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:09:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:09:59,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:09:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:09:59,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589577961] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:09:59,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:09:59,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2022-02-15 13:09:59,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412454890] [2022-02-15 13:09:59,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:09:59,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:09:59,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:09:59,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:09:59,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:09:59,263 INFO L87 Difference]: Start difference. First operand 26710 states and 102366 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:00,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:00,789 INFO L93 Difference]: Finished difference Result 43697 states and 157609 transitions. [2022-02-15 13:10:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 13:10:00,789 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:10:00,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:00,931 INFO L225 Difference]: With dead ends: 43697 [2022-02-15 13:10:00,931 INFO L226 Difference]: Without dead ends: 43689 [2022-02-15 13:10:00,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1542, Invalid=5264, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 13:10:00,932 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 491 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:00,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 572 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:10:00,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43689 states. [2022-02-15 13:10:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43689 to 26825. [2022-02-15 13:10:01,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26825 states, 26824 states have (on average 3.836937071279451) internal successors, (102922), 26824 states have internal predecessors, (102922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26825 states to 26825 states and 102922 transitions. [2022-02-15 13:10:02,028 INFO L78 Accepts]: Start accepts. Automaton has 26825 states and 102922 transitions. Word has length 25 [2022-02-15 13:10:02,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:02,028 INFO L470 AbstractCegarLoop]: Abstraction has 26825 states and 102922 transitions. [2022-02-15 13:10:02,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:02,028 INFO L276 IsEmpty]: Start isEmpty. Operand 26825 states and 102922 transitions. [2022-02-15 13:10:02,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:10:02,087 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:02,087 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:02,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-02-15 13:10:02,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-15 13:10:02,303 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:10:02,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:02,303 INFO L85 PathProgramCache]: Analyzing trace with hash 452395820, now seen corresponding path program 59 times [2022-02-15 13:10:02,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:02,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672063419] [2022-02-15 13:10:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:02,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:02,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:02,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:02,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672063419] [2022-02-15 13:10:02,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672063419] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:02,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352434044] [2022-02-15 13:10:02,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:10:02,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:02,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:02,356 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:02,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-15 13:10:02,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-15 13:10:02,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:02,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:10:02,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:02,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:10:02,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352434044] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:02,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:02,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 18 [2022-02-15 13:10:02,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849916466] [2022-02-15 13:10:02,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:02,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:10:02,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:02,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:10:02,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:10:02,645 INFO L87 Difference]: Start difference. First operand 26825 states and 102922 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:04,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:04,573 INFO L93 Difference]: Finished difference Result 43966 states and 158338 transitions. [2022-02-15 13:10:04,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 13:10:04,574 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:10:04,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:04,730 INFO L225 Difference]: With dead ends: 43966 [2022-02-15 13:10:04,730 INFO L226 Difference]: Without dead ends: 43940 [2022-02-15 13:10:04,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1604, Invalid=5536, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 13:10:04,731 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 459 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:04,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 487 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 13:10:04,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43940 states. [2022-02-15 13:10:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43940 to 26799. [2022-02-15 13:10:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26799 states, 26798 states have (on average 3.835286215389208) internal successors, (102778), 26798 states have internal predecessors, (102778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26799 states to 26799 states and 102778 transitions. [2022-02-15 13:10:05,743 INFO L78 Accepts]: Start accepts. Automaton has 26799 states and 102778 transitions. Word has length 25 [2022-02-15 13:10:05,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:05,743 INFO L470 AbstractCegarLoop]: Abstraction has 26799 states and 102778 transitions. [2022-02-15 13:10:05,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:05,743 INFO L276 IsEmpty]: Start isEmpty. Operand 26799 states and 102778 transitions. [2022-02-15 13:10:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:10:05,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:05,803 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:05,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:06,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-02-15 13:10:06,018 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:10:06,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:06,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2063114192, now seen corresponding path program 60 times [2022-02-15 13:10:06,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:06,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864005051] [2022-02-15 13:10:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:06,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:06,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:06,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864005051] [2022-02-15 13:10:06,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864005051] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:06,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114110414] [2022-02-15 13:10:06,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:10:06,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:06,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:06,065 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:06,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-15 13:10:06,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:10:06,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:06,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:10:06,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:06,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:06,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114110414] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:06,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:06,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-02-15 13:10:06,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089686768] [2022-02-15 13:10:06,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:06,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:10:06,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:06,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:10:06,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:10:06,482 INFO L87 Difference]: Start difference. First operand 26799 states and 102778 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:07,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:07,825 INFO L93 Difference]: Finished difference Result 32249 states and 119094 transitions. [2022-02-15 13:10:07,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 13:10:07,825 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:10:07,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:07,927 INFO L225 Difference]: With dead ends: 32249 [2022-02-15 13:10:07,927 INFO L226 Difference]: Without dead ends: 32228 [2022-02-15 13:10:07,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=869, Invalid=3421, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 13:10:07,930 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 472 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:07,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 395 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:10:08,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32228 states. [2022-02-15 13:10:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32228 to 26934. [2022-02-15 13:10:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26934 states, 26933 states have (on average 3.8327702075520738) internal successors, (103228), 26933 states have internal predecessors, (103228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26934 states to 26934 states and 103228 transitions. [2022-02-15 13:10:08,816 INFO L78 Accepts]: Start accepts. Automaton has 26934 states and 103228 transitions. Word has length 25 [2022-02-15 13:10:08,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:08,816 INFO L470 AbstractCegarLoop]: Abstraction has 26934 states and 103228 transitions. [2022-02-15 13:10:08,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:08,816 INFO L276 IsEmpty]: Start isEmpty. Operand 26934 states and 103228 transitions. [2022-02-15 13:10:08,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:10:08,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:08,875 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:08,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:09,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-02-15 13:10:09,091 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:10:09,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:09,091 INFO L85 PathProgramCache]: Analyzing trace with hash -958519500, now seen corresponding path program 61 times [2022-02-15 13:10:09,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:09,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527718057] [2022-02-15 13:10:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:09,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:09,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:09,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:09,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527718057] [2022-02-15 13:10:09,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527718057] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:09,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143961608] [2022-02-15 13:10:09,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:10:09,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:09,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:09,136 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:09,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-15 13:10:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:09,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:10:09,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:09,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:09,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143961608] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:09,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:09,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-02-15 13:10:09,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410271428] [2022-02-15 13:10:09,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:09,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:10:09,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:09,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:10:09,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:10:09,365 INFO L87 Difference]: Start difference. First operand 26934 states and 103228 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:10,894 INFO L93 Difference]: Finished difference Result 33621 states and 122812 transitions. [2022-02-15 13:10:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 13:10:10,894 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:10:10,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:11,018 INFO L225 Difference]: With dead ends: 33621 [2022-02-15 13:10:11,018 INFO L226 Difference]: Without dead ends: 33603 [2022-02-15 13:10:11,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2357 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1505, Invalid=5635, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 13:10:11,019 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 462 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:11,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 514 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:10:11,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33603 states. [2022-02-15 13:10:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33603 to 26883. [2022-02-15 13:10:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26883 states, 26882 states have (on average 3.831225355256305) internal successors, (102991), 26882 states have internal predecessors, (102991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26883 states to 26883 states and 102991 transitions. [2022-02-15 13:10:12,121 INFO L78 Accepts]: Start accepts. Automaton has 26883 states and 102991 transitions. Word has length 25 [2022-02-15 13:10:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:12,121 INFO L470 AbstractCegarLoop]: Abstraction has 26883 states and 102991 transitions. [2022-02-15 13:10:12,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 26883 states and 102991 transitions. [2022-02-15 13:10:12,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:10:12,179 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:12,179 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:12,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:12,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-02-15 13:10:12,395 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:10:12,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:12,395 INFO L85 PathProgramCache]: Analyzing trace with hash -610544284, now seen corresponding path program 62 times [2022-02-15 13:10:12,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:12,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380991368] [2022-02-15 13:10:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:12,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:12,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:12,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380991368] [2022-02-15 13:10:12,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380991368] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:12,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801564221] [2022-02-15 13:10:12,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:10:12,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:12,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:12,453 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:12,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:10:12,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:12,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:10:12,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:12,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-15 13:10:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:12,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:12,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801564221] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:12,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:12,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-02-15 13:10:12,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146496189] [2022-02-15 13:10:12,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:12,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:10:12,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:12,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:10:12,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:10:12,630 INFO L87 Difference]: Start difference. First operand 26883 states and 102991 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:13,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:13,922 INFO L93 Difference]: Finished difference Result 31067 states and 115057 transitions. [2022-02-15 13:10:13,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 13:10:13,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:10:13,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:14,027 INFO L225 Difference]: With dead ends: 31067 [2022-02-15 13:10:14,028 INFO L226 Difference]: Without dead ends: 30993 [2022-02-15 13:10:14,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=869, Invalid=3421, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 13:10:14,028 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 374 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:14,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 274 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:10:14,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30993 states. [2022-02-15 13:10:14,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30993 to 27772. [2022-02-15 13:10:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27772 states, 27771 states have (on average 3.8098015915883474) internal successors, (105802), 27771 states have internal predecessors, (105802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27772 states to 27772 states and 105802 transitions. [2022-02-15 13:10:14,971 INFO L78 Accepts]: Start accepts. Automaton has 27772 states and 105802 transitions. Word has length 25 [2022-02-15 13:10:14,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:14,971 INFO L470 AbstractCegarLoop]: Abstraction has 27772 states and 105802 transitions. [2022-02-15 13:10:14,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:14,972 INFO L276 IsEmpty]: Start isEmpty. Operand 27772 states and 105802 transitions. [2022-02-15 13:10:15,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:10:15,036 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:15,037 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:15,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:15,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-02-15 13:10:15,251 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:10:15,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:15,252 INFO L85 PathProgramCache]: Analyzing trace with hash -103092820, now seen corresponding path program 63 times [2022-02-15 13:10:15,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:15,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020215227] [2022-02-15 13:10:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:15,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:15,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:15,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020215227] [2022-02-15 13:10:15,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020215227] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:15,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822056863] [2022-02-15 13:10:15,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:10:15,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:15,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:15,307 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:15,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-15 13:10:15,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:10:15,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:15,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:10:15,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:15,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:15,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822056863] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:15,546 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:15,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-02-15 13:10:15,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776323784] [2022-02-15 13:10:15,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:15,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:10:15,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:15,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:10:15,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:10:15,551 INFO L87 Difference]: Start difference. First operand 27772 states and 105802 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:16,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:16,813 INFO L93 Difference]: Finished difference Result 31519 states and 116453 transitions. [2022-02-15 13:10:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 13:10:16,814 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:10:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:16,915 INFO L225 Difference]: With dead ends: 31519 [2022-02-15 13:10:16,915 INFO L226 Difference]: Without dead ends: 31477 [2022-02-15 13:10:16,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1202, Invalid=4200, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 13:10:16,917 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 389 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:16,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 346 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:10:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31477 states. [2022-02-15 13:10:17,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31477 to 28378. [2022-02-15 13:10:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28378 states, 28377 states have (on average 3.7997674172745532) internal successors, (107826), 28377 states have internal predecessors, (107826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:17,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28378 states to 28378 states and 107826 transitions. [2022-02-15 13:10:17,844 INFO L78 Accepts]: Start accepts. Automaton has 28378 states and 107826 transitions. Word has length 25 [2022-02-15 13:10:17,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:17,844 INFO L470 AbstractCegarLoop]: Abstraction has 28378 states and 107826 transitions. [2022-02-15 13:10:17,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:17,844 INFO L276 IsEmpty]: Start isEmpty. Operand 28378 states and 107826 transitions. [2022-02-15 13:10:17,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:10:17,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:17,909 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:17,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:18,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-02-15 13:10:18,123 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:10:18,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:18,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1001501872, now seen corresponding path program 64 times [2022-02-15 13:10:18,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:18,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142467127] [2022-02-15 13:10:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:18,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:18,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:18,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142467127] [2022-02-15 13:10:18,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142467127] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:18,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951991269] [2022-02-15 13:10:18,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:10:18,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:18,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:18,180 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:18,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-15 13:10:18,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:10:18,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:18,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:10:18,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:18,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:18,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951991269] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:18,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:18,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-02-15 13:10:18,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694217125] [2022-02-15 13:10:18,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:18,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:10:18,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:18,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:10:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:10:18,426 INFO L87 Difference]: Start difference. First operand 28378 states and 107826 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:19,920 INFO L93 Difference]: Finished difference Result 31870 states and 117402 transitions. [2022-02-15 13:10:19,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 13:10:19,920 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:10:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:20,017 INFO L225 Difference]: With dead ends: 31870 [2022-02-15 13:10:20,017 INFO L226 Difference]: Without dead ends: 31852 [2022-02-15 13:10:20,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1606, Invalid=5200, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 13:10:20,018 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 407 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:20,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 439 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:10:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31852 states. [2022-02-15 13:10:20,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31852 to 28168. [2022-02-15 13:10:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28168 states, 28167 states have (on average 3.804381013242447) internal successors, (107158), 28167 states have internal predecessors, (107158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28168 states to 28168 states and 107158 transitions. [2022-02-15 13:10:20,762 INFO L78 Accepts]: Start accepts. Automaton has 28168 states and 107158 transitions. Word has length 25 [2022-02-15 13:10:20,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:20,763 INFO L470 AbstractCegarLoop]: Abstraction has 28168 states and 107158 transitions. [2022-02-15 13:10:20,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand 28168 states and 107158 transitions. [2022-02-15 13:10:20,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:10:20,826 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:20,826 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:20,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:21,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:21,032 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:10:21,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:21,032 INFO L85 PathProgramCache]: Analyzing trace with hash 918492762, now seen corresponding path program 44 times [2022-02-15 13:10:21,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:21,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526323482] [2022-02-15 13:10:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:21,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:21,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:21,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526323482] [2022-02-15 13:10:21,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526323482] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:21,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974980487] [2022-02-15 13:10:21,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:10:21,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:21,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:21,064 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:21,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-15 13:10:21,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:10:21,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:21,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:10:21,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:21,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:21,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974980487] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:21,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:21,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-02-15 13:10:21,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394244170] [2022-02-15 13:10:21,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:21,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 13:10:21,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:21,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 13:10:21,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:10:21,211 INFO L87 Difference]: Start difference. First operand 28168 states and 107158 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:21,779 INFO L93 Difference]: Finished difference Result 46026 states and 165452 transitions. [2022-02-15 13:10:21,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:10:21,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:10:21,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:21,937 INFO L225 Difference]: With dead ends: 46026 [2022-02-15 13:10:21,937 INFO L226 Difference]: Without dead ends: 46019 [2022-02-15 13:10:21,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:10:21,937 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 229 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:21,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 139 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:10:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46019 states. [2022-02-15 13:10:22,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46019 to 32278. [2022-02-15 13:10:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32278 states, 32277 states have (on average 3.817238281128977) internal successors, (123209), 32277 states have internal predecessors, (123209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:22,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32278 states to 32278 states and 123209 transitions. [2022-02-15 13:10:22,986 INFO L78 Accepts]: Start accepts. Automaton has 32278 states and 123209 transitions. Word has length 25 [2022-02-15 13:10:22,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:22,986 INFO L470 AbstractCegarLoop]: Abstraction has 32278 states and 123209 transitions. [2022-02-15 13:10:22,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:22,986 INFO L276 IsEmpty]: Start isEmpty. Operand 32278 states and 123209 transitions. [2022-02-15 13:10:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:10:23,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:23,052 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:23,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:23,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:23,267 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:10:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:23,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1754769378, now seen corresponding path program 45 times [2022-02-15 13:10:23,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:23,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523137273] [2022-02-15 13:10:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:23,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:23,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:23,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523137273] [2022-02-15 13:10:23,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523137273] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:23,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196379295] [2022-02-15 13:10:23,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:10:23,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:23,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:23,301 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:23,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-15 13:10:23,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:10:23,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:23,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:10:23,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:23,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:23,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196379295] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:23,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:23,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-02-15 13:10:23,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157604901] [2022-02-15 13:10:23,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:23,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:10:23,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:23,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:10:23,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:10:23,437 INFO L87 Difference]: Start difference. First operand 32278 states and 123209 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:24,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:24,067 INFO L93 Difference]: Finished difference Result 56282 states and 204646 transitions. [2022-02-15 13:10:24,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:10:24,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:10:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:24,280 INFO L225 Difference]: With dead ends: 56282 [2022-02-15 13:10:24,280 INFO L226 Difference]: Without dead ends: 56282 [2022-02-15 13:10:24,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:10:24,281 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 248 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:24,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 97 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:10:24,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56282 states. [2022-02-15 13:10:25,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56282 to 36061. [2022-02-15 13:10:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36061 states, 36060 states have (on average 3.8456461453133666) internal successors, (138674), 36060 states have internal predecessors, (138674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:25,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36061 states to 36061 states and 138674 transitions. [2022-02-15 13:10:25,643 INFO L78 Accepts]: Start accepts. Automaton has 36061 states and 138674 transitions. Word has length 25 [2022-02-15 13:10:25,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:25,643 INFO L470 AbstractCegarLoop]: Abstraction has 36061 states and 138674 transitions. [2022-02-15 13:10:25,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:25,643 INFO L276 IsEmpty]: Start isEmpty. Operand 36061 states and 138674 transitions. [2022-02-15 13:10:25,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:10:25,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:25,900 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:25,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:26,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:26,117 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:10:26,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:26,118 INFO L85 PathProgramCache]: Analyzing trace with hash -234712474, now seen corresponding path program 46 times [2022-02-15 13:10:26,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:26,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089745447] [2022-02-15 13:10:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:26,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:26,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:26,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089745447] [2022-02-15 13:10:26,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089745447] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:26,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537624330] [2022-02-15 13:10:26,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:10:26,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:26,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:26,157 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:26,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-15 13:10:26,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:10:26,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:26,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:10:26,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:26,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:26,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537624330] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:26,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:26,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-02-15 13:10:26,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43325242] [2022-02-15 13:10:26,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:26,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 13:10:26,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 13:10:26,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-02-15 13:10:26,278 INFO L87 Difference]: Start difference. First operand 36061 states and 138674 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:26,685 INFO L93 Difference]: Finished difference Result 51397 states and 189538 transitions. [2022-02-15 13:10:26,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:10:26,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:10:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:26,881 INFO L225 Difference]: With dead ends: 51397 [2022-02-15 13:10:26,881 INFO L226 Difference]: Without dead ends: 51391 [2022-02-15 13:10:26,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:10:26,881 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 238 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:26,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 71 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:10:26,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51391 states. [2022-02-15 13:10:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51391 to 36050. [2022-02-15 13:10:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36050 states, 36049 states have (on average 3.844517184942717) internal successors, (138591), 36049 states have internal predecessors, (138591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36050 states to 36050 states and 138591 transitions. [2022-02-15 13:10:28,356 INFO L78 Accepts]: Start accepts. Automaton has 36050 states and 138591 transitions. Word has length 25 [2022-02-15 13:10:28,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:28,356 INFO L470 AbstractCegarLoop]: Abstraction has 36050 states and 138591 transitions. [2022-02-15 13:10:28,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:28,356 INFO L276 IsEmpty]: Start isEmpty. Operand 36050 states and 138591 transitions. [2022-02-15 13:10:28,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:10:28,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:28,435 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:28,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:28,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:28,651 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:10:28,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:28,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1248422464, now seen corresponding path program 47 times [2022-02-15 13:10:28,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:28,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061112841] [2022-02-15 13:10:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:28,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:28,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:28,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061112841] [2022-02-15 13:10:28,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061112841] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:28,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536821334] [2022-02-15 13:10:28,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:10:28,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:28,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:28,680 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:28,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-15 13:10:28,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:10:28,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:28,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:10:28,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:28,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:28,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536821334] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:28,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:28,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-15 13:10:28,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953025739] [2022-02-15 13:10:28,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:28,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 13:10:28,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:28,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 13:10:28,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-02-15 13:10:28,812 INFO L87 Difference]: Start difference. First operand 36050 states and 138591 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:29,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:29,283 INFO L93 Difference]: Finished difference Result 51468 states and 189710 transitions. [2022-02-15 13:10:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:10:29,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:10:29,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:29,708 INFO L225 Difference]: With dead ends: 51468 [2022-02-15 13:10:29,708 INFO L226 Difference]: Without dead ends: 51450 [2022-02-15 13:10:29,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:10:29,709 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 309 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:29,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 81 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:10:29,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51450 states. [2022-02-15 13:10:30,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51450 to 36034. [2022-02-15 13:10:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36034 states, 36033 states have (on average 3.841783920295285) internal successors, (138431), 36033 states have internal predecessors, (138431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36034 states to 36034 states and 138431 transitions. [2022-02-15 13:10:30,982 INFO L78 Accepts]: Start accepts. Automaton has 36034 states and 138431 transitions. Word has length 25 [2022-02-15 13:10:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:30,982 INFO L470 AbstractCegarLoop]: Abstraction has 36034 states and 138431 transitions. [2022-02-15 13:10:30,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:30,982 INFO L276 IsEmpty]: Start isEmpty. Operand 36034 states and 138431 transitions. [2022-02-15 13:10:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:10:31,074 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:31,074 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:31,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:31,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-02-15 13:10:31,278 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:10:31,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:31,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1500473020, now seen corresponding path program 48 times [2022-02-15 13:10:31,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:31,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338561912] [2022-02-15 13:10:31,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:31,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:31,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:31,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338561912] [2022-02-15 13:10:31,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338561912] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:31,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375121751] [2022-02-15 13:10:31,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:10:31,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:31,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:31,307 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:31,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-15 13:10:31,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:10:31,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:31,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-15 13:10:31,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:31,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:31,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375121751] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:31,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:31,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-02-15 13:10:31,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203205224] [2022-02-15 13:10:31,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:31,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 13:10:31,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:31,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 13:10:31,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-02-15 13:10:31,436 INFO L87 Difference]: Start difference. First operand 36034 states and 138431 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:31,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:31,898 INFO L93 Difference]: Finished difference Result 51306 states and 189111 transitions. [2022-02-15 13:10:31,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:10:31,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:10:31,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:32,316 INFO L225 Difference]: With dead ends: 51306 [2022-02-15 13:10:32,317 INFO L226 Difference]: Without dead ends: 51276 [2022-02-15 13:10:32,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:10:32,317 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 309 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:32,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 79 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:10:32,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51276 states. [2022-02-15 13:10:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51276 to 36160. [2022-02-15 13:10:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36160 states, 36159 states have (on average 3.838103929865317) internal successors, (138782), 36159 states have internal predecessors, (138782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36160 states to 36160 states and 138782 transitions. [2022-02-15 13:10:33,525 INFO L78 Accepts]: Start accepts. Automaton has 36160 states and 138782 transitions. Word has length 25 [2022-02-15 13:10:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:33,526 INFO L470 AbstractCegarLoop]: Abstraction has 36160 states and 138782 transitions. [2022-02-15 13:10:33,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand 36160 states and 138782 transitions. [2022-02-15 13:10:33,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:10:33,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:33,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:33,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:33,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-02-15 13:10:33,830 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:10:33,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:33,830 INFO L85 PathProgramCache]: Analyzing trace with hash 485420698, now seen corresponding path program 65 times [2022-02-15 13:10:33,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:33,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729764919] [2022-02-15 13:10:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:33,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:33,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:33,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729764919] [2022-02-15 13:10:33,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729764919] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:33,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895935716] [2022-02-15 13:10:33,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:10:33,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:33,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:33,869 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:33,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-15 13:10:33,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:10:33,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:33,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:10:33,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:34,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:34,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895935716] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:34,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:34,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-15 13:10:34,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602657041] [2022-02-15 13:10:34,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:34,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:10:34,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:34,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:10:34,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:10:34,056 INFO L87 Difference]: Start difference. First operand 36160 states and 138782 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:36,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:36,099 INFO L93 Difference]: Finished difference Result 78549 states and 292869 transitions. [2022-02-15 13:10:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 13:10:36,099 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:10:36,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:36,393 INFO L225 Difference]: With dead ends: 78549 [2022-02-15 13:10:36,393 INFO L226 Difference]: Without dead ends: 78487 [2022-02-15 13:10:36,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3331 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1861, Invalid=6695, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 13:10:36,394 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 562 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:36,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 309 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:10:36,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78487 states. [2022-02-15 13:10:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78487 to 50005. [2022-02-15 13:10:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50005 states, 50004 states have (on average 3.965042796576274) internal successors, (198268), 50004 states have internal predecessors, (198268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50005 states to 50005 states and 198268 transitions. [2022-02-15 13:10:38,317 INFO L78 Accepts]: Start accepts. Automaton has 50005 states and 198268 transitions. Word has length 25 [2022-02-15 13:10:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:38,318 INFO L470 AbstractCegarLoop]: Abstraction has 50005 states and 198268 transitions. [2022-02-15 13:10:38,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 50005 states and 198268 transitions. [2022-02-15 13:10:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:10:38,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:38,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:38,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-02-15 13:10:38,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:38,845 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:10:38,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:38,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1463978142, now seen corresponding path program 66 times [2022-02-15 13:10:38,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:38,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581284452] [2022-02-15 13:10:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:38,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:38,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:38,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581284452] [2022-02-15 13:10:38,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581284452] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:38,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934041128] [2022-02-15 13:10:38,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:10:38,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:38,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:38,903 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:38,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-15 13:10:38,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:10:38,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:10:38,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:10:38,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:39,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:39,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934041128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:39,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:39,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-15 13:10:39,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880240022] [2022-02-15 13:10:39,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:39,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:10:39,118 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:39,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:10:39,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:10:39,118 INFO L87 Difference]: Start difference. First operand 50005 states and 198268 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:41,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:41,258 INFO L93 Difference]: Finished difference Result 93002 states and 342802 transitions. [2022-02-15 13:10:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 13:10:41,259 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:10:41,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:41,647 INFO L225 Difference]: With dead ends: 93002 [2022-02-15 13:10:41,647 INFO L226 Difference]: Without dead ends: 92967 [2022-02-15 13:10:41,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2101 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1350, Invalid=4350, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 13:10:41,648 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 501 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:41,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 387 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:10:41,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92967 states. [2022-02-15 13:10:43,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92967 to 49731. [2022-02-15 13:10:43,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49731 states, 49730 states have (on average 3.945968228433541) internal successors, (196233), 49730 states have internal predecessors, (196233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:43,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49731 states to 49731 states and 196233 transitions. [2022-02-15 13:10:43,922 INFO L78 Accepts]: Start accepts. Automaton has 49731 states and 196233 transitions. Word has length 25 [2022-02-15 13:10:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:10:43,922 INFO L470 AbstractCegarLoop]: Abstraction has 49731 states and 196233 transitions. [2022-02-15 13:10:43,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 49731 states and 196233 transitions. [2022-02-15 13:10:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 13:10:44,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:10:44,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:10:44,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-02-15 13:10:44,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-02-15 13:10:44,239 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:10:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:10:44,240 INFO L85 PathProgramCache]: Analyzing trace with hash 51810674, now seen corresponding path program 67 times [2022-02-15 13:10:44,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:10:44,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159514483] [2022-02-15 13:10:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:10:44,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:10:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:44,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:10:44,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159514483] [2022-02-15 13:10:44,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159514483] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:10:44,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730045075] [2022-02-15 13:10:44,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:10:44,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:10:44,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:10:44,282 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-15 13:10:44,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-15 13:10:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:10:44,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-15 13:10:44,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:10:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:10:44,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:10:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:10:44,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730045075] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:10:44,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:10:44,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-02-15 13:10:44,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231485994] [2022-02-15 13:10:44,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:10:44,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 13:10:44,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:10:44,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 13:10:44,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-15 13:10:44,482 INFO L87 Difference]: Start difference. First operand 49731 states and 196233 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:10:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:10:46,619 INFO L93 Difference]: Finished difference Result 103567 states and 382759 transitions. [2022-02-15 13:10:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 13:10:46,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-02-15 13:10:46,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:10:47,283 INFO L225 Difference]: With dead ends: 103567 [2022-02-15 13:10:47,284 INFO L226 Difference]: Without dead ends: 103546 [2022-02-15 13:10:47,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1148, Invalid=3682, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 13:10:47,284 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 386 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:10:47,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 268 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:10:47,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103546 states.