/usr/bin/java -Xmx16000000000 -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/parallel/min-max-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 05:20:45,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 05:20:45,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 05:20:45,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 05:20:45,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 05:20:45,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 05:20:45,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 05:20:45,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 05:20:45,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 05:20:45,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 05:20:45,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 05:20:45,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-18 05:20:45,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 05:20:45,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 05:20:45,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 05:20:45,844 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-01-18 05:20:45,862 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 05:20:45,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 05:20:45,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 05:20:45,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 05:20:45,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 05:20:45,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 05:20:45,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 05:20:45,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 05:20:45,865 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 05:20:45,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 05:20:45,866 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 05:20:45,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 05:20:45,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 05:20:45,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 05:20:45,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 05:20:45,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 05:20:45,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 05:20:45,866 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 05:20:45,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 05:20:45,866 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 05:20:45,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 05:20:45,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 05:20:45,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 05:20:45,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 05:20:45,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 05:20:45,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:20:45,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 05:20:45,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 05:20:45,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 05:20:45,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 05:20:45,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 05:20:45,869 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 05:20:45,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 05:20:45,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 05:20:46,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 05:20:46,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 05:20:46,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 05:20:46,079 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 05:20:46,081 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 05:20:46,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl [2022-01-18 05:20:46,083 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl' [2022-01-18 05:20:46,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 05:20:46,102 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 05:20:46,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 05:20:46,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 05:20:46,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 05:20:46,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:20:46" (1/1) ... [2022-01-18 05:20:46,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:20:46" (1/1) ... [2022-01-18 05:20:46,123 INFO L137 Inliner]: procedures = 6, calls = 5, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 05:20:46,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 05:20:46,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 05:20:46,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 05:20:46,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 05:20:46,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:20:46" (1/1) ... [2022-01-18 05:20:46,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:20:46" (1/1) ... [2022-01-18 05:20:46,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:20:46" (1/1) ... [2022-01-18 05:20:46,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:20:46" (1/1) ... [2022-01-18 05:20:46,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:20:46" (1/1) ... [2022-01-18 05:20:46,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:20:46" (1/1) ... [2022-01-18 05:20:46,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:20:46" (1/1) ... [2022-01-18 05:20:46,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 05:20:46,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 05:20:46,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 05:20:46,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 05:20:46,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:20:46" (1/1) ... [2022-01-18 05:20:46,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 05:20:46,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:20:46,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 05:20:46,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 05:20:46,236 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 05:20:46,236 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 05:20:46,236 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 05:20:46,238 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 05:20:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 05:20:46,238 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 05:20:46,238 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 05:20:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 05:20:46,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 05:20:46,239 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 05:20:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 05:20:46,239 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 05:20:46,239 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-18 05:20:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-18 05:20:46,240 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-18 05:20:46,240 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2022-01-18 05:20:46,240 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-01-18 05:20:46,240 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-01-18 05:20:46,249 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 05:20:46,292 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 05:20:46,293 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 05:20:46,371 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 05:20:46,376 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 05:20:46,376 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 05:20:46,377 INFO L202 PluginConnector]: Adding new model min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:20:46 BoogieIcfgContainer [2022-01-18 05:20:46,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 05:20:46,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 05:20:46,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 05:20:46,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 05:20:46,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:20:46" (1/2) ... [2022-01-18 05:20:46,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398cfda6 and model type min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:20:46, skipping insertion in model container [2022-01-18 05:20:46,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:20:46" (2/2) ... [2022-01-18 05:20:46,396 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-2.wvr.bpl [2022-01-18 05:20:46,399 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 05:20:46,399 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 05:20:46,400 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 05:20:46,400 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 05:20:46,490 INFO L148 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-01-18 05:20:46,548 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 05:20:46,552 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 05:20:46,553 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-01-18 05:20:46,559 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 46 transitions, 132 flow [2022-01-18 05:20:46,842 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5824 states, 5823 states have (on average 4.66958612399107) internal successors, (27191), 5823 states have internal predecessors, (27191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:46,861 INFO L276 IsEmpty]: Start isEmpty. Operand has 5824 states, 5823 states have (on average 4.66958612399107) internal successors, (27191), 5823 states have internal predecessors, (27191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 05:20:46,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:20:46,906 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, 1, 1, 1, 1, 1, 1] [2022-01-18 05:20:46,906 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:20:46,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:20:46,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2136423211, now seen corresponding path program 1 times [2022-01-18 05:20:46,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:20:46,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95195547] [2022-01-18 05:20:46,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:20:46,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:20:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:20:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:47,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:20:47,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95195547] [2022-01-18 05:20:47,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95195547] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:20:47,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:20:47,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:20:47,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997636401] [2022-01-18 05:20:47,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:20:47,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:20:47,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:20:47,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:20:47,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:20:47,170 INFO L87 Difference]: Start difference. First operand has 5824 states, 5823 states have (on average 4.66958612399107) internal successors, (27191), 5823 states have internal predecessors, (27191), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:47,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:20:47,739 INFO L93 Difference]: Finished difference Result 23171 states and 106643 transitions. [2022-01-18 05:20:47,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:20:47,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 05:20:47,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:20:47,900 INFO L225 Difference]: With dead ends: 23171 [2022-01-18 05:20:47,900 INFO L226 Difference]: Without dead ends: 15763 [2022-01-18 05:20:47,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:20:47,906 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 135 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:20:47,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 264 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:20:48,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15763 states. [2022-01-18 05:20:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15763 to 7383. [2022-01-18 05:20:48,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7383 states, 7382 states have (on average 4.632078027634788) internal successors, (34194), 7382 states have internal predecessors, (34194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7383 states to 7383 states and 34194 transitions. [2022-01-18 05:20:48,466 INFO L78 Accepts]: Start accepts. Automaton has 7383 states and 34194 transitions. Word has length 27 [2022-01-18 05:20:48,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:20:48,466 INFO L470 AbstractCegarLoop]: Abstraction has 7383 states and 34194 transitions. [2022-01-18 05:20:48,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 7383 states and 34194 transitions. [2022-01-18 05:20:48,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 05:20:48,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:20:48,486 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, 1, 1, 1, 1, 1, 1] [2022-01-18 05:20:48,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 05:20:48,487 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:20:48,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:20:48,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1694783063, now seen corresponding path program 2 times [2022-01-18 05:20:48,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:20:48,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578697827] [2022-01-18 05:20:48,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:20:48,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:20:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:20:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:48,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:20:48,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578697827] [2022-01-18 05:20:48,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578697827] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:20:48,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:20:48,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:20:48,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995095996] [2022-01-18 05:20:48,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:20:48,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:20:48,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:20:48,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:20:48,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:20:48,544 INFO L87 Difference]: Start difference. First operand 7383 states and 34194 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:48,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:20:48,774 INFO L93 Difference]: Finished difference Result 9446 states and 43398 transitions. [2022-01-18 05:20:48,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:20:48,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 05:20:48,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:20:48,809 INFO L225 Difference]: With dead ends: 9446 [2022-01-18 05:20:48,810 INFO L226 Difference]: Without dead ends: 6583 [2022-01-18 05:20:48,810 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 [2022-01-18 05:20:48,816 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 49 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:20:48,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 126 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:20:48,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2022-01-18 05:20:48,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6583. [2022-01-18 05:20:49,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 6582 states have (on average 4.564570039501671) internal successors, (30044), 6582 states have internal predecessors, (30044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 30044 transitions. [2022-01-18 05:20:49,033 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 30044 transitions. Word has length 27 [2022-01-18 05:20:49,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:20:49,034 INFO L470 AbstractCegarLoop]: Abstraction has 6583 states and 30044 transitions. [2022-01-18 05:20:49,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:49,034 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 30044 transitions. [2022-01-18 05:20:49,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 05:20:49,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:20:49,057 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, 1, 1, 1, 1, 1, 1] [2022-01-18 05:20:49,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 05:20:49,058 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:20:49,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:20:49,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1387431189, now seen corresponding path program 3 times [2022-01-18 05:20:49,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:20:49,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473838409] [2022-01-18 05:20:49,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:20:49,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:20:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:20:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:49,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:20:49,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473838409] [2022-01-18 05:20:49,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473838409] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:20:49,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:20:49,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 05:20:49,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071698694] [2022-01-18 05:20:49,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:20:49,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:20:49,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:20:49,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:20:49,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:20:49,119 INFO L87 Difference]: Start difference. First operand 6583 states and 30044 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:49,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:20:49,602 INFO L93 Difference]: Finished difference Result 22801 states and 103818 transitions. [2022-01-18 05:20:49,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:20:49,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 05:20:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:20:49,825 INFO L225 Difference]: With dead ends: 22801 [2022-01-18 05:20:49,825 INFO L226 Difference]: Without dead ends: 16593 [2022-01-18 05:20:49,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:20:49,831 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 117 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:20:49,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 273 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:20:49,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16593 states. [2022-01-18 05:20:50,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16593 to 6861. [2022-01-18 05:20:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6861 states, 6860 states have (on average 4.574052478134111) internal successors, (31378), 6860 states have internal predecessors, (31378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:50,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 31378 transitions. [2022-01-18 05:20:50,140 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 31378 transitions. Word has length 27 [2022-01-18 05:20:50,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:20:50,140 INFO L470 AbstractCegarLoop]: Abstraction has 6861 states and 31378 transitions. [2022-01-18 05:20:50,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:50,140 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 31378 transitions. [2022-01-18 05:20:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-18 05:20:50,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:20:50,156 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, 1, 1, 1, 1, 1, 1] [2022-01-18 05:20:50,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 05:20:50,156 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:20:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:20:50,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1055757637, now seen corresponding path program 4 times [2022-01-18 05:20:50,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:20:50,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892375973] [2022-01-18 05:20:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:20:50,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:20:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:20:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:50,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:20:50,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892375973] [2022-01-18 05:20:50,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892375973] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:20:50,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:20:50,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:20:50,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240934957] [2022-01-18 05:20:50,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:20:50,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:20:50,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:20:50,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:20:50,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:20:50,182 INFO L87 Difference]: Start difference. First operand 6861 states and 31378 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:50,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:20:50,339 INFO L93 Difference]: Finished difference Result 8424 states and 38332 transitions. [2022-01-18 05:20:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:20:50,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-18 05:20:50,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:20:50,383 INFO L225 Difference]: With dead ends: 8424 [2022-01-18 05:20:50,384 INFO L226 Difference]: Without dead ends: 6361 [2022-01-18 05:20:50,384 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 [2022-01-18 05:20:50,384 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 43 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:20:50,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 121 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:20:50,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2022-01-18 05:20:50,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 6361. [2022-01-18 05:20:50,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6361 states, 6360 states have (on average 4.524842767295597) internal successors, (28778), 6360 states have internal predecessors, (28778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 28778 transitions. [2022-01-18 05:20:50,666 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 28778 transitions. Word has length 27 [2022-01-18 05:20:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:20:50,666 INFO L470 AbstractCegarLoop]: Abstraction has 6361 states and 28778 transitions. [2022-01-18 05:20:50,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:50,666 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 28778 transitions. [2022-01-18 05:20:50,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 05:20:50,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:20:50,688 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:20:50,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 05:20:50,688 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:20:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:20:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash 243141281, now seen corresponding path program 1 times [2022-01-18 05:20:50,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:20:50,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404498218] [2022-01-18 05:20:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:20:50,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:20:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:20:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:50,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:20:50,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404498218] [2022-01-18 05:20:50,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404498218] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:20:50,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616239272] [2022-01-18 05:20:50,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:20:50,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:20:50,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:20:50,778 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:20:50,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 05:20:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:20:50,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 05:20:50,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:20:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:50,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:20:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:50,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616239272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:20:50,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:20:50,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-18 05:20:50,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188874838] [2022-01-18 05:20:50,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:20:50,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 05:20:50,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:20:50,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 05:20:50,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:20:50,990 INFO L87 Difference]: Start difference. First operand 6361 states and 28778 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2022-01-18 05:20:51,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:20:51,160 INFO L93 Difference]: Finished difference Result 13742 states and 61751 transitions. [2022-01-18 05:20:51,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 05:20:51,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 30 [2022-01-18 05:20:51,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:20:51,212 INFO L225 Difference]: With dead ends: 13742 [2022-01-18 05:20:51,213 INFO L226 Difference]: Without dead ends: 13742 [2022-01-18 05:20:51,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:20:51,214 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 184 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:20:51,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 115 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:20:51,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2022-01-18 05:20:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7994. [2022-01-18 05:20:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7994 states, 7993 states have (on average 4.5614913048917805) internal successors, (36460), 7993 states have internal predecessors, (36460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 36460 transitions. [2022-01-18 05:20:51,561 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 36460 transitions. Word has length 30 [2022-01-18 05:20:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:20:51,561 INFO L470 AbstractCegarLoop]: Abstraction has 7994 states and 36460 transitions. [2022-01-18 05:20:51,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2022-01-18 05:20:51,561 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 36460 transitions. [2022-01-18 05:20:51,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 05:20:51,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:20:51,579 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:20:51,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 05:20:51,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:20:51,794 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:20:51,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:20:51,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1679087144, now seen corresponding path program 1 times [2022-01-18 05:20:51,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:20:51,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271852762] [2022-01-18 05:20:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:20:51,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:20:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:20:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:51,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:20:51,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271852762] [2022-01-18 05:20:51,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271852762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:20:51,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896737274] [2022-01-18 05:20:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:20:51,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:20:51,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:20:51,906 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:20:51,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 05:20:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:20:51,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 05:20:51,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:20:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:52,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 05:20:52,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896737274] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:20:52,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 05:20:52,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-01-18 05:20:52,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660696398] [2022-01-18 05:20:52,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:20:52,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:20:52,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:20:52,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:20:52,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:20:52,010 INFO L87 Difference]: Start difference. First operand 7994 states and 36460 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:20:52,126 INFO L93 Difference]: Finished difference Result 11412 states and 52000 transitions. [2022-01-18 05:20:52,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:20:52,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 05:20:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:20:52,166 INFO L225 Difference]: With dead ends: 11412 [2022-01-18 05:20:52,167 INFO L226 Difference]: Without dead ends: 11118 [2022-01-18 05:20:52,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:20:52,169 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 88 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:20:52,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 73 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:20:52,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2022-01-18 05:20:52,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 8742. [2022-01-18 05:20:52,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8742 states, 8741 states have (on average 4.594554398810205) internal successors, (40161), 8741 states have internal predecessors, (40161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:52,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 40161 transitions. [2022-01-18 05:20:52,521 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 40161 transitions. Word has length 30 [2022-01-18 05:20:52,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:20:52,521 INFO L470 AbstractCegarLoop]: Abstraction has 8742 states and 40161 transitions. [2022-01-18 05:20:52,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:52,521 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 40161 transitions. [2022-01-18 05:20:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 05:20:52,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:20:52,543 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:20:52,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 05:20:52,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-18 05:20:52,756 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:20:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:20:52,757 INFO L85 PathProgramCache]: Analyzing trace with hash -43418172, now seen corresponding path program 1 times [2022-01-18 05:20:52,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:20:52,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919781172] [2022-01-18 05:20:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:20:52,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:20:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:20:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:52,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:20:52,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919781172] [2022-01-18 05:20:52,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919781172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:20:52,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:20:52,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:20:52,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929827495] [2022-01-18 05:20:52,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:20:52,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:20:52,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:20:52,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:20:52,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:20:52,792 INFO L87 Difference]: Start difference. First operand 8742 states and 40161 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:52,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:20:52,922 INFO L93 Difference]: Finished difference Result 15516 states and 70047 transitions. [2022-01-18 05:20:52,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:20:52,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 05:20:52,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:20:52,968 INFO L225 Difference]: With dead ends: 15516 [2022-01-18 05:20:52,968 INFO L226 Difference]: Without dead ends: 15386 [2022-01-18 05:20:52,968 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 [2022-01-18 05:20:52,969 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 89 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:20:52,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 79 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:20:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15386 states. [2022-01-18 05:20:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15386 to 12424. [2022-01-18 05:20:53,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 4.582065523625533) internal successors, (56923), 12423 states have internal predecessors, (56923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 56923 transitions. [2022-01-18 05:20:53,399 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 56923 transitions. Word has length 30 [2022-01-18 05:20:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:20:53,399 INFO L470 AbstractCegarLoop]: Abstraction has 12424 states and 56923 transitions. [2022-01-18 05:20:53,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:53,399 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 56923 transitions. [2022-01-18 05:20:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 05:20:53,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:20:53,431 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:20:53,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 05:20:53,432 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:20:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:20:53,432 INFO L85 PathProgramCache]: Analyzing trace with hash 895564249, now seen corresponding path program 1 times [2022-01-18 05:20:53,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:20:53,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171918141] [2022-01-18 05:20:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:20:53,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:20:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:20:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:53,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:20:53,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171918141] [2022-01-18 05:20:53,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171918141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:20:53,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:20:53,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:20:53,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089822918] [2022-01-18 05:20:53,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:20:53,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:20:53,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:20:53,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:20:53,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:20:53,474 INFO L87 Difference]: Start difference. First operand 12424 states and 56923 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:53,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:20:53,817 INFO L93 Difference]: Finished difference Result 22857 states and 102629 transitions. [2022-01-18 05:20:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:20:53,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 05:20:53,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:20:53,926 INFO L225 Difference]: With dead ends: 22857 [2022-01-18 05:20:53,926 INFO L226 Difference]: Without dead ends: 22667 [2022-01-18 05:20:53,926 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 [2022-01-18 05:20:53,927 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 81 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:20:53,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 79 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:20:53,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22667 states. [2022-01-18 05:20:54,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22667 to 18333. [2022-01-18 05:20:54,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18333 states, 18332 states have (on average 4.602280165830242) internal successors, (84369), 18332 states have internal predecessors, (84369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 84369 transitions. [2022-01-18 05:20:54,459 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 84369 transitions. Word has length 30 [2022-01-18 05:20:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:20:54,460 INFO L470 AbstractCegarLoop]: Abstraction has 18333 states and 84369 transitions. [2022-01-18 05:20:54,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:54,460 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 84369 transitions. [2022-01-18 05:20:54,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 05:20:54,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:20:54,722 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:20:54,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-18 05:20:54,723 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:20:54,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:20:54,723 INFO L85 PathProgramCache]: Analyzing trace with hash -667683816, now seen corresponding path program 2 times [2022-01-18 05:20:54,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:20:54,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206955276] [2022-01-18 05:20:54,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:20:54,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:20:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:20:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:54,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:20:54,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206955276] [2022-01-18 05:20:54,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206955276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:20:54,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136853143] [2022-01-18 05:20:54,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:20:54,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:20:54,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:20:54,783 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:20:54,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 05:20:54,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:20:54,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:20:54,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 05:20:54,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:20:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:54,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:20:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:54,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136853143] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:20:54,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:20:54,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 8 [2022-01-18 05:20:54,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255873270] [2022-01-18 05:20:54,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:20:54,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 05:20:54,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:20:54,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 05:20:54,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:20:54,916 INFO L87 Difference]: Start difference. First operand 18333 states and 84369 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:56,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:20:56,167 INFO L93 Difference]: Finished difference Result 64631 states and 282480 transitions. [2022-01-18 05:20:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 05:20:56,167 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 05:20:56,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:20:56,660 INFO L225 Difference]: With dead ends: 64631 [2022-01-18 05:20:56,660 INFO L226 Difference]: Without dead ends: 50671 [2022-01-18 05:20:56,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 05:20:56,661 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 496 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:20:56,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 497 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:20:56,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50671 states. [2022-01-18 05:20:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50671 to 22433. [2022-01-18 05:20:57,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22433 states, 22432 states have (on average 4.573511055634808) internal successors, (102593), 22432 states have internal predecessors, (102593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22433 states to 22433 states and 102593 transitions. [2022-01-18 05:20:57,665 INFO L78 Accepts]: Start accepts. Automaton has 22433 states and 102593 transitions. Word has length 30 [2022-01-18 05:20:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:20:57,665 INFO L470 AbstractCegarLoop]: Abstraction has 22433 states and 102593 transitions. [2022-01-18 05:20:57,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:57,665 INFO L276 IsEmpty]: Start isEmpty. Operand 22433 states and 102593 transitions. [2022-01-18 05:20:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 05:20:57,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:20:57,717 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:20:57,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 05:20:57,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:20:57,933 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:20:57,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:20:57,934 INFO L85 PathProgramCache]: Analyzing trace with hash 990425401, now seen corresponding path program 2 times [2022-01-18 05:20:57,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:20:57,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415977729] [2022-01-18 05:20:57,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:20:57,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:20:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:20:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:57,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:20:57,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415977729] [2022-01-18 05:20:57,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415977729] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:20:57,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:20:57,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:20:57,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629473251] [2022-01-18 05:20:57,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:20:57,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:20:57,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:20:57,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:20:57,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:20:57,970 INFO L87 Difference]: Start difference. First operand 22433 states and 102593 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:20:58,176 INFO L93 Difference]: Finished difference Result 27166 states and 122184 transitions. [2022-01-18 05:20:58,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:20:58,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 05:20:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:20:58,286 INFO L225 Difference]: With dead ends: 27166 [2022-01-18 05:20:58,286 INFO L226 Difference]: Without dead ends: 26834 [2022-01-18 05:20:58,287 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 [2022-01-18 05:20:58,287 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 86 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:20:58,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 83 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:20:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26834 states. [2022-01-18 05:20:59,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26834 to 22633. [2022-01-18 05:20:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22633 states, 22632 states have (on average 4.55218275008837) internal successors, (103025), 22632 states have internal predecessors, (103025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:59,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22633 states to 22633 states and 103025 transitions. [2022-01-18 05:20:59,257 INFO L78 Accepts]: Start accepts. Automaton has 22633 states and 103025 transitions. Word has length 30 [2022-01-18 05:20:59,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:20:59,257 INFO L470 AbstractCegarLoop]: Abstraction has 22633 states and 103025 transitions. [2022-01-18 05:20:59,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:59,257 INFO L276 IsEmpty]: Start isEmpty. Operand 22633 states and 103025 transitions. [2022-01-18 05:20:59,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 05:20:59,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:20:59,311 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:20:59,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-18 05:20:59,311 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:20:59,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:20:59,312 INFO L85 PathProgramCache]: Analyzing trace with hash 781962112, now seen corresponding path program 2 times [2022-01-18 05:20:59,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:20:59,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310229217] [2022-01-18 05:20:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:20:59,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:20:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:20:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:20:59,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:20:59,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310229217] [2022-01-18 05:20:59,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310229217] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:20:59,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:20:59,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:20:59,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189621059] [2022-01-18 05:20:59,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:20:59,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:20:59,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:20:59,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:20:59,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:20:59,332 INFO L87 Difference]: Start difference. First operand 22633 states and 103025 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:20:59,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:20:59,522 INFO L93 Difference]: Finished difference Result 24325 states and 108741 transitions. [2022-01-18 05:20:59,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 05:20:59,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 05:20:59,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:20:59,895 INFO L225 Difference]: With dead ends: 24325 [2022-01-18 05:20:59,895 INFO L226 Difference]: Without dead ends: 24325 [2022-01-18 05:20:59,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:20:59,896 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 53 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:20:59,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 71 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:20:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24325 states. [2022-01-18 05:21:00,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24325 to 21261. [2022-01-18 05:21:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21261 states, 21260 states have (on average 4.549952963311383) internal successors, (96732), 21260 states have internal predecessors, (96732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 96732 transitions. [2022-01-18 05:21:00,484 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 96732 transitions. Word has length 30 [2022-01-18 05:21:00,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:21:00,484 INFO L470 AbstractCegarLoop]: Abstraction has 21261 states and 96732 transitions. [2022-01-18 05:21:00,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:00,484 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 96732 transitions. [2022-01-18 05:21:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 05:21:00,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:21:00,529 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:21:00,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 05:21:00,530 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:21:00,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:21:00,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2141067490, now seen corresponding path program 3 times [2022-01-18 05:21:00,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:21:00,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357805404] [2022-01-18 05:21:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:00,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:21:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:21:00,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:21:00,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357805404] [2022-01-18 05:21:00,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357805404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:21:00,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:21:00,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 05:21:00,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006047120] [2022-01-18 05:21:00,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:21:00,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:21:00,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:21:00,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:21:00,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:21:00,553 INFO L87 Difference]: Start difference. First operand 21261 states and 96732 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:01,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:21:01,013 INFO L93 Difference]: Finished difference Result 22070 states and 97895 transitions. [2022-01-18 05:21:01,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:21:01,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 05:21:01,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:21:01,091 INFO L225 Difference]: With dead ends: 22070 [2022-01-18 05:21:01,091 INFO L226 Difference]: Without dead ends: 19364 [2022-01-18 05:21:01,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:21:01,092 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 100 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:21:01,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 76 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:21:01,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19364 states. [2022-01-18 05:21:01,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19364 to 13869. [2022-01-18 05:21:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13869 states, 13868 states have (on average 4.429838477069513) internal successors, (61433), 13868 states have internal predecessors, (61433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:01,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13869 states to 13869 states and 61433 transitions. [2022-01-18 05:21:01,477 INFO L78 Accepts]: Start accepts. Automaton has 13869 states and 61433 transitions. Word has length 30 [2022-01-18 05:21:01,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:21:01,477 INFO L470 AbstractCegarLoop]: Abstraction has 13869 states and 61433 transitions. [2022-01-18 05:21:01,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 13869 states and 61433 transitions. [2022-01-18 05:21:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 05:21:01,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:21:01,510 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:21:01,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-18 05:21:01,510 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:21:01,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:21:01,512 INFO L85 PathProgramCache]: Analyzing trace with hash 169041953, now seen corresponding path program 2 times [2022-01-18 05:21:01,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:21:01,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870298957] [2022-01-18 05:21:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:01,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:21:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:21:01,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:21:01,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870298957] [2022-01-18 05:21:01,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870298957] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:21:01,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:21:01,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:21:01,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311531135] [2022-01-18 05:21:01,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:21:01,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:21:01,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:21:01,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:21:01,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:21:01,543 INFO L87 Difference]: Start difference. First operand 13869 states and 61433 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:01,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:21:01,743 INFO L93 Difference]: Finished difference Result 20880 states and 90831 transitions. [2022-01-18 05:21:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:21:01,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 05:21:01,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:21:01,815 INFO L225 Difference]: With dead ends: 20880 [2022-01-18 05:21:01,815 INFO L226 Difference]: Without dead ends: 20521 [2022-01-18 05:21:01,816 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 [2022-01-18 05:21:01,817 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 82 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:21:01,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 81 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:21:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20521 states. [2022-01-18 05:21:02,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20521 to 15337. [2022-01-18 05:21:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15337 states, 15336 states have (on average 4.414906103286385) internal successors, (67707), 15336 states have internal predecessors, (67707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15337 states to 15337 states and 67707 transitions. [2022-01-18 05:21:02,433 INFO L78 Accepts]: Start accepts. Automaton has 15337 states and 67707 transitions. Word has length 30 [2022-01-18 05:21:02,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:21:02,434 INFO L470 AbstractCegarLoop]: Abstraction has 15337 states and 67707 transitions. [2022-01-18 05:21:02,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 15337 states and 67707 transitions. [2022-01-18 05:21:02,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 05:21:02,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:21:02,468 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:21:02,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-18 05:21:02,468 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:21:02,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:21:02,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1432170691, now seen corresponding path program 3 times [2022-01-18 05:21:02,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:21:02,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363852835] [2022-01-18 05:21:02,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:02,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:21:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:21:02,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:21:02,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363852835] [2022-01-18 05:21:02,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363852835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:21:02,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:21:02,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 05:21:02,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141443776] [2022-01-18 05:21:02,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:21:02,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 05:21:02,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:21:02,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 05:21:02,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:21:02,522 INFO L87 Difference]: Start difference. First operand 15337 states and 67707 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:02,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:21:02,679 INFO L93 Difference]: Finished difference Result 19356 states and 85625 transitions. [2022-01-18 05:21:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:21:02,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 05:21:02,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:21:02,733 INFO L225 Difference]: With dead ends: 19356 [2022-01-18 05:21:02,733 INFO L226 Difference]: Without dead ends: 17254 [2022-01-18 05:21:02,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 05:21:02,734 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 74 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:21:02,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 101 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:21:02,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17254 states. [2022-01-18 05:21:03,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17254 to 13238. [2022-01-18 05:21:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13238 states, 13237 states have (on average 4.481755684822845) internal successors, (59325), 13237 states have internal predecessors, (59325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13238 states to 13238 states and 59325 transitions. [2022-01-18 05:21:03,262 INFO L78 Accepts]: Start accepts. Automaton has 13238 states and 59325 transitions. Word has length 30 [2022-01-18 05:21:03,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:21:03,262 INFO L470 AbstractCegarLoop]: Abstraction has 13238 states and 59325 transitions. [2022-01-18 05:21:03,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 13238 states and 59325 transitions. [2022-01-18 05:21:03,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 05:21:03,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:21:03,299 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:21:03,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-18 05:21:03,300 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:21:03,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:21:03,300 INFO L85 PathProgramCache]: Analyzing trace with hash -576259964, now seen corresponding path program 3 times [2022-01-18 05:21:03,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:21:03,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040773612] [2022-01-18 05:21:03,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:03,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:21:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:21:03,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:21:03,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040773612] [2022-01-18 05:21:03,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040773612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 05:21:03,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 05:21:03,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 05:21:03,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383178549] [2022-01-18 05:21:03,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:21:03,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 05:21:03,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:21:03,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 05:21:03,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 05:21:03,320 INFO L87 Difference]: Start difference. First operand 13238 states and 59325 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:21:03,480 INFO L93 Difference]: Finished difference Result 14893 states and 67180 transitions. [2022-01-18 05:21:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 05:21:03,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 05:21:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:21:03,529 INFO L225 Difference]: With dead ends: 14893 [2022-01-18 05:21:03,529 INFO L226 Difference]: Without dead ends: 13819 [2022-01-18 05:21:03,531 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 [2022-01-18 05:21:03,531 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 63 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 05:21:03,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 82 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 05:21:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13819 states. [2022-01-18 05:21:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13819 to 10861. [2022-01-18 05:21:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10861 states, 10860 states have (on average 4.560865561694291) internal successors, (49531), 10860 states have internal predecessors, (49531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:03,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 49531 transitions. [2022-01-18 05:21:03,821 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 49531 transitions. Word has length 30 [2022-01-18 05:21:03,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:21:03,821 INFO L470 AbstractCegarLoop]: Abstraction has 10861 states and 49531 transitions. [2022-01-18 05:21:03,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:03,821 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 49531 transitions. [2022-01-18 05:21:03,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-18 05:21:03,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:21:03,843 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:21:03,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-18 05:21:03,844 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:21:03,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:21:03,844 INFO L85 PathProgramCache]: Analyzing trace with hash 805676669, now seen corresponding path program 1 times [2022-01-18 05:21:03,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:21:03,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403558362] [2022-01-18 05:21:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:03,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:21:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:03,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:21:03,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403558362] [2022-01-18 05:21:03,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403558362] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:21:03,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150440423] [2022-01-18 05:21:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:03,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:21:03,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:21:03,877 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:21:03,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 05:21:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:03,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 05:21:03,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:21:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:04,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:21:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:04,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150440423] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:21:04,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:21:04,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-18 05:21:04,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433153432] [2022-01-18 05:21:04,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:21:04,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 05:21:04,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:21:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 05:21:04,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:21:04,084 INFO L87 Difference]: Start difference. First operand 10861 states and 49531 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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) [2022-01-18 05:21:04,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:21:04,316 INFO L93 Difference]: Finished difference Result 16083 states and 73635 transitions. [2022-01-18 05:21:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 05:21:04,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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 36 [2022-01-18 05:21:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:21:04,390 INFO L225 Difference]: With dead ends: 16083 [2022-01-18 05:21:04,390 INFO L226 Difference]: Without dead ends: 16083 [2022-01-18 05:21:04,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:21:04,391 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 75 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:21:04,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 128 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:21:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16083 states. [2022-01-18 05:21:04,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16083 to 11321. [2022-01-18 05:21:04,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11321 states, 11320 states have (on average 4.567667844522968) internal successors, (51706), 11320 states have internal predecessors, (51706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11321 states to 11321 states and 51706 transitions. [2022-01-18 05:21:04,786 INFO L78 Accepts]: Start accepts. Automaton has 11321 states and 51706 transitions. Word has length 36 [2022-01-18 05:21:04,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:21:04,786 INFO L470 AbstractCegarLoop]: Abstraction has 11321 states and 51706 transitions. [2022-01-18 05:21:04,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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) [2022-01-18 05:21:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 11321 states and 51706 transitions. [2022-01-18 05:21:04,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 05:21:04,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:21:04,807 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:21:04,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 05:21:05,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 05:21:05,015 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:21:05,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:21:05,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1566380201, now seen corresponding path program 1 times [2022-01-18 05:21:05,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:21:05,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716484491] [2022-01-18 05:21:05,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:05,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:21:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:05,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:21:05,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716484491] [2022-01-18 05:21:05,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716484491] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:21:05,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559391662] [2022-01-18 05:21:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:05,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:21:05,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:21:05,154 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:21:05,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 05:21:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:05,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 05:21:05,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:21:05,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:21:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:05,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:21:05,687 INFO L353 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-01-18 05:21:05,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2022-01-18 05:21:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:05,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559391662] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 05:21:05,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 05:21:05,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 14 [2022-01-18 05:21:05,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797093164] [2022-01-18 05:21:05,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:21:05,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 05:21:05,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:21:05,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 05:21:05,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:21:05,690 INFO L87 Difference]: Start difference. First operand 11321 states and 51706 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:06,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:21:06,018 INFO L93 Difference]: Finished difference Result 32605 states and 149800 transitions. [2022-01-18 05:21:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:21:06,018 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 05:21:06,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:21:06,099 INFO L225 Difference]: With dead ends: 32605 [2022-01-18 05:21:06,099 INFO L226 Difference]: Without dead ends: 24592 [2022-01-18 05:21:06,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-01-18 05:21:06,100 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 169 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:21:06,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 236 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:21:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24592 states. [2022-01-18 05:21:06,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24592 to 12486. [2022-01-18 05:21:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12486 states, 12485 states have (on average 4.529034841810172) internal successors, (56545), 12485 states have internal predecessors, (56545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12486 states to 12486 states and 56545 transitions. [2022-01-18 05:21:06,585 INFO L78 Accepts]: Start accepts. Automaton has 12486 states and 56545 transitions. Word has length 39 [2022-01-18 05:21:06,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:21:06,585 INFO L470 AbstractCegarLoop]: Abstraction has 12486 states and 56545 transitions. [2022-01-18 05:21:06,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 12486 states and 56545 transitions. [2022-01-18 05:21:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 05:21:06,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:21:06,618 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:21:06,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 05:21:06,839 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,SelfDestructingSolverStorable16 [2022-01-18 05:21:06,839 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:21:06,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:21:06,840 INFO L85 PathProgramCache]: Analyzing trace with hash -386488123, now seen corresponding path program 2 times [2022-01-18 05:21:06,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:21:06,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829824820] [2022-01-18 05:21:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:06,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:21:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:06,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:21:06,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829824820] [2022-01-18 05:21:06,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829824820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:21:06,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100602750] [2022-01-18 05:21:06,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:21:06,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:21:06,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:21:06,889 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:21:06,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 05:21:06,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:21:06,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:21:06,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 05:21:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:21:07,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:21:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:21:07,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:21:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:07,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100602750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:21:07,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:21:07,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2022-01-18 05:21:07,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89303405] [2022-01-18 05:21:07,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:21:07,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 05:21:07,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:21:07,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 05:21:07,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-01-18 05:21:07,237 INFO L87 Difference]: Start difference. First operand 12486 states and 56545 transitions. Second operand has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:21:08,925 INFO L93 Difference]: Finished difference Result 93192 states and 432040 transitions. [2022-01-18 05:21:08,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 05:21:08,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 05:21:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:21:09,133 INFO L225 Difference]: With dead ends: 93192 [2022-01-18 05:21:09,134 INFO L226 Difference]: Without dead ends: 37625 [2022-01-18 05:21:09,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=882, Invalid=2658, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 05:21:09,135 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 666 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:21:09,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 882 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:21:09,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37625 states. [2022-01-18 05:21:09,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37625 to 10022. [2022-01-18 05:21:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10022 states, 10021 states have (on average 4.513421814190201) internal successors, (45229), 10021 states have internal predecessors, (45229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 45229 transitions. [2022-01-18 05:21:09,576 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 45229 transitions. Word has length 39 [2022-01-18 05:21:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:21:09,577 INFO L470 AbstractCegarLoop]: Abstraction has 10022 states and 45229 transitions. [2022-01-18 05:21:09,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.785714285714286) internal successors, (81), 14 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 45229 transitions. [2022-01-18 05:21:09,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 05:21:09,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:21:09,596 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:21:09,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 05:21:09,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 05:21:09,804 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:21:09,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:21:09,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1386302531, now seen corresponding path program 3 times [2022-01-18 05:21:09,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:21:09,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885440553] [2022-01-18 05:21:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:09,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:21:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:10,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:21:10,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885440553] [2022-01-18 05:21:10,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885440553] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:21:10,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795526268] [2022-01-18 05:21:10,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:21:10,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:21:10,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:21:10,181 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:21:10,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 05:21:10,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 05:21:10,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:21:10,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 05:21:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:21:10,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:21:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:10,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:21:10,694 INFO L353 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-01-18 05:21:10,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 1 [2022-01-18 05:21:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:10,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795526268] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-18 05:21:10,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-18 05:21:10,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2022-01-18 05:21:10,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828566485] [2022-01-18 05:21:10,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 05:21:10,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 05:21:10,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:21:10,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 05:21:10,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-01-18 05:21:10,701 INFO L87 Difference]: Start difference. First operand 10022 states and 45229 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:11,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:21:11,139 INFO L93 Difference]: Finished difference Result 24835 states and 113521 transitions. [2022-01-18 05:21:11,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 05:21:11,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 05:21:11,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:21:11,214 INFO L225 Difference]: With dead ends: 24835 [2022-01-18 05:21:11,215 INFO L226 Difference]: Without dead ends: 20239 [2022-01-18 05:21:11,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2022-01-18 05:21:11,215 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 162 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:21:11,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 252 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:21:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20239 states. [2022-01-18 05:21:11,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20239 to 11948. [2022-01-18 05:21:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11948 states, 11947 states have (on average 4.500544069640914) internal successors, (53768), 11947 states have internal predecessors, (53768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11948 states to 11948 states and 53768 transitions. [2022-01-18 05:21:11,594 INFO L78 Accepts]: Start accepts. Automaton has 11948 states and 53768 transitions. Word has length 39 [2022-01-18 05:21:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:21:11,594 INFO L470 AbstractCegarLoop]: Abstraction has 11948 states and 53768 transitions. [2022-01-18 05:21:11,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 11948 states and 53768 transitions. [2022-01-18 05:21:11,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-18 05:21:11,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:21:11,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:21:11,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-18 05:21:11,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:21:11,834 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:21:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:21:11,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1728772687, now seen corresponding path program 4 times [2022-01-18 05:21:11,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:21:11,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696765505] [2022-01-18 05:21:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:11,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:21:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:11,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:21:11,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696765505] [2022-01-18 05:21:11,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696765505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:21:11,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519112186] [2022-01-18 05:21:11,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:21:11,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:21:11,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:21:11,890 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:21:11,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 05:21:11,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:21:11,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:21:11,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 05:21:11,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:21:11,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 05:21:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:12,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:21:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:12,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519112186] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:21:12,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:21:12,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-01-18 05:21:12,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176067669] [2022-01-18 05:21:12,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:21:12,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 05:21:12,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:21:12,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 05:21:12,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-01-18 05:21:12,175 INFO L87 Difference]: Start difference. First operand 11948 states and 53768 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:13,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:21:13,456 INFO L93 Difference]: Finished difference Result 76536 states and 352452 transitions. [2022-01-18 05:21:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 05:21:13,456 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-18 05:21:13,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:21:13,596 INFO L225 Difference]: With dead ends: 76536 [2022-01-18 05:21:13,597 INFO L226 Difference]: Without dead ends: 31652 [2022-01-18 05:21:13,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=367, Invalid=823, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 05:21:13,599 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 669 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:21:13,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 569 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:21:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31652 states. [2022-01-18 05:21:14,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31652 to 10999. [2022-01-18 05:21:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10999 states, 10998 states have (on average 4.478268776141117) internal successors, (49252), 10998 states have internal predecessors, (49252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10999 states to 10999 states and 49252 transitions. [2022-01-18 05:21:14,482 INFO L78 Accepts]: Start accepts. Automaton has 10999 states and 49252 transitions. Word has length 39 [2022-01-18 05:21:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:21:14,482 INFO L470 AbstractCegarLoop]: Abstraction has 10999 states and 49252 transitions. [2022-01-18 05:21:14,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 10999 states and 49252 transitions. [2022-01-18 05:21:14,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 05:21:14,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:21:14,512 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:21:14,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 05:21:14,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:21:14,726 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:21:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:21:14,726 INFO L85 PathProgramCache]: Analyzing trace with hash -515310098, now seen corresponding path program 5 times [2022-01-18 05:21:14,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:21:14,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998550559] [2022-01-18 05:21:14,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:14,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:21:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:14,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:21:14,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998550559] [2022-01-18 05:21:14,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998550559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:21:14,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447146421] [2022-01-18 05:21:14,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:21:14,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:21:14,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:21:14,796 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:21:14,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 05:21:14,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 05:21:14,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:21:14,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 05:21:14,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:21:14,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:14,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:21:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:15,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447146421] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:21:15,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:21:15,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 05:21:15,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720932932] [2022-01-18 05:21:15,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:21:15,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 05:21:15,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:21:15,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 05:21:15,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:21:15,007 INFO L87 Difference]: Start difference. First operand 10999 states and 49252 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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) [2022-01-18 05:21:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:21:15,231 INFO L93 Difference]: Finished difference Result 24323 states and 109383 transitions. [2022-01-18 05:21:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:21:15,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 42 [2022-01-18 05:21:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:21:15,305 INFO L225 Difference]: With dead ends: 24323 [2022-01-18 05:21:15,305 INFO L226 Difference]: Without dead ends: 24067 [2022-01-18 05:21:15,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:21:15,307 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 206 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:21:15,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 177 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:21:15,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24067 states. [2022-01-18 05:21:15,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24067 to 17699. [2022-01-18 05:21:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17699 states, 17698 states have (on average 4.6157192903152895) internal successors, (81689), 17698 states have internal predecessors, (81689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17699 states to 17699 states and 81689 transitions. [2022-01-18 05:21:16,265 INFO L78 Accepts]: Start accepts. Automaton has 17699 states and 81689 transitions. Word has length 42 [2022-01-18 05:21:16,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:21:16,265 INFO L470 AbstractCegarLoop]: Abstraction has 17699 states and 81689 transitions. [2022-01-18 05:21:16,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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) [2022-01-18 05:21:16,265 INFO L276 IsEmpty]: Start isEmpty. Operand 17699 states and 81689 transitions. [2022-01-18 05:21:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 05:21:16,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:21:16,327 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:21:16,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 05:21:16,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:21:16,543 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:21:16,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:21:16,543 INFO L85 PathProgramCache]: Analyzing trace with hash -110682124, now seen corresponding path program 6 times [2022-01-18 05:21:16,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:21:16,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995679699] [2022-01-18 05:21:16,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:16,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:21:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:16,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:21:16,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995679699] [2022-01-18 05:21:16,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995679699] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:21:16,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656984552] [2022-01-18 05:21:16,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:21:16,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:21:16,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:21:16,605 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:21:16,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 05:21:16,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 05:21:16,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:21:16,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:21:16,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:21:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:21:16,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:21:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:21:16,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656984552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:21:16,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:21:16,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-18 05:21:16,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098242010] [2022-01-18 05:21:16,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:21:16,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:21:16,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:21:16,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:21:16,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:21:16,835 INFO L87 Difference]: Start difference. First operand 17699 states and 81689 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:18,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:21:18,023 INFO L93 Difference]: Finished difference Result 74693 states and 330550 transitions. [2022-01-18 05:21:18,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 05:21:18,023 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 05:21:18,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:21:18,366 INFO L225 Difference]: With dead ends: 74693 [2022-01-18 05:21:18,366 INFO L226 Difference]: Without dead ends: 74693 [2022-01-18 05:21:18,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:21:18,368 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1067 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:21:18,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1067 Valid, 384 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:21:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74693 states. [2022-01-18 05:21:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74693 to 33164. [2022-01-18 05:21:20,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33164 states, 33163 states have (on average 4.697584657600338) internal successors, (155786), 33163 states have internal predecessors, (155786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33164 states to 33164 states and 155786 transitions. [2022-01-18 05:21:20,400 INFO L78 Accepts]: Start accepts. Automaton has 33164 states and 155786 transitions. Word has length 42 [2022-01-18 05:21:20,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:21:20,400 INFO L470 AbstractCegarLoop]: Abstraction has 33164 states and 155786 transitions. [2022-01-18 05:21:20,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:20,401 INFO L276 IsEmpty]: Start isEmpty. Operand 33164 states and 155786 transitions. [2022-01-18 05:21:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 05:21:20,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:21:20,480 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:21:20,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 05:21:20,695 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,SelfDestructingSolverStorable21 [2022-01-18 05:21:20,695 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:21:20,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:21:20,696 INFO L85 PathProgramCache]: Analyzing trace with hash -526915678, now seen corresponding path program 7 times [2022-01-18 05:21:20,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:21:20,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880378797] [2022-01-18 05:21:20,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:20,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:21:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:20,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:21:20,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880378797] [2022-01-18 05:21:20,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880378797] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:21:20,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052209020] [2022-01-18 05:21:20,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 05:21:20,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:21:20,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:21:20,736 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:21:20,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 05:21:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:20,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 05:21:20,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:21:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:21:20,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:21:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-18 05:21:20,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052209020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:21:20,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:21:20,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 05:21:20,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554844882] [2022-01-18 05:21:20,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:21:20,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 05:21:20,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:21:20,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 05:21:20,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 05:21:20,895 INFO L87 Difference]: Start difference. First operand 33164 states and 155786 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 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) [2022-01-18 05:21:21,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:21:21,313 INFO L93 Difference]: Finished difference Result 52248 states and 243668 transitions. [2022-01-18 05:21:21,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 05:21:21,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 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 42 [2022-01-18 05:21:21,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:21:21,871 INFO L225 Difference]: With dead ends: 52248 [2022-01-18 05:21:21,871 INFO L226 Difference]: Without dead ends: 52183 [2022-01-18 05:21:21,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 05:21:21,872 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 141 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:21:21,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 172 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:21:21,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52183 states. [2022-01-18 05:21:23,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52183 to 42570. [2022-01-18 05:21:23,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42570 states, 42569 states have (on average 4.768657943573962) internal successors, (202997), 42569 states have internal predecessors, (202997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:23,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42570 states to 42570 states and 202997 transitions. [2022-01-18 05:21:23,351 INFO L78 Accepts]: Start accepts. Automaton has 42570 states and 202997 transitions. Word has length 42 [2022-01-18 05:21:23,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:21:23,351 INFO L470 AbstractCegarLoop]: Abstraction has 42570 states and 202997 transitions. [2022-01-18 05:21:23,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 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) [2022-01-18 05:21:23,351 INFO L276 IsEmpty]: Start isEmpty. Operand 42570 states and 202997 transitions. [2022-01-18 05:21:23,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 05:21:23,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:21:23,449 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:21:23,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-18 05:21:23,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 05:21:23,664 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:21:23,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:21:23,664 INFO L85 PathProgramCache]: Analyzing trace with hash -713455420, now seen corresponding path program 8 times [2022-01-18 05:21:23,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:21:23,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356724591] [2022-01-18 05:21:23,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:23,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:21:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:21:23,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:21:23,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356724591] [2022-01-18 05:21:23,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356724591] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:21:23,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859808873] [2022-01-18 05:21:23,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 05:21:23,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:21:23,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:21:23,722 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:21:23,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 05:21:23,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 05:21:23,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:21:23,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:21:23,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:21:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:21:23,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:21:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:21:23,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859808873] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:21:23,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:21:23,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-18 05:21:23,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115235637] [2022-01-18 05:21:23,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:21:23,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 05:21:23,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:21:23,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 05:21:23,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 05:21:23,892 INFO L87 Difference]: Start difference. First operand 42570 states and 202997 transitions. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:26,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:21:26,029 INFO L93 Difference]: Finished difference Result 107257 states and 509603 transitions. [2022-01-18 05:21:26,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 05:21:26,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 05:21:26,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:21:26,536 INFO L225 Difference]: With dead ends: 107257 [2022-01-18 05:21:26,536 INFO L226 Difference]: Without dead ends: 106805 [2022-01-18 05:21:26,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=497, Invalid=1665, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 05:21:26,537 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 663 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:21:26,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 444 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:21:26,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106805 states. [2022-01-18 05:21:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106805 to 70295. [2022-01-18 05:21:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70295 states, 70294 states have (on average 4.982217543460324) internal successors, (350220), 70294 states have internal predecessors, (350220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70295 states to 70295 states and 350220 transitions. [2022-01-18 05:21:29,839 INFO L78 Accepts]: Start accepts. Automaton has 70295 states and 350220 transitions. Word has length 42 [2022-01-18 05:21:29,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:21:29,839 INFO L470 AbstractCegarLoop]: Abstraction has 70295 states and 350220 transitions. [2022-01-18 05:21:29,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:29,839 INFO L276 IsEmpty]: Start isEmpty. Operand 70295 states and 350220 transitions. [2022-01-18 05:21:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 05:21:30,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:21:30,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:21:30,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 05:21:30,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 05:21:30,823 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:21:30,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:21:30,824 INFO L85 PathProgramCache]: Analyzing trace with hash -399095643, now seen corresponding path program 9 times [2022-01-18 05:21:30,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:21:30,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355797202] [2022-01-18 05:21:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:30,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:21:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:21:30,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:21:30,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355797202] [2022-01-18 05:21:30,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355797202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:21:30,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811580322] [2022-01-18 05:21:30,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 05:21:30,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:21:30,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:21:30,894 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:21:30,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 05:21:30,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 05:21:30,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:21:30,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:21:30,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:21:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:31,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:21:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:21:31,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811580322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:21:31,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:21:31,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-01-18 05:21:31,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414941015] [2022-01-18 05:21:31,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:21:31,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 05:21:31,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:21:31,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 05:21:31,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:21:31,113 INFO L87 Difference]: Start difference. First operand 70295 states and 350220 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:21:33,404 INFO L93 Difference]: Finished difference Result 174263 states and 874545 transitions. [2022-01-18 05:21:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 05:21:33,404 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 05:21:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:21:35,066 INFO L225 Difference]: With dead ends: 174263 [2022-01-18 05:21:35,067 INFO L226 Difference]: Without dead ends: 168028 [2022-01-18 05:21:35,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-18 05:21:35,067 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 226 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:21:35,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 179 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:21:35,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168028 states. [2022-01-18 05:21:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168028 to 143474. [2022-01-18 05:21:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143474 states, 143473 states have (on average 5.12727133328222) internal successors, (735625), 143473 states have internal predecessors, (735625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143474 states to 143474 states and 735625 transitions. [2022-01-18 05:21:41,730 INFO L78 Accepts]: Start accepts. Automaton has 143474 states and 735625 transitions. Word has length 42 [2022-01-18 05:21:41,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:21:41,730 INFO L470 AbstractCegarLoop]: Abstraction has 143474 states and 735625 transitions. [2022-01-18 05:21:41,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:21:41,730 INFO L276 IsEmpty]: Start isEmpty. Operand 143474 states and 735625 transitions. [2022-01-18 05:21:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 05:21:42,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:21:42,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:21:42,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 05:21:42,530 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,SelfDestructingSolverStorable24 [2022-01-18 05:21:42,530 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:21:42,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:21:42,530 INFO L85 PathProgramCache]: Analyzing trace with hash 62522503, now seen corresponding path program 10 times [2022-01-18 05:21:42,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:21:42,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903076523] [2022-01-18 05:21:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:21:42,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:21:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:21:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:21:42,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:21:42,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903076523] [2022-01-18 05:21:42,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903076523] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:21:42,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605798327] [2022-01-18 05:21:42,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 05:21:42,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:21:42,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:21:42,567 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:21:42,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 05:21:42,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 05:21:42,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:21:42,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:21:42,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:21:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:21:42,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:21:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 05:21:42,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605798327] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:21:42,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:21:42,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 05:21:42,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530621353] [2022-01-18 05:21:42,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:21:42,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 05:21:42,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:21:42,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 05:21:42,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 05:21:42,741 INFO L87 Difference]: Start difference. First operand 143474 states and 735625 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 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) [2022-01-18 05:21:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:21:46,600 INFO L93 Difference]: Finished difference Result 297547 states and 1523207 transitions. [2022-01-18 05:21:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 05:21:46,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 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 42 [2022-01-18 05:21:46,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:21:50,036 INFO L225 Difference]: With dead ends: 297547 [2022-01-18 05:21:50,036 INFO L226 Difference]: Without dead ends: 296835 [2022-01-18 05:21:50,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:21:50,037 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 290 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 05:21:50,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 180 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 05:21:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296835 states. [2022-01-18 05:22:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296835 to 258515. [2022-01-18 05:22:01,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258515 states, 258514 states have (on average 5.225949078193057) internal successors, (1350981), 258514 states have internal predecessors, (1350981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:22:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258515 states to 258515 states and 1350981 transitions. [2022-01-18 05:22:04,901 INFO L78 Accepts]: Start accepts. Automaton has 258515 states and 1350981 transitions. Word has length 42 [2022-01-18 05:22:04,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:22:04,901 INFO L470 AbstractCegarLoop]: Abstraction has 258515 states and 1350981 transitions. [2022-01-18 05:22:04,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 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) [2022-01-18 05:22:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 258515 states and 1350981 transitions. [2022-01-18 05:22:06,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-18 05:22:06,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:22:06,308 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:22:06,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 05:22:06,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:22:06,517 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:22:06,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:22:06,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1204816665, now seen corresponding path program 11 times [2022-01-18 05:22:06,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:22:06,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283059345] [2022-01-18 05:22:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:22:06,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:22:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:22:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:22:06,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:22:06,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283059345] [2022-01-18 05:22:06,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283059345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:22:06,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838952050] [2022-01-18 05:22:06,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 05:22:06,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:22:06,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:22:06,574 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:22:06,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 05:22:06,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 05:22:06,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:22:06,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 05:22:06,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:22:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:22:06,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:22:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 05:22:06,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838952050] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:22:06,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:22:06,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-18 05:22:06,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569189728] [2022-01-18 05:22:06,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:22:06,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 05:22:06,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:22:06,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 05:22:06,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 05:22:06,788 INFO L87 Difference]: Start difference. First operand 258515 states and 1350981 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:22:21,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:22:21,981 INFO L93 Difference]: Finished difference Result 802584 states and 4025386 transitions. [2022-01-18 05:22:21,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 05:22:21,982 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-18 05:22:21,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:22:30,394 INFO L225 Difference]: With dead ends: 802584 [2022-01-18 05:22:30,394 INFO L226 Difference]: Without dead ends: 797264 [2022-01-18 05:22:30,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 05:22:30,395 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 718 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 05:22:30,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 473 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 05:22:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797264 states. [2022-01-18 05:23:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797264 to 517584. [2022-01-18 05:23:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517584 states, 517583 states have (on average 5.221176120544918) internal successors, (2702392), 517583 states have internal predecessors, (2702392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:23:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517584 states to 517584 states and 2702392 transitions. [2022-01-18 05:23:12,850 INFO L78 Accepts]: Start accepts. Automaton has 517584 states and 2702392 transitions. Word has length 42 [2022-01-18 05:23:12,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 05:23:12,850 INFO L470 AbstractCegarLoop]: Abstraction has 517584 states and 2702392 transitions. [2022-01-18 05:23:12,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:23:12,850 INFO L276 IsEmpty]: Start isEmpty. Operand 517584 states and 2702392 transitions. [2022-01-18 05:23:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-18 05:23:16,677 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 05:23:16,677 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 05:23:16,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 05:23:16,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 05:23:16,896 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 2 more)] === [2022-01-18 05:23:16,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 05:23:16,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1316456635, now seen corresponding path program 12 times [2022-01-18 05:23:16,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 05:23:16,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536482862] [2022-01-18 05:23:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 05:23:16,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 05:23:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 05:23:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 05:23:16,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 05:23:16,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536482862] [2022-01-18 05:23:16,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536482862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 05:23:16,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245691643] [2022-01-18 05:23:16,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 05:23:16,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 05:23:16,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 05:23:16,994 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 05:23:16,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 05:23:17,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 05:23:17,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 05:23:17,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 05:23:17,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 05:23:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:23:17,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 05:23:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-18 05:23:17,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245691643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 05:23:17,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 05:23:17,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 05:23:17,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428528153] [2022-01-18 05:23:17,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 05:23:17,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 05:23:17,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 05:23:17,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 05:23:17,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-18 05:23:17,335 INFO L87 Difference]: Start difference. First operand 517584 states and 2702392 transitions. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 05:23:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 05:23:46,417 INFO L93 Difference]: Finished difference Result 1365414 states and 7011918 transitions. [2022-01-18 05:23:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 05:23:46,417 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-01-18 05:23:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 05:24:07,093 INFO L225 Difference]: With dead ends: 1365414 [2022-01-18 05:24:07,094 INFO L226 Difference]: Without dead ends: 1364380 [2022-01-18 05:24:07,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=311, Invalid=1171, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 05:24:07,098 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 596 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 05:24:07,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [596 Valid, 419 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 05:24:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364380 states. [2022-01-18 05:25:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364380 to 970154. [2022-01-18 05:25:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970154 states, 970153 states have (on average 5.248430917597534) internal successors, (5091781), 970153 states have internal predecessors, (5091781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)